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[SOURCE: https://en.wikipedia.org/wiki/Online_shopping] | [TOKENS: 6393] |
Contents Online shopping Online shopping is a form of electronic commerce which allows consumers to buy goods or services directly from a seller over the Internet using a web browser or a mobile app. Consumers generally find a product of interest by visiting a retailer's website specifically. They may also search among alternative vendors using a shopping search engine, which displays the same product's availability and pricing at different e-retailers. Customers can shop online using a variety of different computers and devices, including desktop computers, laptops, tablet computers and smartphones. Online stores that evoke the physical analogy of buying products or services at a regular "brick-and-mortar" retailer or shopping center follow a process called business-to-consumer (B2C) online shopping. When an online store is set up to enable businesses to buy from another business, the process is instead called business-to-business (B2B) online shopping. A typical online store enables the customer to browse the firm's range of products and services, view photos or images of the products, along with information about the product specifications, features and prices. Unlike physical stores which may close at night, online shopping portals are always available to customers. Although there may not be the traditional word of mouth at work on e-commerce platforms, the electronic worth of mouth (ewom) is important when it comes to sales on B2B platforms like Alibaba.com. Studies show that human touch, responsiveness, and resilience are important when it comes to signaling in business relationships. It shows that even in only online sales, the human touch is still important and can impact how buyers and sellers bond and develop relationships of intimacy. This does not require in-person contact. Some of the supplier characteristics are observable, and others are non-observable. Reviews that are sent to suppliers from buyers that can be seen by other buyers also send signals to prospective buyers and can impact their buying decisions. Online stores usually enable shoppers to use "search" features to find specific models, brands or items. Online customers must have access to the Internet and a valid method of payment in order to complete a transaction, such as a credit card, an Interac-enabled debit card, or a service such as PayPal. For physical products (e.g., paperback books or clothes), the e-tailer ships the products to the customer; for digital products, such as digital audio files of songs or software, the e-tailer usually sends the file to the customer over the Internet. The largest of these online retailing corporations are Alibaba.com, Amazon.com, and eBay. Terminology Alternative names for the activity are "e-commerce", a shortened form of "electronic commerce" or "e-shopping", a shortened form of "electronic shopping". An online store may also be called an e-web-store, e-shop, e-store, Internet shop, web-shop, web-store, online store, online storefront and virtual store. Mobile commerce (or m-commerce) describes purchasing from an online retailer's mobile device-optimized website or software application ("app"). These websites or apps are designed to enable customers to browse through a companies' products and services on tablet computers and smartphones.[citation needed] History One of the earliest forms of trade conducted online was IBM's online transaction processing (OLTP) developed in the 1960s, which allowed the processing of financial transactions in real-time. The computerized ticket reservation system developed for American Airlines called Semi-Automatic Business Research Environment (SABRE) was one of its applications. There, computer terminals located in different travel agencies were linked to a large IBM mainframe computer, which processed transactions simultaneously and coordinated them so that all travel agents had access to the same information at the same time. At some point between 1971 and 1972, students at Stanford and MIT used the internet precursor ARPANET to make a deal to exchange marijuana, but the interaction does not qualify as e-commerce because no money was transferred online. The landscape of online shopping as we know it today took shape with the rise of the Internet. Initially serving as a mere advertising platform, the Internet transitioned swiftly into a dynamic space for actual online transactions. This transformation was fueled by the development of interactive web pages and secure transmission protocols, marking a pivotal moment in 1994 with the first online sales of Sting's album, Ten Summoner's Tales. This milestone event set the stage for the diversification of online retail, with early adopters such as wine, chocolates, and flowers paving the way. These products became pioneers in the e-commerce realm, capturing the attention of a growing audience. Researchers identified a crucial factor for internet success – the suitability of products for online transactions. Generic items that didn't necessitate physical interaction gained traction, propelling the online shopping trend forward. In its nascent stages, online shopping faced a limited audience. The early adopters were predominantly affluent males aged 30 and above. However, this demographic landscape underwent significant changes over time, and the online shopping sphere became more inclusive. Over the years, the United Kingdom has witnessed a substantial shift in consumer behavior, with online shopping accounting for a noteworthy percentage of retail transactions. The extent of this influence varies depending on the product category, highlighting the diverse ways in which consumers engage with online platforms. As the revenues from online sales continued to grow significantly researchers identified different types of online shoppers, Rohm & Swaninathan identified four categories and named them "convenience shoppers, variety seekers, balanced buyers, and store-oriented shoppers". They focused on shopping motivations and found that the variety of products available and the perceived convenience of the buying online experience were significant motivating factors. This was different for offline shoppers, who were more motivated by time saving and recreational motives. English entrepreneur Michael Aldrich was a pioneer of online shopping in 1979. His system connected a modified domestic TV to a real-time transaction processing computer via a domestic telephone line. He believed that videotex, the modified domestic TV technology with a simple menu-driven human–computer interface, was a 'new, universally applicable, participative communication medium — the first since the invention of the telephone.' This enabled 'closed' corporate information systems to be opened to 'outside' correspondents not just for transaction processing but also for e-messaging and information retrieval and dissemination, later known as e-business. His definition of the new mass communications medium as 'participative' [interactive, many-to-many] was fundamentally different from the traditional definitions of mass communication and mass media and a precursor to the social networking on the Internet 25 years later. In March 1980 he launched Redifon's Office Revolution, which allowed consumers, customers, agents, distributors, suppliers and service companies to be connected online to the corporate systems and allow business transactions to be completed electronically in real-time. During the 1980s he designed, manufactured, sold, installed, maintained and supported many online shopping systems, using videotex technology. These systems which also provided voice response and handprint processing pre-date the Internet and the World Wide Web, the IBM PC, and Microsoft MS-DOS, and were installed mainly in the UK by large corporations. The first World Wide Web server and browser, created by Tim Berners-Lee in 1989, opened for commercial use in 1991. Thereafter, subsequent technological innovations emerged in 1994: online banking, the opening of an online pizza shop by Pizza Hut, Netscape's SSL v2 encryption standard for secure data transfer, and Intershop's first online shopping system. The first secure retail transaction over the Web was either by NetMarket or Internet Shopping Network in 1994. Immediately after, Amazon.com launched its online shopping site in 1995 and eBay was also introduced in 1995. Alibaba's sites Taobao and Tmall were launched in 2003 and 2008, respectively. Retailers are increasingly selling goods and services prior to availability through "pretail" for testing, building, and managing demand.[citation needed] International statistics Statistics show that in 2012, Asia-Pacific increased their international sales over 30% giving them over $433 billion in revenue. That is a $69 billion difference between the U.S. revenue of $364.66 billion. It is estimated that Asia-Pacific will increase by another 30% in the year 2013 putting them ahead by more than one-third of all global e-commerce sales.[needs update] The largest online shopping day in the world is Singles Day, with sales just in Alibaba's sites at US$9.3 billion in 2014. In 2018, 9.8% of all retail sales in the United States were made online. In 2019, that figure was 2.8% in Canada. In the United Kingdom, online sales peaked at 37.8% of all retail sales in January 2021, and were at 26.3% in January 2024. Customers Online customers must have access to the Internet and a valid method of payment in order to complete a transaction. Generally, higher levels of education and personal income correspond to more favorable perceptions of shopping online. Increased exposure to technology also increases the probability of developing favorable attitudes towards new shopping channels. In addition, age is also a significant factor that affects online shopping.Culture can have a big effect on how shoppers trust reviews and make important decisions. People in different countries can respond differently to online information than someone from their own country. On top of that, after the pandemic, it seems that more people are relying on online websites for things they used to buy in person at the store. People feel that privacy and security factors have an even more significant impact on attitudes toward online shopping than product factors. Shoppers of different age groups have different perceptions of the risk factors of online shopping. Customer buying behaviour in digital environment The marketing around the digital environment, customer's buying behaviour may not be influenced and controlled by the brand and firm, when they make a buying decision that might concern the interactions with search engine, recommendations, online reviews and other information. In modern shopping environments, people are more likely to use their mobile phones, computers, tablets and other digital devices to gather information. When people shop online, how risky they feel when purchasing an item plays a big role. Websites that offer secure payment options and good delivery systems make shoppers feel safer and more open to making a purchase. Plus, the way reviews are presented with like the design of the site, layout, and pictures, will also really influence their decisions. In an online shopping environment, interactive decision may have an influence on aid customer decision making, through online product reviews and user-generated content, typically provided through software from companies like Bazaarvoice and Trustpilot, or via social media. This content, which can include text or video-based reviews, customer photos, and feedback, is often displayed alongside products being sold on websites like Amazon, Target, and most other digital storefronts. Subsequently, risk and trust would also are two important factors affecting people's' behavior in digital environments. Customers consider to switch between e-channels, because they are mainly influence by the comparison with offline shopping, involving growth of security, financial and performance-risks In other words, a customer shopping online that they may receive more risk than people shopping in stores. There are three factors may influence people to do the buying decision, firstly, people cannot examine whether the product satisfy their needs and wants before they receive it. Secondly, customer may concern at after-sale services. Finally, customer may afraid that they cannot fully understand the language used in e-sales. Based on those factors customer perceive risk may as a significantly reason influence the online purchasing behaviour. Online retailers has place much emphasis on customer trust aspect, trust is another way driving customer's behaviour in digital environment, which can depend on customer's attitude and expectation. Indeed, the company's products design or ideas can not met customer's expectations. Customer's purchase intention based on rational expectations, and additionally impacts on emotional trust. Moreover, those expectations can be also establish on the product information and revision from others. In several studies, perceived value, shopping style, and brand trust are the main factors that affect online consumers' decisions. The perceived value means that people can compare the products and prices online, bringing them the perceived value of getting more benefits online than in an offline store. The comfortable environment that online shopping brings to customers can make consumers get more perceived value. In the end, E-commerce behavior is still mostly influenced by families that are receptive to new technologies, and to a lesser extent by efficiency concerns. Product selection Consumers find a product of interest by visiting the website of the retailer directly or by searching among alternative vendors using a shopping search engine. Users can compare and evaluate products using product information on the website, as well on other websites such as websites about product tests. Once a particular product has been found and selected on the website of the seller, most online retailers use shopping cart software to allow the consumer to accumulate multiple items and to adjust quantities, like filling a physical shopping cart or basket in a conventional store. A "checkout" process follows (continuing the physical-store analogy) in which payment and delivery information is collected, if necessary. Some stores allow consumers to sign up for a permanent online account so that some or all of this information only needs to be entered once. The consumer often receives an e-mail confirmation once the transaction is complete. Less sophisticated stores may rely on consumers to phone or e-mail their orders (although full credit card numbers, expiry date, and Card Security Code, or bank account and routing number should not be accepted by e-mail, for reasons of security). One of the great benefits of online shopping is the ability to read product reviews, written either by experts or fellow online shoppers. The Nielsen Company conducted a survey in March 2010 and polled more than 27,000 Internet users in 55 markets from the Asia-Pacific, Europe, Middle East, North America, and South America to look at questions such as "How do consumers shop online?", "What do they intend to buy?", "How do they use various online shopping web pages?", and the impact of social media and other factors that come into play when consumers are trying to decide how to spend their money on which product or service. According to the research, reviews on electronics (57%) such as DVD players, cellphones, or PlayStations, and so on, reviews on cars (45%), and reviews on software (37%) play an important role in influencing consumers who tend to make purchases online. Furthermore, 40% of online shoppers indicate that they would not even buy electronics without consulting online reviews first. Studies using eye-tracking can show how people pay attention to certain parts of reviews and product images, which can really show how and what they decide to get. Other research shows that reviews that talk about certain prices, quality, and delivery tend to have a big impact on how customers tend to spend their money online. In addition to online reviews, peer recommendations on online shopping pages or social media websites play a key role for online shoppers when they are researching future purchases. 90% of all purchases made are influenced by social media. Payment Online shoppers commonly use a credit card or a PayPal account in order to make payments. Having a safe and reliable payment process can be a great way to build trust. If people feel their money is secure and safe within the buying process, they will most likely purchase the product and feel comfortable about it. However, some systems enable users to create accounts and pay by alternative means, such as: Some online shops will not accept international credit cards. Some require both the purchaser's billing and shipping address to be in the same country as the online shop's base of operation. Other online shops allow customers from any country to send gifts anywhere. The financial part of a transaction may be processed in real time (e.g. letting the consumer know their credit card was declined before they log off), or may be done later as part of the fulfillment process. Product delivery Once a payment has been accepted, the goods or services can be delivered in the following ways. For physical items: For digital items or tickets: Shopping cart systems Simple shopping cart systems allow the off-line administration of products and categories. The shop is then generated as HTML files and graphics that can be uploaded to a webspace. The systems do not use an online database. A high-end solution can be bought or rented as a stand-alone program or as an addition to an enterprise resource planning program. It is usually installed on the company's web server and may integrate into the existing supply chain so that ordering, payment, delivery, accounting and warehousing can be automated to a large extent. Other solutions allow the user to register and create an online shop on a portal that hosts multiple shops simultaneously from one back office. Examples are BigCommerce, Shopify and FlickRocket. Open source shopping cart packages include advanced platforms such as Interchange, and off-the-shelf solutions such as Magento, osCommerce, WooCommerce, PrestaShop, and Zen Cart. Commercial systems can also be tailored so the shop does not have to be created from scratch. By using an existing framework, software modules for various functionalities required by a web shop can be adapted and combined. Design Customers are attracted to online shopping not only because of high levels of convenience, but also because of broader selections, competitive pricing, and greater access to information. Business organizations seek to offer online shopping not only because it is of much lower cost compared to bricks and mortar stores, but also because it offers access to a worldwide market, increases customer value, and builds sustainable capabilities. Designers of online shops are concerned with the effects of information load. Information load is a product of the spatial and temporal arrangements of stimuli in the web store. Compared with conventional retail shopping, the information environment of virtual shopping is enhanced by providing additional product information such as comparative products and services, as well as various alternatives and attributes of each alternative, etc. Two major dimensions of information load are complexity and novelty. Complexity refers to the number of different elements or features of a site, often the result of increased information diversity. Novelty involves the unexpected, suppressed, new, or unfamiliar aspects of the site. The novelty dimension may keep consumers exploring a shopping site, whereas the complexity dimension may induce impulse purchases. Internet consumers are self-conscious and emphasize personalized consumption, which makes the demand for online consumption different. Online consumers have different needs depending on their time and environment. Even different online consumers have different needs at the same level of demand due to the difference in income level and other factors. Compared with the centralized nature of traditional markets, online consumption is more decentralized. In the online consumer market, consumers have a short decision time, a large variability of consumer demand, a large number of purchases, but a relatively small amount of each purchase, a considerable mobility of purchases, a strong substitutability of goods, and a large elasticity of demand. According to the output of a research report by Western Michigan University published in 2005, an e-commerce website does not have to be good looking with listing on a lot of search engines. It must build relationships with customers to make money. The report also suggests that a website must leave a positive impression on the customers, giving them a reason to come back. How people tend to shop and how much they trust a company or brand are all very important factors that can either make or break whether a person buys online. If sites can give good product info, good visuals, and good, reliable reviews, they can make their online shoppers feel safer and overall persuade them to purchase something. However, resent research has proven that sites with higher focus on efficiency, convenience, and personalised services increased the customers motivation to make purchases. Dyn, an Internet performance management company conducted a survey on more than 1400 consumers across 11 countries in North America, Europe, Middle-East and Asia and the results of the survey are as follows: These concerns majorly affect the decisions of almost two thirds of the consumers. The most important factors determining whether customers return to a website are ease of use and the presence of user-friendly features. Usability testing is important for finding problems and improvements in a web site. Methods for evaluating usability include heuristic evaluation, cognitive walkthrough, and user testing. Each technique has its own characteristics and emphasizes different aspects of the user experience. Market share The popularity of online shopping continues to erode sales of conventional retailers. For example, Best Buy, the largest retailer of electronics in the U.S. in August 2014 reported its tenth consecutive quarterly dip in sales, citing an increasing shift by consumers to online shopping. Amazon.com has the largest market share in the United States. As of May 2018, a survey found two-thirds of Americans had bought something from Amazon (92% of those who had bought anything online), with 40% of online shoppers buying something from Amazon at least once a month. The survey found shopping began at amazon.com 44% of the time, compared to a general search engine at 33%. It estimated 75 million Americans subscribe to Amazon Prime and 35 million more use someone else's account. There were 242 million people shopping online in China in 2012. For developing countries and low-income households in developed countries, adoption of e-commerce in place of or in addition to conventional methods is limited by a lack of affordable Internet access. Advantages Online stores are usually available 24 hours a day, and many consumers in Western countries have Internet access both at work and at home. Other establishments such as Internet cafes, community centers and schools provide internet access as well. In contrast, visiting a conventional retail store requires travel or commuting and costs such as gas, parking, or bus tickets, and must usually take place during business hours. Delivery was always a problem which affected the convenience of online shopping. Additionally, the online shopping industry has not only involved the concept of providing convenience for customers but also improved perceptions of social inclusion. However to overcome this many retailers including online retailers in Taiwan brought in a store pick up service. This now meant that customers could purchase goods online and pick them up at a nearby convenience store, making online shopping more advantageous to customers. In the event of a problem with the item (e.g., the product was not what the consumer ordered or the product was not satisfactory), consumers are concerned with the ease of returning an item in exchange for the correct product or a refund. Consumers may need to contact the retailer, visit the post office and pay return shipping, and then wait for a replacement or refund. Some online companies have more generous return policies to compensate for the traditional advantage of physical stores. For example, the online shoe retailer Zappos.com includes labels for free return shipping, and does not charge a restocking fee, even for returns which are not the result of merchant error. (Note: In the United Kingdom, online shops are prohibited from charging a restocking fee if the consumer cancels their order in accordance with the Consumer Protection (Distance Selling) Act 2000). A 2018 survey in the United States found 26% of online shoppers said they never return items, and another 65% said they rarely do so. Merchants may benefit from online shopping due to low sales inventory pressure, low operating costs, and the scale of operation is not limited by the site. Especially in cases of large or heavy products, delivery can be not only more convenient but also not require having or using a car. Not using or depending on personal vehicles, which can have substantial impact on the environment, to travel to local stores can make online shopping more sustainable than buying in local stores if such are used otherwise (especially if items are bundled and delivery vehicles are electric and use optimized routes). Moreover, the pace of urbanization, local delivery systems, and internet connectivity which facilitate the delivery process are the major determinants of e-commerce adoption, Online shopping is usually more informationally rich than shopping at physical stores traveled to and usually has higher comparability and customizability. Online stores must describe products for sale with text, photos, and multimedia files, and sometimes have features such as question and answers or filters, whereas in a physical retail store, the actual product and the manufacturer's packaging will be available for direct inspection (which might involve a test drive, fitting, or other experimentation). Some online stores provide or link to supplemental product information, such as instructions, safety procedures, demonstrations, or manufacturer specifications. Research shows that when consumers are looking at reviews, they pay attention to both the text and the picture of the product. Positive reviews and well-organized information can make people feel comfortable in themselves as a buyer and comfortable in the website or company they are shopping with. Some provide background information, advice, or how-to guides designed to help consumers decide which product to buy. Some stores even allow customers to comment or rate their items. There are also dedicated review sites that host user reviews for different products. Reviews and even some blogs give customers the option of shopping for cheaper purchases from all over the world without having to depend on local retailers. In a conventional retail store, clerks are generally available to answer questions. Some online stores have real-time chat features, but most rely on e-mails or phone calls to handle customer questions. Even if an online store is open 24 hours a day, seven days a week, the customer service team may only be available during regular business hours. It also implies that geographical factors, rather than socioeconomic issues, must be addressed in order to improve online shopping acceptance. One advantage of shopping online is being able to quickly seek out deals for items or services provided by many different vendors (though some local search engines do exist to help consumers locate products for sale in nearby stores). Search engines, online price comparison services and discovery shopping engines can be used to look up sellers of a particular product or service. Shipping costs (if applicable) reduce the price advantage of online merchandise, though depending on the jurisdiction, a lack of sales tax may compensate for this. Shipping a small number of items, especially from another country, is much more expensive than making the larger shipments bricks-and-mortar retailers order. Some retailers (especially those selling small, high-value items like electronics) offer free shipping on sufficiently large orders. Another major advantage for retailers is the ability to rapidly switch suppliers and vendors without disrupting users' shopping experience. Disadvantages Given the lack of ability to inspect merchandise before purchase, consumers are at higher risk of fraud than face-to-face transactions. When ordering merchandise online, the item may not work properly, it may have defects, or it might not be the same item pictured in the online photo. Merchants also risk fraudulent purchases if customers are using stolen credit cards or fraudulent repudiation of the online purchase. However, merchants face less risk from physical theft by using a warehouse instead of a retail storefront. Secure Sockets Layer (SSL) encryption has generally solved the problem of credit card numbers being intercepted in transit between the consumer and the merchant. However, one must still trust the merchant (and employees) not to use the credit card information subsequently for their own purchases, and not to pass the information to others. Also, hackers might break into a merchant's web site and steal names, addresses and credit card numbers, although the Payment Card Industry Data Security Standard is intended to minimize the impact of such breaches. Identity theft is still a concern for consumers. A number of high-profile break-ins in the 2000s has prompted some U.S. states to require disclosure to consumers when this happens. Computer security has thus become a major concern for merchants and e-commerce service providers, who deploy countermeasures such as firewalls and anti-virus software to protect their networks. Phishing is another danger, where consumers are fooled into thinking they are dealing with a reputable retailer, when they have actually been manipulated into feeding private information to a system operated by a malicious party. Denial of service attacks are a minor risk for merchants, as are server and network outages. Quality seals can be placed on the Shop web page if it has undergone an independent assessment and meets all requirements of the company issuing the seal. The purpose of these seals is to increase the confidence of online shoppers. However, the existence of many different seals, or seals unfamiliar to consumers, may foil this effort to a certain extent. A number of resources offer advice on how consumers can protect themselves when using online retailer services. These include: Although the benefits of online shopping are considerable, when the process goes poorly it can create a thorny situation. A few problems that shoppers potentially face include identity theft, faulty products, and the accumulation of spyware. If users are required to put in their credit card information and billing/shipping address and the website is not secure, customer information can be accessible to anyone who knows how to obtain it. Most large online corporations are inventing new ways to make fraud more difficult. However, criminals are constantly responding to these developments with new ways to manipulate the system. Even though online retailers are making efforts to protect consumer information, it is a constant fight to maintain the lead. It is advisable to be aware of the most current technology and scams to protect consumer identity and finances. Product delivery is also a main concern of online shopping. Most companies offer shipping insurance in case the product is lost or damaged. Some shipping companies will offer refunds or compensation for the damage, but this is up to their discretion. Fencing is another growing societal problem associated with online platforms. Stolen merchandise from brick and mortal retailers and cargo are easily resold to the public through third party marketplaces due to lack of accountability and regulation by online operators. In the United States alone, businesses are facing the brunt of organized retail crime with the value of stolen goods amounting to $68.8 billion in 2021 (equivalent to 1.47% of all sales or $214 per capita nationwide). These goods are typically passed off as legitimate, and resold online to unsuspecting buyers. The lack of full cost disclosure may also be problematic. While it may be easy to compare the base price of an item online, it may not be easy to see the total cost up front. Additional fees such as shipping are often not visible until the final step in the checkout process. The problem is especially evident with cross-border purchases, where the cost indicated at the final checkout screen may not include additional fees that must be paid upon delivery such as duties and brokerage. Some services such as the Canadian-based Wishabi attempts to include estimates of these additional cost, but nevertheless, the lack of general full cost disclosure remains a concern. Privacy of personal information is a significant issue for some consumers. Many consumers wish to avoid spam and telemarketing which could result from supplying contact information to an online merchant. In response, many merchants promise to not use consumer information for these purposes, Many websites keep track of consumer shopping habits in order to suggest items and other websites to view. Brick-and-mortar stores also collect consumer information. Some ask for a shopper's address and phone number at checkout, though consumers may refuse to provide it. Many larger stores use the address information encoded on consumers' credit cards (often without their knowledge) to add them to a catalog mailing list. This information is obviously not accessible to the merchant when paying in cash or through a bank (money transfer, in which case there is also proof of payment). Aggregation High-volume websites, such as Yahoo!, Amazon.com and eBay offer hosting services for online stores to all size retailers. These stores are presented within an integrated navigation framework, sometimes known as virtual shopping malls or online marketplaces. See also References External links |
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[SOURCE: https://www.reddit.com/user/purple_guy207] | [TOKENS: 140] |
Lex u/purple_guy207 Lex NSFW - Adult Content reddit is the worst site i've ever seen for giving opinion, this is the passive-aggressive twitter and theres alot of people that lack intellect... the only reason im here is tips in specific subs. 1,673 10 post karma, 1663 comment karma Karma 1,200 Contributions 6 y Cake day: Jan 30, 2020 Reddit Age Trophy Case This page may contain sensitive or adult content that’s not for everyone. To view it, please log in to confirm your age.By continuing, you also agree that use of this site constitutes acceptance of Reddit’s User Agreement and acknowledgement of our Privacy Policy. |
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[SOURCE: https://en.wikipedia.org/wiki/United_States#cite_note-11] | [TOKENS: 17273] |
Contents United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean.[j] It is a megadiverse country, with the world's third-largest land area[c] and third-largest population, exceeding 341 million.[k] Paleo-Indians first migrated from North Asia to North America at least 15,000 years ago, and formed various civilizations. Spanish colonization established Spanish Florida in 1513, the first European colony in what is now the continental United States. British colonization followed with the 1607 settlement of Virginia, the first of the Thirteen Colonies. Enslavement of Africans was practiced in all colonies by 1770 and supplied most of the labor for the Southern Colonies' plantation economy. Clashes with the British Crown began as a civil protest over the illegality of taxation without representation in Parliament and the denial of other English rights. They evolved into the American Revolution, which led to the Declaration of Independence and a society based on universal rights. Victory in the 1775–1783 Revolutionary War brought international recognition of U.S. sovereignty and fueled westward expansion, further dispossessing native inhabitants. As more states were admitted, a North–South division over slavery led the Confederate States of America to declare secession and fight the Union in the 1861–1865 American Civil War. With the United States' victory and reunification, slavery was abolished nationally. By the late 19th century, the U.S. economy outpaced the French, German and British economies combined. As of 1900, the country had established itself as a great power, a status solidified after its involvement in World War I. Following Japan's attack on Pearl Harbor in 1941, the U.S. entered World War II. Its aftermath left the U.S. and the Soviet Union as rival superpowers, competing for ideological dominance and international influence during the Cold War. The Soviet Union's collapse in 1991 ended the Cold War, leaving the U.S. as the world's sole superpower. The U.S. federal government is a representative democracy with a president and a constitution that grants separation of powers under three branches: legislative, executive, and judicial. The United States Congress is a bicameral national legislature composed of the House of Representatives (a lower house based on population) and the Senate (an upper house based on equal representation for each state). Federalism grants substantial autonomy to the 50 states. In addition, 574 Native American tribes have sovereignty rights, and there are 326 Native American reservations. Since the 1850s, the Democratic and Republican parties have dominated American politics. American ideals and values are based on a democratic tradition inspired by the American Enlightenment movement. A developed country, the U.S. ranks high in economic competitiveness, innovation, and higher education. Accounting for over a quarter of nominal global GDP, its economy has been the world's largest since about 1890. It is the wealthiest country, with the highest disposable household income per capita among OECD members, though its wealth inequality is highly pronounced. Shaped by centuries of immigration, the culture of the U.S. is diverse and globally influential. Making up more than a third of global military spending, the country has one of the strongest armed forces and is a designated nuclear state. A member of numerous international organizations, the U.S. plays a major role in global political, cultural, economic, and military affairs. Etymology Documented use of the phrase "United States of America" dates back to January 2, 1776. On that day, Stephen Moylan, a Continental Army aide to General George Washington, wrote a letter to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort. The first known public usage is an anonymous essay published in the Williamsburg newspaper The Virginia Gazette on April 6, 1776. Sometime on or after June 11, 1776, Thomas Jefferson wrote "United States of America" in a rough draft of the Declaration of Independence, which was adopted by the Second Continental Congress on July 4, 1776. The term "United States" and its initialism "U.S.", used as nouns or as adjectives in English, are common short names for the country. The initialism "USA", a noun, is also common. "United States" and "U.S." are the established terms throughout the U.S. federal government, with prescribed rules.[l] "The States" is an established colloquial shortening of the name, used particularly from abroad; "stateside" is the corresponding adjective or adverb. "America" is the feminine form of the first word of Americus Vesputius, the Latinized name of Italian explorer Amerigo Vespucci (1454–1512);[m] it was first used as a place name by the German cartographers Martin Waldseemüller and Matthias Ringmann in 1507.[n] Vespucci first proposed that the West Indies discovered by Christopher Columbus in 1492 were part of a previously unknown landmass and not among the Indies at the eastern limit of Asia. In English, the term "America" usually does not refer to topics unrelated to the United States, despite the usage of "the Americas" to describe the totality of the continents of North and South America. History The first inhabitants of North America migrated from Siberia approximately 15,000 years ago, either across the Bering land bridge or along the now-submerged Ice Age coastline. Small isolated groups of hunter-gatherers are said to have migrated alongside herds of large herbivores far into Alaska, with ice-free corridors developing along the Pacific coast and valleys of North America in c. 16,500 – c. 13,500 BCE (c. 18,500 – c. 15,500 BP). The Clovis culture, which appeared around 11,000 BCE, is believed to be the first widespread culture in the Americas. Over time, Indigenous North American cultures grew increasingly sophisticated, and some, such as the Mississippian culture, developed agriculture, architecture, and complex societies. In the post-archaic period, the Mississippian cultures were located in the midwestern, eastern, and southern regions, and the Algonquian in the Great Lakes region and along the Eastern Seaboard, while the Hohokam culture and Ancestral Puebloans inhabited the Southwest. Native population estimates of what is now the United States before the arrival of European colonizers range from around 500,000 to nearly 10 million. Christopher Columbus began exploring the Caribbean for Spain in 1492, leading to Spanish-speaking settlements and missions from what are now Puerto Rico and Florida to New Mexico and California. The first Spanish colony in the present-day continental United States was Spanish Florida, chartered in 1513. After several settlements failed there due to starvation and disease, Spain's first permanent town, Saint Augustine, was founded in 1565. France established its own settlements in French Florida in 1562, but they were either abandoned (Charlesfort, 1578) or destroyed by Spanish raids (Fort Caroline, 1565). Permanent French settlements were founded much later along the Great Lakes (Fort Detroit, 1701), the Mississippi River (Saint Louis, 1764) and especially the Gulf of Mexico (New Orleans, 1718). Early European colonies also included the thriving Dutch colony of New Nederland (settled 1626, present-day New York) and the small Swedish colony of New Sweden (settled 1638 in what became Delaware). British colonization of the East Coast began with the Virginia Colony (1607) and the Plymouth Colony (Massachusetts, 1620). The Mayflower Compact in Massachusetts and the Fundamental Orders of Connecticut established precedents for local representative self-governance and constitutionalism that would develop throughout the American colonies. While European settlers in what is now the United States experienced conflicts with Native Americans, they also engaged in trade, exchanging European tools for food and animal pelts.[o] Relations ranged from close cooperation to warfare and massacres. The colonial authorities often pursued policies that forced Native Americans to adopt European lifestyles, including conversion to Christianity. Along the eastern seaboard, settlers trafficked Africans through the Atlantic slave trade, largely to provide manual labor on plantations. The original Thirteen Colonies[p] that would later found the United States were administered as possessions of the British Empire by Crown-appointed governors, though local governments held elections open to most white male property owners. The colonial population grew rapidly from Maine to Georgia, eclipsing Native American populations; by the 1770s, the natural increase of the population was such that only a small minority of Americans had been born overseas. The colonies' distance from Britain facilitated the entrenchment of self-governance, and the First Great Awakening, a series of Christian revivals, fueled colonial interest in guaranteed religious liberty. Following its victory in the French and Indian War, Britain began to assert greater control over local affairs in the Thirteen Colonies, resulting in growing political resistance. One of the primary grievances of the colonists was the denial of their rights as Englishmen, particularly the right to representation in the British government that taxed them. To demonstrate their dissatisfaction and resolve, the First Continental Congress met in 1774 and passed the Continental Association, a colonial boycott of British goods enforced by local "committees of safety" that proved effective. The British attempt to then disarm the colonists resulted in the 1775 Battles of Lexington and Concord, igniting the American Revolutionary War. At the Second Continental Congress, the colonies appointed George Washington commander-in-chief of the Continental Army, and created a committee that named Thomas Jefferson to draft the Declaration of Independence. Two days after the Second Continental Congress passed the Lee Resolution to create an independent, sovereign nation, the Declaration was adopted on July 4, 1776. The political values of the American Revolution evolved from an armed rebellion demanding reform within an empire to a revolution that created a new social and governing system founded on the defense of liberty and the protection of inalienable natural rights; sovereignty of the people; republicanism over monarchy, aristocracy, and other hereditary political power; civic virtue; and an intolerance of political corruption. The Founding Fathers of the United States, who included Washington, Jefferson, John Adams, Benjamin Franklin, Alexander Hamilton, John Jay, James Madison, Thomas Paine, and many others, were inspired by Classical, Renaissance, and Enlightenment philosophies and ideas. Though in practical effect since its drafting in 1777, the Articles of Confederation was ratified in 1781 and formally established a decentralized government that operated until 1789. After the British surrender at the siege of Yorktown in 1781, American sovereignty was internationally recognized by the Treaty of Paris (1783), through which the U.S. gained territory stretching west to the Mississippi River, north to present-day Canada, and south to Spanish Florida. The Northwest Ordinance (1787) established the precedent by which the country's territory would expand with the admission of new states, rather than the expansion of existing states. The U.S. Constitution was drafted at the 1787 Constitutional Convention to overcome the limitations of the Articles. It went into effect in 1789, creating a federal republic governed by three separate branches that together formed a system of checks and balances. George Washington was elected the country's first president under the Constitution, and the Bill of Rights was adopted in 1791 to allay skeptics' concerns about the power of the more centralized government. His resignation as commander-in-chief after the Revolutionary War and his later refusal to run for a third term as the country's first president established a precedent for the supremacy of civil authority in the United States and the peaceful transfer of power. In the late 18th century, American settlers began to expand westward in larger numbers, many with a sense of manifest destiny. The Louisiana Purchase of 1803 from France nearly doubled the territory of the United States. Lingering issues with Britain remained, leading to the War of 1812, which was fought to a draw. Spain ceded Florida and its Gulf Coast territory in 1819. The Missouri Compromise of 1820, which admitted Missouri as a slave state and Maine as a free state, attempted to balance the desire of northern states to prevent the expansion of slavery into new territories with that of southern states to extend it there. Primarily, the compromise prohibited slavery in all other lands of the Louisiana Purchase north of the 36°30′ parallel. As Americans expanded further into territory inhabited by Native Americans, the federal government implemented policies of Indian removal or assimilation. The most significant such legislation was the Indian Removal Act of 1830, a key policy of President Andrew Jackson. It resulted in the Trail of Tears (1830–1850), in which an estimated 60,000 Native Americans living east of the Mississippi River were forcibly removed and displaced to lands far to the west, causing 13,200 to 16,700 deaths along the forced march. Settler expansion as well as this influx of Indigenous peoples from the East resulted in the American Indian Wars west of the Mississippi. During the colonial period, slavery became legal in all the Thirteen colonies, but by 1770 it provided the main labor force in the large-scale, agriculture-dependent economies of the Southern Colonies from Maryland to Georgia. The practice began to be significantly questioned during the American Revolution, and spurred by an active abolitionist movement that had reemerged in the 1830s, states in the North enacted laws to prohibit slavery within their boundaries. At the same time, support for slavery had strengthened in Southern states, with widespread use of inventions such as the cotton gin (1793) having made slavery immensely profitable for Southern elites. The United States annexed the Republic of Texas in 1845, and the 1846 Oregon Treaty led to U.S. control of the present-day American Northwest. Dispute with Mexico over Texas led to the Mexican–American War (1846–1848). After the victory of the U.S., Mexico recognized U.S. sovereignty over Texas, New Mexico, and California in the 1848 Mexican Cession; the cession's lands also included the future states of Nevada, Colorado and Utah. The California gold rush of 1848–1849 spurred a huge migration of white settlers to the Pacific coast, leading to even more confrontations with Native populations. One of the most violent, the California genocide of thousands of Native inhabitants, lasted into the mid-1870s. Additional western territories and states were created. Throughout the 1850s, the sectional conflict regarding slavery was further inflamed by national legislation in the U.S. Congress and decisions of the Supreme Court. In Congress, the Fugitive Slave Act of 1850 mandated the forcible return to their owners in the South of slaves taking refuge in non-slave states, while the Kansas–Nebraska Act of 1854 effectively gutted the anti-slavery requirements of the Missouri Compromise. In its Dred Scott decision of 1857, the Supreme Court ruled against a slave brought into non-slave territory, simultaneously declaring the entire Missouri Compromise to be unconstitutional. These and other events exacerbated tensions between North and South that would culminate in the American Civil War (1861–1865). Beginning with South Carolina, 11 slave-state governments voted to secede from the United States in 1861, joining to create the Confederate States of America. All other state governments remained loyal to the Union.[q] War broke out in April 1861 after the Confederacy bombarded Fort Sumter. Following the Emancipation Proclamation on January 1, 1863, many freed slaves joined the Union army. The war began to turn in the Union's favor following the 1863 Siege of Vicksburg and Battle of Gettysburg, and the Confederates surrendered in 1865 after the Union's victory in the Battle of Appomattox Court House. Efforts toward reconstruction in the secessionist South had begun as early as 1862, but it was only after President Lincoln's assassination that the three Reconstruction Amendments to the Constitution were ratified to protect civil rights. The amendments codified nationally the abolition of slavery and involuntary servitude except as punishment for crimes, promised equal protection under the law for all persons, and prohibited discrimination on the basis of race or previous enslavement. As a result, African Americans took an active political role in ex-Confederate states in the decade following the Civil War. The former Confederate states were readmitted to the Union, beginning with Tennessee in 1866 and ending with Georgia in 1870. National infrastructure, including transcontinental telegraph and railroads, spurred growth in the American frontier. This was accelerated by the Homestead Acts, through which nearly 10 percent of the total land area of the United States was given away free to some 1.6 million homesteaders. From 1865 through 1917, an unprecedented stream of immigrants arrived in the United States, including 24.4 million from Europe. Most came through the Port of New York, as New York City and other large cities on the East Coast became home to large Jewish, Irish, and Italian populations. Many Northern Europeans as well as significant numbers of Germans and other Central Europeans moved to the Midwest. At the same time, about one million French Canadians migrated from Quebec to New England. During the Great Migration, millions of African Americans left the rural South for urban areas in the North. Alaska was purchased from Russia in 1867. The Compromise of 1877 is generally considered the end of the Reconstruction era, as it resolved the electoral crisis following the 1876 presidential election and led President Rutherford B. Hayes to reduce the role of federal troops in the South. Immediately, the Redeemers began evicting the Carpetbaggers and quickly regained local control of Southern politics in the name of white supremacy. African Americans endured a period of heightened, overt racism following Reconstruction, a time often considered the nadir of American race relations. A series of Supreme Court decisions, including Plessy v. Ferguson, emptied the Fourteenth and Fifteenth Amendments of their force, allowing Jim Crow laws in the South to remain unchecked, sundown towns in the Midwest, and segregation in communities across the country, which would be reinforced in part by the policy of redlining later adopted by the federal Home Owners' Loan Corporation. An explosion of technological advancement, accompanied by the exploitation of cheap immigrant labor, led to rapid economic expansion during the Gilded Age of the late 19th century. It continued into the early 20th, when the United States already outpaced the economies of Britain, France, and Germany combined. This fostered the amassing of power by a few prominent industrialists, largely by their formation of trusts and monopolies to prevent competition. Tycoons led the nation's expansion in the railroad, petroleum, and steel industries. The United States emerged as a pioneer of the automotive industry. These changes resulted in significant increases in economic inequality, slum conditions, and social unrest, creating the environment for labor unions and socialist movements to begin to flourish. This period eventually ended with the advent of the Progressive Era, which was characterized by significant economic and social reforms. Pro-American elements in Hawaii overthrew the Hawaiian monarchy; the islands were annexed in 1898. That same year, Puerto Rico, the Philippines, and Guam were ceded to the U.S. by Spain after the latter's defeat in the Spanish–American War. (The Philippines was granted full independence from the U.S. on July 4, 1946, following World War II. Puerto Rico and Guam have remained U.S. territories.) American Samoa was acquired by the United States in 1900 after the Second Samoan Civil War. The U.S. Virgin Islands were purchased from Denmark in 1917. The United States entered World War I alongside the Allies in 1917 helping to turn the tide against the Central Powers. In 1920, a constitutional amendment granted nationwide women's suffrage. During the 1920s and 1930s, radio for mass communication and early television transformed communications nationwide. The Wall Street Crash of 1929 triggered the Great Depression, to which President Franklin D. Roosevelt responded with the New Deal plan of "reform, recovery and relief", a series of unprecedented and sweeping recovery programs and employment relief projects combined with financial reforms and regulations. Initially neutral during World War II, the U.S. began supplying war materiel to the Allies of World War II in March 1941 and entered the war in December after Japan's attack on Pearl Harbor. Agreeing to a "Europe first" policy, the U.S. concentrated its wartime efforts on Japan's allies Italy and Germany until their final defeat in May 1945. The U.S. developed the first nuclear weapons and used them against the Japanese cities of Hiroshima and Nagasaki in August 1945, ending the war. The United States was one of the "Four Policemen" who met to plan the post-war world, alongside the United Kingdom, the Soviet Union, and China. The U.S. emerged relatively unscathed from the war, with even greater economic power and international political influence. The end of World War II in 1945 left the U.S. and the Soviet Union as superpowers, each with its own political, military, and economic sphere of influence. Geopolitical tensions between the two superpowers soon led to the Cold War. The U.S. implemented a policy of containment intended to limit the Soviet Union's sphere of influence; engaged in regime change against governments perceived to be aligned with the Soviets; and prevailed in the Space Race, which culminated with the first crewed Moon landing in 1969. Domestically, the U.S. experienced economic growth, urbanization, and population growth following World War II. The civil rights movement emerged, with Martin Luther King Jr. becoming a prominent leader in the early 1960s. The Great Society plan of President Lyndon B. Johnson's administration resulted in groundbreaking and broad-reaching laws, policies and a constitutional amendment to counteract some of the worst effects of lingering institutional racism. The counterculture movement in the U.S. brought significant social changes, including the liberalization of attitudes toward recreational drug use and sexuality. It also encouraged open defiance of the military draft (leading to the end of conscription in 1973) and wide opposition to U.S. intervention in Vietnam, with the U.S. totally withdrawing in 1975. A societal shift in the roles of women was significantly responsible for the large increase in female paid labor participation starting in the 1970s, and by 1985 the majority of American women aged 16 and older were employed. The Fall of Communism and the dissolution of the Soviet Union from 1989 to 1991 marked the end of the Cold War and left the United States as the world's sole superpower. This cemented the United States' global influence, reinforcing the concept of the "American Century" as the U.S. dominated international political, cultural, economic, and military affairs. The 1990s saw the longest recorded economic expansion in American history, a dramatic decline in U.S. crime rates, and advances in technology. Throughout this decade, technological innovations such as the World Wide Web, the evolution of the Pentium microprocessor in accordance with Moore's law, rechargeable lithium-ion batteries, the first gene therapy trial, and cloning either emerged in the U.S. or were improved upon there. The Human Genome Project was formally launched in 1990, while Nasdaq became the first stock market in the United States to trade online in 1998. In the Gulf War of 1991, an American-led international coalition of states expelled an Iraqi invasion force that had occupied neighboring Kuwait. The September 11 attacks on the United States in 2001 by the pan-Islamist militant organization al-Qaeda led to the war on terror and subsequent military interventions in Afghanistan and in Iraq. The U.S. housing bubble culminated in 2007 with the Great Recession, the largest economic contraction since the Great Depression. In the 2010s and early 2020s, the United States has experienced increased political polarization and democratic backsliding. The country's polarization was violently reflected in the January 2021 Capitol attack, when a mob of insurrectionists entered the U.S. Capitol and sought to prevent the peaceful transfer of power in an attempted self-coup d'état. Geography The United States is the world's third-largest country by total area behind Russia and Canada.[c] The 48 contiguous states and the District of Columbia have a combined area of 3,119,885 square miles (8,080,470 km2). In 2021, the United States had 8% of the Earth's permanent meadows and pastures and 10% of its cropland. Starting in the east, the coastal plain of the Atlantic seaboard gives way to inland forests and rolling hills in the Piedmont plateau region. The Appalachian Mountains and the Adirondack Massif separate the East Coast from the Great Lakes and the grasslands of the Midwest. The Mississippi River System, the world's fourth-longest river system, runs predominantly north–south through the center of the country. The flat and fertile prairie of the Great Plains stretches to the west, interrupted by a highland region in the southeast. The Rocky Mountains, west of the Great Plains, extend north to south across the country, peaking at over 14,000 feet (4,300 m) in Colorado. The supervolcano underlying Yellowstone National Park in the Rocky Mountains, the Yellowstone Caldera, is the continent's largest volcanic feature. Farther west are the rocky Great Basin and the Chihuahuan, Sonoran, and Mojave deserts. In the northwest corner of Arizona, carved by the Colorado River, is the Grand Canyon, a steep-sided canyon and popular tourist destination known for its overwhelming visual size and intricate, colorful landscape. The Cascade and Sierra Nevada mountain ranges run close to the Pacific coast. The lowest and highest points in the contiguous United States are in the State of California, about 84 miles (135 km) apart. At an elevation of 20,310 feet (6,190.5 m), Alaska's Denali (also called Mount McKinley) is the highest peak in the country and on the continent. Active volcanoes in the U.S. are common throughout Alaska's Alexander and Aleutian Islands. Located entirely outside North America, the archipelago of Hawaii consists of volcanic islands, physiographically and ethnologically part of the Polynesian subregion of Oceania. In addition to its total land area, the United States has one of the world's largest marine exclusive economic zones spanning approximately 4.5 million square miles (11.7 million km2) of ocean. With its large size and geographic variety, the United States includes most climate types. East of the 100th meridian, the climate ranges from humid continental in the north to humid subtropical in the south. The western Great Plains are semi-arid. Many mountainous areas of the American West have an alpine climate. The climate is arid in the Southwest, Mediterranean in coastal California, and oceanic in coastal Oregon, Washington, and southern Alaska. Most of Alaska is subarctic or polar. Hawaii, the southern tip of Florida and U.S. territories in the Caribbean and Pacific are tropical. The United States receives more high-impact extreme weather incidents than any other country. States bordering the Gulf of Mexico are prone to hurricanes, and most of the world's tornadoes occur in the country, mainly in Tornado Alley. Due to climate change in the country, extreme weather has become more frequent in the U.S. in the 21st century, with three times the number of reported heat waves compared to the 1960s. Since the 1990s, droughts in the American Southwest have become more persistent and more severe. The regions considered as the most attractive to the population are the most vulnerable. The U.S. is one of 17 megadiverse countries containing large numbers of endemic species: about 17,000 species of vascular plants occur in the contiguous United States and Alaska, and over 1,800 species of flowering plants are found in Hawaii, few of which occur on the mainland. The United States is home to 428 mammal species, 784 birds, 311 reptiles, 295 amphibians, and around 91,000 insect species. There are 63 national parks, and hundreds of other federally managed monuments, forests, and wilderness areas, administered by the National Park Service and other agencies. About 28% of the country's land is publicly owned and federally managed, primarily in the Western States. Most of this land is protected, though some is leased for commercial use, and less than one percent is used for military purposes. Environmental issues in the United States include debates on non-renewable resources and nuclear energy, air and water pollution, biodiversity, logging and deforestation, and climate change. The U.S. Environmental Protection Agency (EPA) is the federal agency charged with addressing most environmental-related issues. The idea of wilderness has shaped the management of public lands since 1964, with the Wilderness Act. The Endangered Species Act of 1973 provides a way to protect threatened and endangered species and their habitats. The United States Fish and Wildlife Service implements and enforces the Act. In 2024, the U.S. ranked 35th among 180 countries in the Environmental Performance Index. Government and politics The United States is a federal republic of 50 states and a federal capital district, Washington, D.C. The U.S. asserts sovereignty over five unincorporated territories and several uninhabited island possessions. It is the world's oldest surviving federation, and its presidential system of federal government has been adopted, in whole or in part, by many newly independent states worldwide following their decolonization. The Constitution of the United States serves as the country's supreme legal document. Most scholars describe the United States as a liberal democracy.[r] Composed of three branches, all headquartered in Washington, D.C., the federal government is the national government of the United States. The U.S. Constitution establishes a separation of powers intended to provide a system of checks and balances to prevent any of the three branches from becoming supreme. The three-branch system is known as the presidential system, in contrast to the parliamentary system where the executive is part of the legislative body. Many countries around the world adopted this aspect of the 1789 Constitution of the United States, especially in the postcolonial Americas. In the U.S. federal system, sovereign powers are shared between three levels of government specified in the Constitution: the federal government, the states, and Indian tribes. The U.S. also asserts sovereignty over five permanently inhabited territories: American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands. Residents of the 50 states are governed by their elected state government, under state constitutions compatible with the national constitution, and by elected local governments that are administrative divisions of a state. States are subdivided into counties or county equivalents, and (except for Hawaii) further divided into municipalities, each administered by elected representatives. The District of Columbia is a federal district containing the U.S. capital, Washington, D.C. The federal district is an administrative division of the federal government. Indian country is made up of 574 federally recognized tribes and 326 Indian reservations. They hold a government-to-government relationship with the U.S. federal government in Washington and are legally defined as domestic dependent nations with inherent tribal sovereignty rights. In addition to the five major territories, the U.S. also asserts sovereignty over the United States Minor Outlying Islands in the Pacific Ocean and the Caribbean. The seven undisputed islands without permanent populations are Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, Midway Atoll, and Palmyra Atoll. U.S. sovereignty over the unpopulated Bajo Nuevo Bank, Navassa Island, Serranilla Bank, and Wake Island is disputed. The Constitution is silent on political parties. However, they developed independently in the 18th century with the Federalist and Anti-Federalist parties. Since then, the United States has operated as a de facto two-party system, though the parties have changed over time. Since the mid-19th century, the two main national parties have been the Democratic Party and the Republican Party. The former is perceived as relatively liberal in its political platform while the latter is perceived as relatively conservative in its platform. The United States has an established structure of foreign relations, with the world's second-largest diplomatic corps as of 2024[update]. It is a permanent member of the United Nations Security Council and home to the United Nations headquarters. The United States is a member of the G7, G20, and OECD intergovernmental organizations. Almost all countries have embassies and many have consulates (official representatives) in the country. Likewise, nearly all countries host formal diplomatic missions with the United States, except Iran, North Korea, and Bhutan. Though Taiwan does not have formal diplomatic relations with the U.S., it maintains close unofficial relations. The United States regularly supplies Taiwan with military equipment to deter potential Chinese aggression. Its geopolitical attention also turned to the Indo-Pacific when the United States joined the Quadrilateral Security Dialogue with Australia, India, and Japan. The United States has a "Special Relationship" with the United Kingdom and strong ties with Canada, Australia, New Zealand, the Philippines, Japan, South Korea, Israel, and several European Union countries such as France, Italy, Germany, Spain, and Poland. The U.S. works closely with its NATO allies on military and national security issues, and with countries in the Americas through the Organization of American States and the United States–Mexico–Canada Free Trade Agreement. The U.S. exercises full international defense authority and responsibility for Micronesia, the Marshall Islands, and Palau through the Compact of Free Association. It has increasingly conducted strategic cooperation with India, while its ties with China have steadily deteriorated. Beginning in 2014, the U.S. had become a key ally of Ukraine. After Donald Trump was elected U.S. president in 2024, he sought to negotiate an end to the Russo-Ukrainian War. He paused all military aid to Ukraine in March 2025, although the aid resumed later. Trump also ended U.S. intelligence sharing with the country, but this too was eventually restored. The president is the commander-in-chief of the United States Armed Forces and appoints its leaders, the secretary of defense and the Joint Chiefs of Staff. The Department of Defense, headquartered at the Pentagon near Washington, D.C., administers five of the six service branches, which are made up of the U.S. Army, Marine Corps, Navy, Air Force, and Space Force. The Coast Guard is administered by the Department of Homeland Security in peacetime and can be transferred to the Department of the Navy in wartime. Total strength of the entire military is about 1.3 million active duty with an additional 400,000 in reserve. The United States spent $997 billion on its military in 2024, which is by far the largest amount of any country, making up 37% of global military spending and accounting for 3.4% of the country's GDP. The U.S. possesses 42% of the world's nuclear weapons—the second-largest stockpile after that of Russia. The U.S. military is widely regarded as the most powerful and advanced in the world. The United States has the third-largest combined armed forces in the world, behind the Chinese People's Liberation Army and Indian Armed Forces. The U.S. military operates about 800 bases and facilities abroad, and maintains deployments greater than 100 active duty personnel in 25 foreign countries. The United States has engaged in over 400 military interventions since its founding in 1776, with over half of these occurring between 1950 and 2019 and 25% occurring in the post-Cold War era. State defense forces (SDFs) are military units that operate under the sole authority of a state government. SDFs are authorized by state and federal law but are under the command of the state's governor. By contrast, the 54 U.S. National Guard organizations[t] fall under the dual control of state or territorial governments and the federal government; their units can also become federalized entities, but SDFs cannot be federalized. The National Guard personnel of a state or territory can be federalized by the president under the National Defense Act Amendments of 1933; this legislation created the Guard and provides for the integration of Army National Guard and Air National Guard units and personnel into the U.S. Army and (since 1947) the U.S. Air Force. The total number of National Guard members is about 430,000, while the estimated combined strength of SDFs is less than 10,000. There are about 18,000 U.S. police agencies from local to national level in the United States. Law in the United States is mainly enforced by local police departments and sheriff departments in their municipal or county jurisdictions. The state police departments have authority in their respective state, and federal agencies such as the Federal Bureau of Investigation (FBI) and the U.S. Marshals Service have national jurisdiction and specialized duties, such as protecting civil rights, national security, enforcing U.S. federal courts' rulings and federal laws, and interstate criminal activity. State courts conduct almost all civil and criminal trials, while federal courts adjudicate the much smaller number of civil and criminal cases that relate to federal law. There is no unified "criminal justice system" in the United States. The American prison system is largely heterogenous, with thousands of relatively independent systems operating across federal, state, local, and tribal levels. In 2025, "these systems hold nearly 2 million people in 1,566 state prisons, 98 federal prisons, 3,116 local jails, 1,277 juvenile correctional facilities, 133 immigration detention facilities, and 80 Indian country jails, as well as in military prisons, civil commitment centers, state psychiatric hospitals, and prisons in the U.S. territories." Despite disparate systems of confinement, four main institutions dominate: federal prisons, state prisons, local jails, and juvenile correctional facilities. Federal prisons are run by the Federal Bureau of Prisons and hold pretrial detainees as well as people who have been convicted of federal crimes. State prisons, run by the department of corrections of each state, hold people sentenced and serving prison time (usually longer than one year) for felony offenses. Local jails are county or municipal facilities that incarcerate defendants prior to trial; they also hold those serving short sentences (typically under a year). Juvenile correctional facilities are operated by local or state governments and serve as longer-term placements for any minor adjudicated as delinquent and ordered by a judge to be confined. In January 2023, the United States had the sixth-highest per capita incarceration rate in the world—531 people per 100,000 inhabitants—and the largest prison and jail population in the world, with more than 1.9 million people incarcerated. An analysis of the World Health Organization Mortality Database from 2010 showed U.S. homicide rates "were 7 times higher than in other high-income countries, driven by a gun homicide rate that was 25 times higher". Economy The U.S. has a highly developed mixed economy that has been the world's largest nominally since about 1890. Its 2024 gross domestic product (GDP)[e] of more than $29 trillion constituted over 25% of nominal global economic output, or 15% at purchasing power parity (PPP). From 1983 to 2008, U.S. real compounded annual GDP growth was 3.3%, compared to a 2.3% weighted average for the rest of the G7. The country ranks first in the world by nominal GDP, second when adjusted for purchasing power parities (PPP), and ninth by PPP-adjusted GDP per capita. In February 2024, the total U.S. federal government debt was $34.4 trillion. Of the world's 500 largest companies by revenue, 138 were headquartered in the U.S. in 2025, the highest number of any country. The U.S. dollar is the currency most used in international transactions and the world's foremost reserve currency, backed by the country's dominant economy, its military, the petrodollar system, its large U.S. treasuries market, and its linked eurodollar. Several countries use it as their official currency, and in others it is the de facto currency. The U.S. has free trade agreements with several countries, including the USMCA. Although the United States has reached a post-industrial level of economic development and is often described as having a service economy, it remains a major industrial power; in 2024, the U.S. manufacturing sector was the world's second-largest by value output after China's. New York City is the world's principal financial center, and its metropolitan area is the world's largest metropolitan economy. The New York Stock Exchange and Nasdaq, both located in New York City, are the world's two largest stock exchanges by market capitalization and trade volume. The United States is at the forefront of technological advancement and innovation in many economic fields, especially in artificial intelligence; electronics and computers; pharmaceuticals; and medical, aerospace and military equipment. The country's economy is fueled by abundant natural resources, a well-developed infrastructure, and high productivity. The largest trading partners of the United States are the European Union, Mexico, Canada, China, Japan, South Korea, the United Kingdom, Vietnam, India, and Taiwan. The United States is the world's largest importer and second-largest exporter.[u] It is by far the world's largest exporter of services. Americans have the highest average household and employee income among OECD member states, and the fourth-highest median household income in 2023, up from sixth-highest in 2013. With personal consumption expenditures of over $18.5 trillion in 2023, the U.S. has a heavily consumer-driven economy and is the world's largest consumer market. The U.S. ranked first in the number of dollar billionaires and millionaires in 2023, with 735 billionaires and nearly 22 million millionaires. Wealth in the United States is highly concentrated; in 2011, the richest 10% of the adult population owned 72% of the country's household wealth, while the bottom 50% owned just 2%. U.S. wealth inequality increased substantially since the late 1980s, and income inequality in the U.S. reached a record high in 2019. In 2024, the country had some of the highest wealth and income inequality levels among OECD countries. Since the 1970s, there has been a decoupling of U.S. wage gains from worker productivity. In 2016, the top fifth of earners took home more than half of all income, giving the U.S. one of the widest income distributions among OECD countries. There were about 771,480 homeless persons in the U.S. in 2024. In 2022, 6.4 million children experienced food insecurity. Feeding America estimates that around one in five, or approximately 13 million, children experience hunger in the U.S. and do not know where or when they will get their next meal. Also in 2022, about 37.9 million people, or 11.5% of the U.S. population, were living in poverty. The United States has a smaller welfare state and redistributes less income through government action than most other high-income countries. It is the only advanced economy that does not guarantee its workers paid vacation nationally and one of a few countries in the world without federal paid family leave as a legal right. The United States has a higher percentage of low-income workers than almost any other developed country, largely because of a weak collective bargaining system and lack of government support for at-risk workers. The United States has been a leader in technological innovation since the late 19th century and scientific research since the mid-20th century. Methods for producing interchangeable parts and the establishment of a machine tool industry enabled the large-scale manufacturing of U.S. consumer products in the late 19th century. By the early 20th century, factory electrification, the introduction of the assembly line, and other labor-saving techniques created the system of mass production. In the 21st century, the United States continues to be one of the world's foremost scientific powers, though China has emerged as a major competitor in many fields. The U.S. has the highest research and development expenditures of any country and ranks ninth as a percentage of GDP. In 2022, the United States was (after China) the country with the second-highest number of published scientific papers. In 2021, the U.S. ranked second (also after China) by the number of patent applications, and third by trademark and industrial design applications (after China and Germany), according to World Intellectual Property Indicators. In 2025 the United States ranked third (after Switzerland and Sweden) in the Global Innovation Index. The United States is considered to be a world leader in the development of artificial intelligence technology. In 2023, the United States was ranked the second most technologically advanced country in the world (after South Korea) by Global Finance magazine. The United States has maintained a space program since the late 1950s, beginning with the establishment of the National Aeronautics and Space Administration (NASA) in 1958. NASA's Apollo program (1961–1972) achieved the first crewed Moon landing with the 1969 Apollo 11 mission; it remains one of the agency's most significant milestones. Other major endeavors by NASA include the Space Shuttle program (1981–2011), the Voyager program (1972–present), the Hubble and James Webb space telescopes (launched in 1990 and 2021, respectively), and the multi-mission Mars Exploration Program (Spirit and Opportunity, Curiosity, and Perseverance). NASA is one of five agencies collaborating on the International Space Station (ISS); U.S. contributions to the ISS include several modules, including Destiny (2001), Harmony (2007), and Tranquility (2010), as well as ongoing logistical and operational support. The United States private sector dominates the global commercial spaceflight industry. Prominent American spaceflight contractors include Blue Origin, Boeing, Lockheed Martin, Northrop Grumman, and SpaceX. NASA programs such as the Commercial Crew Program, Commercial Resupply Services, Commercial Lunar Payload Services, and NextSTEP have facilitated growing private-sector involvement in American spaceflight. In 2023, the United States received approximately 84% of its energy from fossil fuel, and its largest source of energy was petroleum (38%), followed by natural gas (36%), renewable sources (9%), coal (9%), and nuclear power (9%). In 2022, the United States constituted about 4% of the world's population, but consumed around 16% of the world's energy. The U.S. ranks as the second-highest emitter of greenhouse gases behind China. The U.S. is the world's largest producer of nuclear power, generating around 30% of the world's nuclear electricity. It also has the highest number of nuclear power reactors of any country. From 2024, the U.S. plans to triple its nuclear power capacity by 2050. The United States' 4 million miles (6.4 million kilometers) of road network, owned almost entirely by state and local governments, is the longest in the world. The extensive Interstate Highway System that connects all major U.S. cities is funded mostly by the federal government but maintained by state departments of transportation. The system is further extended by state highways and some private toll roads. The U.S. is among the top ten countries with the highest vehicle ownership per capita (850 vehicles per 1,000 people) in 2022. A 2022 study found that 76% of U.S. commuters drive alone and 14% ride a bicycle, including bike owners and users of bike-sharing networks. About 11% use some form of public transportation. Public transportation in the United States is well developed in the largest urban areas, notably New York City, Washington, D.C., Boston, Philadelphia, Chicago, and San Francisco; otherwise, coverage is generally less extensive than in most other developed countries. The U.S. also has many relatively car-dependent localities. Long-distance intercity travel is provided primarily by airlines, but travel by rail is more common along the Northeast Corridor, the only high-speed rail in the U.S. that meets international standards. Amtrak, the country's government-sponsored national passenger rail company, has a relatively sparse network compared to that of Western European countries. Service is concentrated in the Northeast, California, the Midwest, the Pacific Northwest, and Virginia/Southeast. The United States has an extensive air transportation network. U.S. civilian airlines are all privately owned. The three largest airlines in the world, by total number of passengers carried, are U.S.-based; American Airlines became the global leader after its 2013 merger with US Airways. Of the 50 busiest airports in the world, 16 are in the United States, as well as five of the top 10. The world's busiest airport by passenger volume is Hartsfield–Jackson Atlanta International in Atlanta, Georgia. In 2022, most of the 19,969 U.S. airports were owned and operated by local government authorities, and there are also some private airports. Some 5,193 are designated as "public use", including for general aviation. The Transportation Security Administration (TSA) has provided security at most major airports since 2001. The country's rail transport network, the longest in the world at 182,412.3 mi (293,564.2 km), handles mostly freight (in contrast to more passenger-centered rail in Europe). Because they are often privately owned operations, U.S. railroads lag behind those of the rest of the world in terms of electrification. The country's inland waterways are the world's fifth-longest, totaling 25,482 mi (41,009 km). They are used extensively for freight, recreation, and a small amount of passenger traffic. Of the world's 50 busiest container ports, four are located in the United States, with the busiest in the country being the Port of Los Angeles. Demographics The U.S. Census Bureau reported 331,449,281 residents on April 1, 2020,[v] making the United States the third-most-populous country in the world, after India and China. The Census Bureau's official 2025 population estimate was 341,784,857, an increase of 3.1% since the 2020 census. According to the Bureau's U.S. Population Clock, on July 1, 2024, the U.S. population had a net gain of one person every 16 seconds, or about 5400 people per day. In 2023, 51% of Americans age 15 and over were married, 6% were widowed, 10% were divorced, and 34% had never been married. In 2023, the total fertility rate for the U.S. stood at 1.6 children per woman, and, at 23%, it had the world's highest rate of children living in single-parent households in 2019. Most Americans live in the suburbs of major metropolitan areas. The United States has a diverse population; 37 ancestry groups have more than one million members. White Americans with ancestry from Europe, the Middle East, or North Africa form the largest racial and ethnic group at 57.8% of the United States population. Hispanic and Latino Americans form the second-largest group and are 18.7% of the United States population. African Americans constitute the country's third-largest ancestry group and are 12.1% of the total U.S. population. Asian Americans are the country's fourth-largest group, composing 5.9% of the United States population. The country's 3.7 million Native Americans account for about 1%, and some 574 native tribes are recognized by the federal government. In 2024, the median age of the United States population was 39.1 years. While many languages and dialects are spoken in the United States, English is by far the most commonly spoken and written. De facto, English is the official language of the United States, and in 2025, Executive Order 14224 declared English official. However, the U.S. has never had a de jure official language, as Congress has never passed a law to designate English as official for all three federal branches. Some laws, such as U.S. naturalization requirements, nonetheless standardize English. Twenty-eight states and the United States Virgin Islands have laws that designate English as the sole official language; 19 states and the District of Columbia have no official language. Three states and four U.S. territories have recognized local or indigenous languages in addition to English: Hawaii (Hawaiian), Alaska (twenty Native languages),[w] South Dakota (Sioux), American Samoa (Samoan), Puerto Rico (Spanish), Guam (Chamorro), and the Northern Mariana Islands (Carolinian and Chamorro). In total, 169 Native American languages are spoken in the United States. In Puerto Rico, Spanish is more widely spoken than English. According to the American Community Survey (2020), some 245.4 million people in the U.S. age five and older spoke only English at home. About 41.2 million spoke Spanish at home, making it the second most commonly used language. Other languages spoken at home by one million people or more include Chinese (3.40 million), Tagalog (1.71 million), Vietnamese (1.52 million), Arabic (1.39 million), French (1.18 million), Korean (1.07 million), and Russian (1.04 million). German, spoken by 1 million people at home in 2010, fell to 857,000 total speakers in 2020. America's immigrant population is by far the world's largest in absolute terms. In 2022, there were 87.7 million immigrants and U.S.-born children of immigrants in the United States, accounting for nearly 27% of the overall U.S. population. In 2017, out of the U.S. foreign-born population, some 45% (20.7 million) were naturalized citizens, 27% (12.3 million) were lawful permanent residents, 6% (2.2 million) were temporary lawful residents, and 23% (10.5 million) were unauthorized immigrants. In 2019, the top countries of origin for immigrants were Mexico (24% of immigrants), India (6%), China (5%), the Philippines (4.5%), and El Salvador (3%). In fiscal year 2022, over one million immigrants (most of whom entered through family reunification) were granted legal residence. The undocumented immigrant population in the U.S. reached a record high of 14 million in 2023. The First Amendment guarantees the free exercise of religion in the country and forbids Congress from passing laws respecting its establishment. Religious practice is widespread, among the most diverse in the world, and profoundly vibrant. The country has the world's largest Christian population, which includes the fourth-largest population of Catholics. Other notable faiths include Judaism, Buddhism, Hinduism, Islam, New Age, and Native American religions. Religious practice varies significantly by region. "Ceremonial deism" is common in American culture. The overwhelming majority of Americans believe in a higher power or spiritual force, engage in spiritual practices such as prayer, and consider themselves religious or spiritual. In the Southern United States' "Bible Belt", evangelical Protestantism plays a significant role culturally; New England and the Western United States tend to be more secular. Mormonism, a Restorationist movement founded in the U.S. in 1847, is the predominant religion in Utah and a major religion in Idaho. About 82% of Americans live in metropolitan areas, particularly in suburbs; about half of those reside in cities with populations over 50,000. In 2022, 333 incorporated municipalities had populations over 100,000, nine cities had more than one million residents, and four cities—New York City, Los Angeles, Chicago, and Houston—had populations exceeding two million. Many U.S. metropolitan populations are growing rapidly, particularly in the South and West. According to the Centers for Disease Control and Prevention (CDC), average U.S. life expectancy at birth reached 79.0 years in 2024, its highest recorded level. This was an increase of 0.6 years over 2023. The CDC attributed the improvement to a significant fall in the number of fatal drug overdoses in the country, noting that "heart disease continues to be the leading cause of death in the United States, followed by cancer and unintentional injuries." In 2024, life expectancy at birth for American men rose to 76.5 years (+0.7 years compared to 2023), while life expectancy for women was 81.4 years (+0.3 years). Starting in 1998, life expectancy in the U.S. fell behind that of other wealthy industrialized countries, and Americans' "health disadvantage" gap has been increasing ever since. The Commonwealth Fund reported in 2020 that the U.S. had the highest suicide rate among high-income countries. Approximately one-third of the U.S. adult population is obese and another third is overweight. The U.S. healthcare system far outspends that of any other country, measured both in per capita spending and as a percentage of GDP, but attains worse healthcare outcomes when compared to peer countries for reasons that are debated. The United States is the only developed country without a system of universal healthcare, and a significant proportion of the population that does not carry health insurance. Government-funded healthcare coverage for the poor (Medicaid) and for those age 65 and older (Medicare) is available to Americans who meet the programs' income or age qualifications. In 2010, then-President Obama passed the Patient Protection and Affordable Care Act.[x] Abortion in the United States is not federally protected, and is illegal or restricted in 17 states. American primary and secondary education, known in the U.S. as K–12 ("kindergarten through 12th grade"), is decentralized. School systems are operated by state, territorial, and sometimes municipal governments and regulated by the U.S. Department of Education. In general, children are required to attend school or an approved homeschool from the age of five or six (kindergarten or first grade) until they are 18 years old. This often brings students through the 12th grade, the final year of a U.S. high school, but some states and territories allow them to leave school earlier, at age 16 or 17. The U.S. spends more on education per student than any other country, an average of $18,614 per year per public elementary and secondary school student in 2020–2021. Among Americans age 25 and older, 92.2% graduated from high school, 62.7% attended some college, 37.7% earned a bachelor's degree, and 14.2% earned a graduate degree. The U.S. literacy rate is near-universal. The U.S. has produced the most Nobel Prize winners of any country, with 411 (having won 413 awards). U.S. tertiary or higher education has earned a global reputation. Many of the world's top universities, as listed by various ranking organizations, are in the United States, including 19 of the top 25. American higher education is dominated by state university systems, although the country's many private universities and colleges enroll about 20% of all American students. Local community colleges generally offer open admissions, lower tuition, and coursework leading to a two-year associate degree or a non-degree certificate. As for public expenditures on higher education, the U.S. spends more per student than the OECD average, and Americans spend more than all nations in combined public and private spending. Colleges and universities directly funded by the federal government do not charge tuition and are limited to military personnel and government employees, including: the U.S. service academies, the Naval Postgraduate School, and military staff colleges. Despite some student loan forgiveness programs in place, student loan debt increased by 102% between 2010 and 2020, and exceeded $1.7 trillion in 2022. Culture and society The United States is home to a wide variety of ethnic groups, traditions, and customs. The country has been described as having the values of individualism and personal autonomy, as well as a strong work ethic and competitiveness. Voluntary altruism towards others also plays a major role; according to a 2016 study by the Charities Aid Foundation, Americans donated 1.44% of total GDP to charity—the highest rate in the world by a large margin. Americans have traditionally been characterized by a unifying political belief in an "American Creed" emphasizing consent of the governed, liberty, equality under the law, democracy, social equality, property rights, and a preference for limited government. The U.S. has acquired significant hard and soft power through its diplomatic influence, economic power, military alliances, and cultural exports such as American movies, music, video games, sports, and food. The influence that the United States exerts on other countries through soft power is referred to as Americanization. Nearly all present Americans or their ancestors came from Europe, Africa, or Asia (the "Old World") within the past five centuries. Mainstream American culture is a Western culture largely derived from the traditions of European immigrants with influences from many other sources, such as traditions brought by slaves from Africa. More recent immigration from Asia and especially Latin America has added to a cultural mix that has been described as a homogenizing melting pot, and a heterogeneous salad bowl, with immigrants contributing to, and often assimilating into, mainstream American culture. Under the First Amendment to the Constitution, the United States is considered to have the strongest protections of free speech of any country. Flag desecration, hate speech, blasphemy, and lese majesty are all forms of protected expression. A 2016 Pew Research Center poll found that Americans were the most supportive of free expression of any polity measured. Additionally, they are the "most supportive of freedom of the press and the right to use the Internet without government censorship". The U.S. is a socially progressive country with permissive attitudes surrounding human sexuality. LGBTQ rights in the United States are among the most advanced by global standards. The American Dream, or the perception that Americans enjoy high levels of social mobility, plays a key role in attracting immigrants. Whether this perception is accurate has been a topic of debate. While mainstream culture holds that the United States is a classless society, scholars identify significant differences between the country's social classes, affecting socialization, language, and values. Americans tend to greatly value socioeconomic achievement, but being ordinary or average is promoted by some as a noble condition as well. The National Foundation on the Arts and the Humanities is an agency of the United States federal government that was established in 1965 with the purpose to "develop and promote a broadly conceived national policy of support for the humanities and the arts in the United States, and for institutions which preserve the cultural heritage of the United States." It is composed of four sub-agencies: Colonial American authors were influenced by John Locke and other Enlightenment philosophers. The American Revolutionary Period (1765–1783) is notable for the political writings of Benjamin Franklin, Alexander Hamilton, Thomas Paine, and Thomas Jefferson. Shortly before and after the Revolutionary War, the newspaper rose to prominence, filling a demand for anti-British national literature. An early novel is William Hill Brown's The Power of Sympathy, published in 1791. Writer and critic John Neal in the early- to mid-19th century helped advance America toward a unique literature and culture by criticizing predecessors such as Washington Irving for imitating their British counterparts, and by influencing writers such as Edgar Allan Poe, who took American poetry and short fiction in new directions. Ralph Waldo Emerson and Margaret Fuller pioneered the influential Transcendentalism movement; Henry David Thoreau, author of Walden, was influenced by this movement. The conflict surrounding abolitionism inspired writers, like Harriet Beecher Stowe, and authors of slave narratives, such as Frederick Douglass. Nathaniel Hawthorne's The Scarlet Letter (1850) explored the dark side of American history, as did Herman Melville's Moby-Dick (1851). Major American poets of the 19th century American Renaissance include Walt Whitman, Melville, and Emily Dickinson. Mark Twain was the first major American writer to be born in the West. Henry James achieved international recognition with novels like The Portrait of a Lady (1881). As literacy rates rose, periodicals published more stories centered around industrial workers, women, and the rural poor. Naturalism, regionalism, and realism were the major literary movements of the period. While modernism generally took on an international character, modernist authors working within the United States more often rooted their work in specific regions, peoples, and cultures. Following the Great Migration to northern cities, African-American and black West Indian authors of the Harlem Renaissance developed an independent tradition of literature that rebuked a history of inequality and celebrated black culture. An important cultural export during the Jazz Age, these writings were a key influence on Négritude, a philosophy emerging in the 1930s among francophone writers of the African diaspora. In the 1950s, an ideal of homogeneity led many authors to attempt to write the Great American Novel, while the Beat Generation rejected this conformity, using styles that elevated the impact of the spoken word over mechanics to describe drug use, sexuality, and the failings of society. Contemporary literature is more pluralistic than in previous eras, with the closest thing to a unifying feature being a trend toward self-conscious experiments with language. Twelve American laureates have won the Nobel Prize in Literature. Media in the United States is broadly uncensored, with the First Amendment providing significant protections, as reiterated in New York Times Co. v. United States. The four major broadcasters in the U.S. are the National Broadcasting Company (NBC), Columbia Broadcasting System (CBS), American Broadcasting Company (ABC), and Fox Broadcasting Company (Fox). The four major broadcast television networks are all commercial entities. The U.S. cable television system offers hundreds of channels catering to a variety of niches. In 2021, about 83% of Americans over age 12 listened to broadcast radio, while about 40% listened to podcasts. In the prior year, there were 15,460 licensed full-power radio stations in the U.S. according to the Federal Communications Commission (FCC). Much of the public radio broadcasting is supplied by National Public Radio (NPR), incorporated in February 1970 under the Public Broadcasting Act of 1967. U.S. newspapers with a global reach and reputation include The Wall Street Journal, The New York Times, The Washington Post, and USA Today. About 800 publications are produced in Spanish. With few exceptions, newspapers are privately owned, either by large chains such as Gannett or McClatchy, which own dozens or even hundreds of newspapers; by small chains that own a handful of papers; or, in an increasingly rare situation, by individuals or families. Major cities often have alternative newspapers to complement the mainstream daily papers, such as The Village Voice in New York City and LA Weekly in Los Angeles. The five most-visited websites in the world are Google, YouTube, Facebook, Instagram, and ChatGPT—all of them American-owned. Other popular platforms used include X (formerly Twitter) and Amazon. In 2025, the U.S. was the world's second-largest video game market by revenue (after China). In 2015, the U.S. video game industry consisted of 2,457 companies that employed around 220,000 jobs and generated $30.4 billion in revenue. There are 444 game publishers, developers, and hardware companies in California alone. According to the Game Developers Conference (GDC), the U.S. is the top location for video game development, with 58% of the world's game developers based there in 2025. The United States is well known for its theater. Mainstream theater in the United States derives from the old European theatrical tradition and has been heavily influenced by the British theater. By the middle of the 19th century, America had created new distinct dramatic forms in the Tom Shows, the showboat theater and the minstrel show. The central hub of the American theater scene is the Theater District in Manhattan, with its divisions of Broadway, off-Broadway, and off-off-Broadway. Many movie and television celebrities have gotten their big break working in New York productions. Outside New York City, many cities have professional regional or resident theater companies that produce their own seasons. The biggest-budget theatrical productions are musicals. U.S. theater has an active community theater culture. The Tony Awards recognizes excellence in live Broadway theater and are presented at an annual ceremony in Manhattan. The awards are given for Broadway productions and performances. One is also given for regional theater. Several discretionary non-competitive awards are given as well, including a Special Tony Award, the Tony Honors for Excellence in Theatre, and the Isabelle Stevenson Award. Folk art in colonial America grew out of artisanal craftsmanship in communities that allowed commonly trained people to individually express themselves. It was distinct from Europe's tradition of high art, which was less accessible and generally less relevant to early American settlers. Cultural movements in art and craftsmanship in colonial America generally lagged behind those of Western Europe. For example, the prevailing medieval style of woodworking and primitive sculpture became integral to early American folk art, despite the emergence of Renaissance styles in England in the late 16th and early 17th centuries. The new English styles would have been early enough to make a considerable impact on American folk art, but American styles and forms had already been firmly adopted. Not only did styles change slowly in early America, but there was a tendency for rural artisans there to continue their traditional forms longer than their urban counterparts did—and far longer than those in Western Europe. The Hudson River School was a mid-19th-century movement in the visual arts tradition of European naturalism. The 1913 Armory Show in New York City, an exhibition of European modernist art, shocked the public and transformed the U.S. art scene. American Realism and American Regionalism sought to reflect and give America new ways of looking at itself. Georgia O'Keeffe, Marsden Hartley, and others experimented with new and individualistic styles, which would become known as American modernism. Major artistic movements such as the abstract expressionism of Jackson Pollock and Willem de Kooning and the pop art of Andy Warhol and Roy Lichtenstein developed largely in the United States. Major photographers include Alfred Stieglitz, Edward Steichen, Dorothea Lange, Edward Weston, James Van Der Zee, Ansel Adams, and Gordon Parks. The tide of modernism and then postmodernism has brought global fame to American architects, including Frank Lloyd Wright, Philip Johnson, and Frank Gehry. The Metropolitan Museum of Art in Manhattan is the largest art museum in the United States and the fourth-largest in the world. American folk music encompasses numerous music genres, variously known as traditional music, traditional folk music, contemporary folk music, or roots music. Many traditional songs have been sung within the same family or folk group for generations, and sometimes trace back to such origins as the British Isles, mainland Europe, or Africa. The rhythmic and lyrical styles of African-American music in particular have influenced American music. Banjos were brought to America through the slave trade. Minstrel shows incorporating the instrument into their acts led to its increased popularity and widespread production in the 19th century. The electric guitar, first invented in the 1930s, and mass-produced by the 1940s, had an enormous influence on popular music, in particular due to the development of rock and roll. The synthesizer, turntablism, and electronic music were also largely developed in the U.S. Elements from folk idioms such as the blues and old-time music were adopted and transformed into popular genres with global audiences. Jazz grew from blues and ragtime in the early 20th century, developing from the innovations and recordings of composers such as W.C. Handy and Jelly Roll Morton. Louis Armstrong and Duke Ellington increased its popularity early in the 20th century. Country music developed in the 1920s, bluegrass and rhythm and blues in the 1940s, and rock and roll in the 1950s. In the 1960s, Bob Dylan emerged from the folk revival to become one of the country's most celebrated songwriters. The musical forms of punk and hip hop both originated in the United States in the 1970s. The United States has the world's largest music market, with a total retail value of $15.9 billion in 2022. Most of the world's major record companies are based in the U.S.; they are represented by the Recording Industry Association of America (RIAA). Mid-20th-century American pop stars, such as Frank Sinatra and Elvis Presley, became global celebrities and best-selling music artists, as have artists of the late 20th century, such as Michael Jackson, Madonna, Whitney Houston, and Mariah Carey, and of the early 21st century, such as Eminem, Britney Spears, Lady Gaga, Katy Perry, Taylor Swift and Beyoncé. The United States has the world's largest apparel market by revenue. Apart from professional business attire, American fashion is eclectic and predominantly informal. Americans' diverse cultural roots are reflected in their clothing; however, sneakers, jeans, T-shirts, and baseball caps are emblematic of American styles. New York, with its Fashion Week, is considered to be one of the "Big Four" global fashion capitals, along with Paris, Milan, and London. A study demonstrated that general proximity to Manhattan's Garment District has been synonymous with American fashion since its inception in the early 20th century. A number of well-known designer labels, among them Tommy Hilfiger, Ralph Lauren, Tom Ford and Calvin Klein, are headquartered in Manhattan. Labels cater to niche markets, such as preteens. New York Fashion Week is one of the most influential fashion shows in the world, and is held twice each year in Manhattan; the annual Met Gala, also in Manhattan, has been called the fashion world's "biggest night". The U.S. film industry has a worldwide influence and following. Hollywood, a district in central Los Angeles, the nation's second-most populous city, is also metonymous for the American filmmaking industry. The major film studios of the United States are the primary source of the most commercially successful movies selling the most tickets in the world. Largely centered in the New York City region from its beginnings in the late 19th century through the first decades of the 20th century, the U.S. film industry has since been primarily based in and around Hollywood. Nonetheless, American film companies have been subject to the forces of globalization in the 21st century, and an increasing number of films are made elsewhere. The Academy Awards, popularly known as "the Oscars", have been held annually by the Academy of Motion Picture Arts and Sciences since 1929, and the Golden Globe Awards have been held annually since January 1944. The industry peaked in what is commonly referred to as the "Golden Age of Hollywood", from the early sound period until the early 1960s, with screen actors such as John Wayne and Marilyn Monroe becoming iconic figures. In the 1970s, "New Hollywood", or the "Hollywood Renaissance", was defined by grittier films influenced by French and Italian realist pictures of the post-war period. The 21st century has been marked by the rise of American streaming platforms, which came to rival traditional cinema. Early settlers were introduced by Native Americans to foods such as turkey, sweet potatoes, corn, squash, and maple syrup. Of the most enduring and pervasive examples are variations of the native dish called succotash. Early settlers and later immigrants combined these with foods they were familiar with, such as wheat flour, beef, and milk, to create a distinctive American cuisine. New World crops, especially pumpkin, corn, potatoes, and turkey as the main course are part of a shared national menu on Thanksgiving, when many Americans prepare or purchase traditional dishes to celebrate the occasion. Characteristic American dishes such as apple pie, fried chicken, doughnuts, french fries, macaroni and cheese, ice cream, hamburgers, hot dogs, and American pizza derive from the recipes of various immigrant groups. Mexican dishes such as burritos and tacos preexisted the United States in areas later annexed from Mexico, and adaptations of Chinese cuisine as well as pasta dishes freely adapted from Italian sources are all widely consumed. American chefs have had a significant impact on society both domestically and internationally. In 1946, the Culinary Institute of America was founded by Katharine Angell and Frances Roth. This would become the United States' most prestigious culinary school, where many of the most talented American chefs would study prior to successful careers. The United States restaurant industry was projected at $899 billion in sales for 2020, and employed more than 15 million people, representing 10% of the nation's workforce directly. It is the country's second-largest private employer and the third-largest employer overall. The United States is home to over 220 Michelin star-rated restaurants, 70 of which are in New York City. Wine has been produced in what is now the United States since the 1500s, with the first widespread production beginning in what is now New Mexico in 1628. In the modern U.S., wine production is undertaken in all fifty states, with California producing 84 percent of all U.S. wine. With more than 1,100,000 acres (4,500 km2) under vine, the United States is the fourth-largest wine-producing country in the world, after Italy, Spain, and France. The classic American diner, a casual restaurant type originally intended for the working class, emerged during the 19th century from converted railroad dining cars made stationary. The diner soon evolved into purpose-built structures whose number expanded greatly in the 20th century. The American fast-food industry developed alongside the nation's car culture. American restaurants developed the drive-in format in the 1920s, which they began to replace with the drive-through format by the 1940s. American fast-food restaurant chains, such as McDonald's, Burger King, Chick-fil-A, Kentucky Fried Chicken, Dunkin' Donuts and many others, have numerous outlets around the world. The most popular spectator sports in the U.S. are American football, basketball, baseball, soccer, and ice hockey. Their premier leagues are, respectively, the National Football League, the National Basketball Association, Major League Baseball, Major League Soccer, and the National Hockey League, All these leagues enjoy wide-ranging domestic media coverage and, except for the MLS, all are considered the preeminent leagues in their respective sports in the world. While most major U.S. sports such as baseball and American football have evolved out of European practices, basketball, volleyball, skateboarding, and snowboarding are American inventions, many of which have become popular worldwide. Lacrosse and surfing arose from Native American and Native Hawaiian activities that predate European contact. The market for professional sports in the United States was approximately $69 billion in July 2013, roughly 50% larger than that of Europe, the Middle East, and Africa combined. American football is by several measures the most popular spectator sport in the United States. Although American football does not have a substantial following in other nations, the NFL does have the highest average attendance (67,254) of any professional sports league in the world. In the year 2024, the NFL generated over $23 billion, making them the most valued professional sports league in the United States and the world. Baseball has been regarded as the U.S. "national sport" since the late 19th century. The most-watched individual sports in the U.S. are golf and auto racing, particularly NASCAR and IndyCar. On the collegiate level, earnings for the member institutions exceed $1 billion annually, and college football and basketball attract large audiences, as the NCAA March Madness tournament and the College Football Playoff are some of the most watched national sporting events. In the U.S., the intercollegiate sports level serves as the main feeder system for professional and Olympic sports, with significant exceptions such as Minor League Baseball. This differs greatly from practices in nearly all other countries, where publicly and privately funded sports organizations serve this function. Eight Olympic Games have taken place in the United States. The 1904 Summer Olympics in St. Louis, Missouri, were the first-ever Olympic Games held outside of Europe. The Olympic Games will be held in the U.S. for a ninth time when Los Angeles hosts the 2028 Summer Olympics. U.S. athletes have won a total of 2,968 medals (1,179 gold) at the Olympic Games, the most of any country. In other international competition, the United States is the home of a number of prestigious events, including the America's Cup, World Baseball Classic, the U.S. Open, and the Masters Tournament. The U.S. men's national soccer team has qualified for eleven World Cups, while the women's national team has won the FIFA Women's World Cup and Olympic soccer tournament four and five times, respectively. The 1999 FIFA Women's World Cup was hosted by the United States. Its final match was attended by 90,185, setting the world record for largest women's sporting event crowd at the time. The United States hosted the 1994 FIFA World Cup and will co-host, along with Canada and Mexico, the 2026 FIFA World Cup. See also Notes References This article incorporates text from a free content work. Licensed under CC BY-SA IGO 3.0 (license statement/permission). Text taken from World Food and Agriculture – Statistical Yearbook 2023, FAO, FAO. External links 40°N 100°W / 40°N 100°W / 40; -100 (United States of America) |
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[SOURCE: https://he.wikipedia.org/wiki/Game_Boy_Advance] | [TOKENS: 3262] |
תוכן עניינים גיים בוי אדוונס 21 במרץ 2001 (יפן) 11 ביוני 2001 (צפון אמריקה) פוקימון אדום 13 מיליון נכון ל-25 בנובמבר 2004 גיים בוי אדוונס (באנגלית: Game Boy Advance; ידוע גם בראשי התיבות GBA) היא קונסולת משחקי ווידאו ניידת, אשר יוצרה ושווקה על ידי חברת המשחקים היפנית נינטנדו. הקונסולה היא הבאה אחרי Game Boy Color בסדרת קונסולות הגיים בוי והראשונה מהקונסולות הניידות של נינטנדו המשתמשת במסך רחב. הקונסולה שוחררה ביפן ב-21 במרץ 2001; באמריקה הצפונית ב-11 ביולי 2001; וברפובליקה העממית של סין ב-8 ביולי 2004 (מלבד הונג קונג). ב-1996 דווח בעיתונות העוסקת בתחום המשחקים על פיתוח גיים בוי חדש, שקיבל את שם הצופן "פרויקט אטלנטיס". מכיוון שלאחר פרסום המידע על "פרויקט אטלנטיס" שווק גיים בוי קולור, היו שסברו בטעות כי זהו פרויקט אטלנטיס, אך מאפייניו הטכניים של הפרויקט כפי שפורסמו בעיתונות תואמים את הגיים בוי אדוונס. דגמים בתחילת שנת 2003 ניטנדו שדרגה את הגיים בוי אדוונס בכך שהוסיפה לו תאורה פנימית מובנית, סוללות נטענות, צג מתקפל ועוד. גודלו של הגיים בוי אדוונס SP היה בערך מחצית מגודלו המקורי של הגיים בוי אדוונס. כל אלה באו לענות על אי הנוחות שבשימוש בגיים בוי אדוונס, בעיקר בגלל צורתו. בנוסף לגיים בוי אדוונס SP יש מסך LCD בהיר יותר. בספטמבר 2005, נינטנדו שחררה חידוש שני לגיים בוי אדוונס. דגם זה הוא גרסה קטנה יותר של הגיים בוי אדוונס, בעלת מסך חד יותר מקודמיו בסדרה, המכונה Game Boy Micro. בנוסף ניתן לקבוע את סוג הצבעים במסך, אך כמו קודמו, גם הוא לא מהווה התקדמות טכנולוגית. ובשונה מהגרסה הרגילה הוא לא מריץ משחקי גיים בוי. פרטים טכניים אביזרים נלווים Wireless Adapter - ה-Wireless Adapter הוא מתאם אלחוטי. הוא שוחרר ב-2004, והתחבר לצידו האחורי של הגיים בוי אדוונס. הוא החליף את הכבל לחיבור בין מכשירים, ומאפשר להרבה מכשירים להתחבר בו זמנית. משום שהוא שוחרר מאוחר לעומת הגיים בוי אדוונס אין הרבה משחקים שמותאמים לו. גרסה מתאימה ל-Game Boy Micro גם שוחררה. Play-Yan - ה-Play-Yan הוא נגן MP3/MPEG4 לגיים בוי אדוונס ולנינטנדו DS. מוזיקה או ווידאו יכולים להישמר בכרטיס SD שלו. פעם נינטנדו איפשרה הורדה של משחקים קטנים לתוך ה-Play-Yan, אך היא הורידה את האפשרות לאחר עדכון גדול בשם Play-Yan Micro. ה-Play-Yan Micro היה מכשיר בסגנון סופר מריו, בניגוד ל-Play-Yan הרגיל. באירופה ה-Play-Yan Micro שוחרר בשם "Nintendo MP3 Player" ואפשר לבחור בסגנון סופר מריו, או בסגנון של ה-Play-Yan המקורי. בניגוד ל-Play-Yan Micro, ה-Nintendo MP3 Player האירופי לא מסוגל להפעיל וידאו. המכשיר לא שוחרר בארצות הברית (אף על פי שהיה אמור להיות משוחרר). e-Reader - ה-e-Reader הוא מכשיר לסריקת כרטיסים אל תוך ה-Game Boy Advance. במשחקים רבים לא נעשה בו שימוש, אך ניתן לראות אותו במיוחד במשחקים חשובים של נינטנדו. הכרטיסים לשימוש ב-e-Reader הם חד- פעמיים לרוב, ואת חלקם ניתן להשיג רק באירועים מיוחדים של נינטנדו. שמו ביפן הוא Card e-Reader, ומסוגל לסרוק אך ורק כרטיסי משחקים. בשל סיבה זאת, שנה לאחר מכן נוצר מעין שדרוג ל-e-Reader, שנקרא Card e+ Reader, שמאפשר בנוסף לסריקת המשחקים, להוסיף תוכן למשחקים (כגון שלבים, יכולות) של הגיים בוי אדוונס. ה-Card e+ Reader הוא ה-e-Reader ששוחרר באמריקה בתור ה-e-reader הרשמי. באירופה, תוסף זה לעולם לא שוחרר. הדוגמה הכי מוכרת למשחק שתומך ב-e-Reader היא Super Mario Advance 4: Super Mario Bros 3. אביזרים לא רשמיים GBAMP - נגן סרטים ל-GBA. המכשיר מאפשר לשחק במשחקי NES, לצפות בסרטים, לקרוא קובצי txt וכו'. המכשיר לא יכול לקרוא קובצי MPEGS או MP3. מכוון טלוויזיה ל-GBA - המכשיר מאפשר לצפות בטלוויזיה דרך הגיים בוי אדוונס. יש כמה גרסאות, מחברות שונות. ניתן לאחסן בו עד ל-99 ערוצים. Game Shark - מכשיר המאפשר לרשום צ'יטים ולהפעילם במשחק. עם זאת, לצ'יטים יש תופעות לוואי כמו הרס השמירה או המשחק עצמו. שיווק ומכירות ב-30 בספטמבר 2006, 76.79 מיליון יחידות של גיים בוי אדוונס נמכרו, מתוכם 39.79 מיליון יחדות של גיים בוי אדוונס SP, ו-1.87 מיליון יחידות של הגיים בוי מיקרו. ב-1 בדצמבר 2006, דיווחה חברת נינטנדו באמריקה על 33.63 יחידות שנמכרו בארצות הברית. מכירות הגיים בוי אדוונס נשארות גבוהות גם לאחר יציאת ה-Nintendo DS, אשר מכר 850,000 יחידות בדצמבר 2006. ראו גם קישורים חיצוניים הערות שוליים |
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[SOURCE: https://en.wikipedia.org/wiki/Mars#cite_note-Hirt2012-12] | [TOKENS: 11899] |
Contents Mars Mars is the fourth planet from the Sun. It is also known as the "Red Planet", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide (CO2). At the average surface level the atmospheric pressure is a few thousandths of Earth's, atmospheric temperature ranges from −153 to 20 °C (−243 to 68 °F), and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps (with seasonal CO2 snow), but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth's or double that of the Moon. Its diameter, 6,779 km (4,212 mi), is about half the Earth's, or twice the Moon's, and its surface area is the size of all the dry land of Earth. Fine dust is prevalent across the surface and the atmosphere, being picked up and spread at the low Martian gravity even by the weak wind of the tenuous atmosphere. The terrain of Mars roughly follows a north-south divide, the Martian dichotomy, with the northern hemisphere mainly consisting of relatively flat, low lying plains, and the southern hemisphere of cratered highlands. Geologically, the planet is fairly active with marsquakes trembling underneath the ground, but also hosts many enormous volcanoes that are extinct (the tallest is Olympus Mons, 21.9 km or 13.6 mi tall), as well as one of the largest canyons in the Solar System (Valles Marineris, 4,000 km or 2,500 mi long). Mars has two natural satellites that are small and irregular in shape: Phobos and Deimos. With a significant axial tilt of 25 degrees, Mars experiences seasons, like Earth (which has an axial tilt of 23.5 degrees). A Martian solar year is equal to 1.88 Earth years (687 Earth days), a Martian solar day (sol) is equal to 24.6 hours. Mars formed along with the other planets approximately 4.5 billion years ago. During the martian Noachian period (4.5 to 3.5 billion years ago), its surface was marked by meteor impacts, valley formation, erosion, the possible presence of water oceans and the loss of its magnetosphere. The Hesperian period (beginning 3.5 billion years ago and ending 3.3–2.9 billion years ago) was dominated by widespread volcanic activity and flooding that carved immense outflow channels. The Amazonian period, which continues to the present, is the currently dominating and remaining influence on geological processes. Because of Mars's geological history, the possibility of past or present life on Mars remains an area of active scientific investigation, with some possible traces needing further examination. Being visible with the naked eye in Earth's sky as a red wandering star, Mars has been observed throughout history, acquiring diverse associations in different cultures. In 1963 the first flight to Mars took place with Mars 1, but communication was lost en route. The first successful flyby exploration of Mars was conducted in 1965 with Mariner 4. In 1971 Mariner 9 entered orbit around Mars, being the first spacecraft to orbit any body other than the Moon, Sun or Earth; following in the same year were the first uncontrolled impact (Mars 2) and first successful landing (Mars 3) on Mars. Probes have been active on Mars continuously since 1997. At times, more than ten probes have simultaneously operated in orbit or on the surface, more than at any other planet beyond Earth. Mars is an often proposed target for future crewed exploration missions, though no such mission is currently planned. Natural history Scientists have theorized that during the Solar System's formation, Mars was created as the result of a random process of run-away accretion of material from the protoplanetary disk that orbited the Sun. Mars has many distinctive chemical features caused by its position in the Solar System. Elements with comparatively low boiling points, such as chlorine, phosphorus, and sulfur, are much more common on Mars than on Earth; these elements were probably pushed outward by the young Sun's energetic solar wind. After the formation of the planets, the inner Solar System may have been subjected to the so-called Late Heavy Bombardment. About 60% of the surface of Mars shows a record of impacts from that era, whereas much of the remaining surface is probably underlain by immense impact basins caused by those events. However, more recent modeling has disputed the existence of the Late Heavy Bombardment. There is evidence of an enormous impact basin in the Northern Hemisphere of Mars, spanning 10,600 by 8,500 kilometres (6,600 by 5,300 mi), or roughly four times the size of the Moon's South Pole–Aitken basin, which would be the largest impact basin yet discovered if confirmed. It has been hypothesized that the basin was formed when Mars was struck by a Pluto-sized body about four billion years ago. The event, thought to be the cause of the Martian hemispheric dichotomy, created the smooth Borealis basin that covers 40% of the planet. A 2023 study shows evidence, based on the orbital inclination of Deimos (a small moon of Mars), that Mars may once have had a ring system 3.5 billion years to 4 billion years ago. This ring system may have been formed from a moon, 20 times more massive than Phobos, orbiting Mars billions of years ago; and Phobos would be a remnant of that ring. Epochs: The geological history of Mars can be split into many periods, but the following are the three primary periods: Geological activity is still taking place on Mars. The Athabasca Valles is home to sheet-like lava flows created about 200 million years ago. Water flows in the grabens called the Cerberus Fossae occurred less than 20 million years ago, indicating equally recent volcanic intrusions. The Mars Reconnaissance Orbiter has captured images of avalanches. Physical characteristics Mars is approximately half the diameter of Earth or twice that of the Moon, with a surface area only slightly less than the total area of Earth's dry land. Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity. Mars is the only presently known example of a desert planet, a rocky planet with a surface akin to that of Earth's deserts. The red-orange appearance of the Martian surface is caused by iron(III) oxide (nanophase Fe2O3) and the iron(III) oxide-hydroxide mineral goethite. It can look like butterscotch; other common surface colors include golden, brown, tan, and greenish, depending on the minerals present. Like Earth, Mars is differentiated into a dense metallic core overlaid by less dense rocky layers. The outermost layer is the crust, which is on average about 42–56 kilometres (26–35 mi) thick, with a minimum thickness of 6 kilometres (3.7 mi) in Isidis Planitia, and a maximum thickness of 117 kilometres (73 mi) in the southern Tharsis plateau. For comparison, Earth's crust averages 27.3 ± 4.8 km in thickness. The most abundant elements in the Martian crust are silicon, oxygen, iron, magnesium, aluminum, calcium, and potassium. Mars is confirmed to be seismically active; in 2019, it was reported that InSight had detected and recorded over 450 marsquakes and related events. Beneath the crust is a silicate mantle responsible for many of the tectonic and volcanic features on the planet's surface. The upper Martian mantle is a low-velocity zone, where the velocity of seismic waves is lower than surrounding depth intervals. The mantle appears to be rigid down to the depth of about 250 km, giving Mars a very thick lithosphere compared to Earth. Below this the mantle gradually becomes more ductile, and the seismic wave velocity starts to grow again. The Martian mantle does not appear to have a thermally insulating layer analogous to Earth's lower mantle; instead, below 1050 km in depth, it becomes mineralogically similar to Earth's transition zone. At the bottom of the mantle lies a basal liquid silicate layer approximately 150–180 km thick. The Martian mantle appears to be highly heterogenous, with dense fragments up to 4 km across, likely injected deep into the planet by colossal impacts ~4.5 billion years ago; high-frequency waves from eight marsquakes slowed as they passed these localized regions, and modeling indicates the heterogeneities are compositionally distinct debris preserved because Mars lacks plate tectonics and has a sluggishly convecting interior that prevents complete homogenization. Mars's iron and nickel core is at least partially molten, and may have a solid inner core. It is around half of Mars's radius, approximately 1650–1675 km, and is enriched in light elements such as sulfur, oxygen, carbon, and hydrogen. The temperature of the core is estimated to be 2000–2400 K, compared to 5400–6230 K for Earth's solid inner core. In 2025, based on data from the InSight lander, a group of researchers reported the detection of a solid inner core 613 kilometres (381 mi) ± 67 kilometres (42 mi) in radius. Mars is a terrestrial planet with a surface that consists of minerals containing silicon and oxygen, metals, and other elements that typically make up rock. The Martian surface is primarily composed of tholeiitic basalt, although parts are more silica-rich than typical basalt and may be similar to andesitic rocks on Earth, or silica glass. Regions of low albedo suggest concentrations of plagioclase feldspar, with northern low albedo regions displaying higher than normal concentrations of sheet silicates and high-silicon glass. Parts of the southern highlands include detectable amounts of high-calcium pyroxenes. Localized concentrations of hematite and olivine have been found. Much of the surface is deeply covered by finely grained iron(III) oxide dust. The Phoenix lander returned data showing Martian soil to be slightly alkaline and containing elements such as magnesium, sodium, potassium and chlorine. These nutrients are found in soils on Earth, and are necessary for plant growth. Experiments performed by the lander showed that the Martian soil has a basic pH of 7.7, and contains 0.6% perchlorate by weight, concentrations that are toxic to humans. Streaks are common across Mars and new ones appear frequently on steep slopes of craters, troughs, and valleys. The streaks are dark at first and get lighter with age. The streaks can start in a tiny area, then spread out for hundreds of metres. They have been seen to follow the edges of boulders and other obstacles in their path. The commonly accepted hypotheses include that they are dark underlying layers of soil revealed after avalanches of bright dust or dust devils. Several other explanations have been put forward, including those that involve water or even the growth of organisms. Environmental radiation levels on the surface are on average 0.64 millisieverts of radiation per day, and significantly less than the radiation of 1.84 millisieverts per day or 22 millirads per day during the flight to and from Mars. For comparison the radiation levels in low Earth orbit, where Earth's space stations orbit, are around 0.5 millisieverts of radiation per day. Hellas Planitia has the lowest surface radiation at about 0.342 millisieverts per day, featuring lava tubes southwest of Hadriacus Mons with potentially levels as low as 0.064 millisieverts per day, comparable to radiation levels during flights on Earth. Although Mars has no evidence of a structured global magnetic field, observations show that parts of the planet's crust have been magnetized, suggesting that alternating polarity reversals of its dipole field have occurred in the past. This paleomagnetism of magnetically susceptible minerals is similar to the alternating bands found on Earth's ocean floors. One hypothesis, published in 1999 and re-examined in October 2005 (with the help of the Mars Global Surveyor), is that these bands suggest plate tectonic activity on Mars four billion years ago, before the planetary dynamo ceased to function and the planet's magnetic field faded. Geography and features Although better remembered for mapping the Moon, Johann Heinrich von Mädler and Wilhelm Beer were the first areographers. They began by establishing that most of Mars's surface features were permanent and by more precisely determining the planet's rotation period. In 1840, Mädler combined ten years of observations and drew the first map of Mars. Features on Mars are named from a variety of sources. Albedo features are named for classical mythology. Craters larger than roughly 50 km are named for deceased scientists and writers and others who have contributed to the study of Mars. Smaller craters are named for towns and villages of the world with populations of less than 100,000. Large valleys are named for the word "Mars" or "star" in various languages; smaller valleys are named for rivers. Large albedo features retain many of the older names but are often updated to reflect new knowledge of the nature of the features. For example, Nix Olympica (the snows of Olympus) has become Olympus Mons (Mount Olympus). The surface of Mars as seen from Earth is divided into two kinds of areas, with differing albedo. The paler plains covered with dust and sand rich in reddish iron oxides were once thought of as Martian "continents" and given names like Arabia Terra (land of Arabia) or Amazonis Planitia (Amazonian plain). The dark features were thought to be seas, hence their names Mare Erythraeum, Mare Sirenum and Aurorae Sinus. The largest dark feature seen from Earth is Syrtis Major Planum. The permanent northern polar ice cap is named Planum Boreum. The southern cap is called Planum Australe. Mars's equator is defined by its rotation, but the location of its Prime Meridian was specified, as was Earth's (at Greenwich), by choice of an arbitrary point; Mädler and Beer selected a line for their first maps of Mars in 1830. After the spacecraft Mariner 9 provided extensive imagery of Mars in 1972, a small crater (later called Airy-0), located in the Sinus Meridiani ("Middle Bay" or "Meridian Bay"), was chosen by Merton E. Davies, Harold Masursky, and Gérard de Vaucouleurs for the definition of 0.0° longitude to coincide with the original selection. Because Mars has no oceans, and hence no "sea level", a zero-elevation surface had to be selected as a reference level; this is called the areoid of Mars, analogous to the terrestrial geoid. Zero altitude was defined by the height at which there is 610.5 Pa (6.105 mbar) of atmospheric pressure. This pressure corresponds to the triple point of water, and it is about 0.6% of the sea level surface pressure on Earth (0.006 atm). For mapping purposes, the United States Geological Survey divides the surface of Mars into thirty cartographic quadrangles, each named for a classical albedo feature it contains. In April 2023, The New York Times reported an updated global map of Mars based on images from the Hope spacecraft. A related, but much more detailed, global Mars map was released by NASA on 16 April 2023. The vast upland region Tharsis contains several massive volcanoes, which include the shield volcano Olympus Mons. The edifice is over 600 km (370 mi) wide. Because the mountain is so large, with complex structure at its edges, giving a definite height to it is difficult. Its local relief, from the foot of the cliffs which form its northwest margin to its peak, is over 21 km (13 mi), a little over twice the height of Mauna Kea as measured from its base on the ocean floor. The total elevation change from the plains of Amazonis Planitia, over 1,000 km (620 mi) to the northwest, to the summit approaches 26 km (16 mi), roughly three times the height of Mount Everest, which in comparison stands at just over 8.8 kilometres (5.5 mi). Consequently, Olympus Mons is either the tallest or second-tallest mountain in the Solar System; the only known mountain which might be taller is the Rheasilvia peak on the asteroid Vesta, at 20–25 km (12–16 mi). The dichotomy of Martian topography is striking: northern plains flattened by lava flows contrast with the southern highlands, pitted and cratered by ancient impacts. It is possible that, four billion years ago, the Northern Hemisphere of Mars was struck by an object one-tenth to two-thirds the size of Earth's Moon. If this is the case, the Northern Hemisphere of Mars would be the site of an impact crater 10,600 by 8,500 kilometres (6,600 by 5,300 mi) in size, or roughly the area of Europe, Asia, and Australia combined, surpassing Utopia Planitia and the Moon's South Pole–Aitken basin as the largest impact crater in the Solar System. Mars is scarred by 43,000 impact craters with a diameter of 5 kilometres (3.1 mi) or greater. The largest exposed crater is Hellas, which is 2,300 kilometres (1,400 mi) wide and 7,000 metres (23,000 ft) deep, and is a light albedo feature clearly visible from Earth. There are other notable impact features, such as Argyre, which is around 1,800 kilometres (1,100 mi) in diameter, and Isidis, which is around 1,500 kilometres (930 mi) in diameter. Due to the smaller mass and size of Mars, the probability of an object colliding with the planet is about half that of Earth. Mars is located closer to the asteroid belt, so it has an increased chance of being struck by materials from that source. Mars is more likely to be struck by short-period comets, i.e., those that lie within the orbit of Jupiter. Martian craters can[discuss] have a morphology that suggests the ground became wet after the meteor impact. The large canyon, Valles Marineris (Latin for 'Mariner Valleys, also known as Agathodaemon in the old canal maps), has a length of 4,000 kilometres (2,500 mi) and a depth of up to 7 kilometres (4.3 mi). The length of Valles Marineris is equivalent to the length of Europe and extends across one-fifth the circumference of Mars. By comparison, the Grand Canyon on Earth is only 446 kilometres (277 mi) long and nearly 2 kilometres (1.2 mi) deep. Valles Marineris was formed due to the swelling of the Tharsis area, which caused the crust in the area of Valles Marineris to collapse. In 2012, it was proposed that Valles Marineris is not just a graben, but a plate boundary where 150 kilometres (93 mi) of transverse motion has occurred, making Mars a planet with possibly a two-tectonic plate arrangement. Images from the Thermal Emission Imaging System (THEMIS) aboard NASA's Mars Odyssey orbiter have revealed seven possible cave entrances on the flanks of the volcano Arsia Mons. The caves, named after loved ones of their discoverers, are collectively known as the "seven sisters". Cave entrances measure from 100 to 252 metres (328 to 827 ft) wide and they are estimated to be at least 73 to 96 metres (240 to 315 ft) deep. Because light does not reach the floor of most of the caves, they may extend much deeper than these lower estimates and widen below the surface. "Dena" is the only exception; its floor is visible and was measured to be 130 metres (430 ft) deep. The interiors of these caverns may be protected from micrometeoroids, UV radiation, solar flares and high energy particles that bombard the planet's surface. Martian geysers (or CO2 jets) are putative sites of small gas and dust eruptions that occur in the south polar region of Mars during the spring thaw. "Dark dune spots" and "spiders" – or araneiforms – are the two most visible types of features ascribed to these eruptions. Similarly sized dust will settle from the thinner Martian atmosphere sooner than it would on Earth. For example, the dust suspended by the 2001 global dust storms on Mars only remained in the Martian atmosphere for 0.6 years, while the dust from Mount Pinatubo took about two years to settle. However, under current Martian conditions, the mass movements involved are generally much smaller than on Earth. Even the 2001 global dust storms on Mars moved only the equivalent of a very thin dust layer – about 3 μm thick if deposited with uniform thickness between 58° north and south of the equator. Dust deposition at the two rover sites has proceeded at a rate of about the thickness of a grain every 100 sols. Atmosphere Mars lost its magnetosphere 4 billion years ago, possibly because of numerous asteroid strikes, so the solar wind interacts directly with the Martian ionosphere, lowering the atmospheric density by stripping away atoms from the outer layer. Both Mars Global Surveyor and Mars Express have detected ionized atmospheric particles trailing off into space behind Mars, and this atmospheric loss is being studied by the MAVEN orbiter. Compared to Earth, the atmosphere of Mars is quite rarefied. Atmospheric pressure on the surface today ranges from a low of 30 Pa (0.0044 psi) on Olympus Mons to over 1,155 Pa (0.1675 psi) in Hellas Planitia, with a mean pressure at the surface level of 600 Pa (0.087 psi). The highest atmospheric density on Mars is equal to that found 35 kilometres (22 mi) above Earth's surface. The resulting mean surface pressure is only 0.6% of Earth's 101.3 kPa (14.69 psi). The scale height of the atmosphere is about 10.8 kilometres (6.7 mi), which is higher than Earth's 6 kilometres (3.7 mi), because the surface gravity of Mars is only about 38% of Earth's. The atmosphere of Mars consists of about 96% carbon dioxide, 1.93% argon and 1.89% nitrogen along with traces of oxygen and water. The atmosphere is quite dusty, containing particulates about 1.5 μm in diameter which give the Martian sky a tawny color when seen from the surface. It may take on a pink hue due to iron oxide particles suspended in it. Despite repeated detections of methane on Mars, there is no scientific consensus as to its origin. One suggestion is that methane exists on Mars and that its concentration fluctuates seasonally. The existence of methane could be produced by non-biological process such as serpentinization involving water, carbon dioxide, and the mineral olivine, which is known to be common on Mars, or by Martian life. Compared to Earth, its higher concentration of atmospheric CO2 and lower surface pressure may be why sound is attenuated more on Mars, where natural sources are rare apart from the wind. Using acoustic recordings collected by the Perseverance rover, researchers concluded that the speed of sound there is approximately 240 m/s for frequencies below 240 Hz, and 250 m/s for those above. Auroras have been detected on Mars. Because Mars lacks a global magnetic field, the types and distribution of auroras there differ from those on Earth; rather than being mostly restricted to polar regions as is the case on Earth, a Martian aurora can encompass the planet. In September 2017, NASA reported radiation levels on the surface of the planet Mars were temporarily doubled, and were associated with an aurora 25 times brighter than any observed earlier, due to a massive, and unexpected, solar storm in the middle of the month. Mars has seasons, alternating between its northern and southern hemispheres, similar to on Earth. Additionally the orbit of Mars has, compared to Earth's, a large eccentricity and approaches perihelion when it is summer in its southern hemisphere and winter in its northern, and aphelion when it is winter in its southern hemisphere and summer in its northern. As a result, the seasons in its southern hemisphere are more extreme and the seasons in its northern are milder than would otherwise be the case. The summer temperatures in the south can be warmer than the equivalent summer temperatures in the north by up to 30 °C (54 °F). Martian surface temperatures vary from lows of about −110 °C (−166 °F) to highs of up to 35 °C (95 °F) in equatorial summer. The wide range in temperatures is due to the thin atmosphere which cannot store much solar heat, the low atmospheric pressure (about 1% that of the atmosphere of Earth), and the low thermal inertia of Martian soil. The planet is 1.52 times as far from the Sun as Earth, resulting in just 43% of the amount of sunlight. Mars has the largest dust storms in the Solar System, reaching speeds of over 160 km/h (100 mph). These can vary from a storm over a small area, to gigantic storms that cover the entire planet. They tend to occur when Mars is closest to the Sun, and have been shown to increase global temperature. Seasons also produce dry ice covering polar ice caps. Hydrology While Mars contains water in larger amounts, most of it is dust covered water ice at the Martian polar ice caps. The volume of water ice in the south polar ice cap, if melted, would be enough to cover most of the surface of the planet with a depth of 11 metres (36 ft). Water in its liquid form cannot persist on the surface due to Mars's low atmospheric pressure, which is less than 1% that of Earth. Only at the lowest of elevations are the pressure and temperature high enough for liquid water to exist for short periods. Although little water is present in the atmosphere, there is enough to produce clouds of water ice and different cases of snow and frost, often mixed with snow of carbon dioxide dry ice. Landforms visible on Mars strongly suggest that liquid water has existed on the planet's surface. Huge linear swathes of scoured ground, known as outflow channels, cut across the surface in about 25 places. These are thought to be a record of erosion caused by the catastrophic release of water from subsurface aquifers, though some of these structures have been hypothesized to result from the action of glaciers or lava. One of the larger examples, Ma'adim Vallis, is 700 kilometres (430 mi) long, much greater than the Grand Canyon, with a width of 20 kilometres (12 mi) and a depth of 2 kilometres (1.2 mi) in places. It is thought to have been carved by flowing water early in Mars's history. The youngest of these channels is thought to have formed only a few million years ago. Elsewhere, particularly on the oldest areas of the Martian surface, finer-scale, dendritic networks of valleys are spread across significant proportions of the landscape. Features of these valleys and their distribution strongly imply that they were carved by runoff resulting from precipitation in early Mars history. Subsurface water flow and groundwater sapping may play important subsidiary roles in some networks, but precipitation was probably the root cause of the incision in almost all cases. Along craters and canyon walls, there are thousands of features that appear similar to terrestrial gullies. The gullies tend to be in the highlands of the Southern Hemisphere and face the Equator; all are poleward of 30° latitude. A number of authors have suggested that their formation process involves liquid water, probably from melting ice, although others have argued for formation mechanisms involving carbon dioxide frost or the movement of dry dust. No partially degraded gullies have formed by weathering and no superimposed impact craters have been observed, indicating that these are young features, possibly still active. Other geological features, such as deltas and alluvial fans preserved in craters, are further evidence for warmer, wetter conditions at an interval or intervals in earlier Mars history. Such conditions necessarily require the widespread presence of crater lakes across a large proportion of the surface, for which there is independent mineralogical, sedimentological and geomorphological evidence. Further evidence that liquid water once existed on the surface of Mars comes from the detection of specific minerals such as hematite and goethite, both of which sometimes form in the presence of water. The chemical signature of water vapor on Mars was first unequivocally demonstrated in 1963 by spectroscopy using an Earth-based telescope. In 2004, Opportunity detected the mineral jarosite. This forms only in the presence of acidic water, showing that water once existed on Mars. The Spirit rover found concentrated deposits of silica in 2007 that indicated wet conditions in the past, and in December 2011, the mineral gypsum, which also forms in the presence of water, was found on the surface by NASA's Mars rover Opportunity. It is estimated that the amount of water in the upper mantle of Mars, represented by hydroxyl ions contained within Martian minerals, is equal to or greater than that of Earth at 50–300 parts per million of water, which is enough to cover the entire planet to a depth of 200–1,000 metres (660–3,280 ft). On 18 March 2013, NASA reported evidence from instruments on the Curiosity rover of mineral hydration, likely hydrated calcium sulfate, in several rock samples including the broken fragments of "Tintina" rock and "Sutton Inlier" rock as well as in veins and nodules in other rocks like "Knorr" rock and "Wernicke" rock. Analysis using the rover's DAN instrument provided evidence of subsurface water, amounting to as much as 4% water content, down to a depth of 60 centimetres (24 in), during the rover's traverse from the Bradbury Landing site to the Yellowknife Bay area in the Glenelg terrain. In September 2015, NASA announced that they had found strong evidence of hydrated brine flows in recurring slope lineae, based on spectrometer readings of the darkened areas of slopes. These streaks flow downhill in Martian summer, when the temperature is above −23 °C, and freeze at lower temperatures. These observations supported earlier hypotheses, based on timing of formation and their rate of growth, that these dark streaks resulted from water flowing just below the surface. However, later work suggested that the lineae may be dry, granular flows instead, with at most a limited role for water in initiating the process. A definitive conclusion about the presence, extent, and role of liquid water on the Martian surface remains elusive. Researchers suspect much of the low northern plains of the planet were covered with an ocean hundreds of meters deep, though this theory remains controversial. In March 2015, scientists stated that such an ocean might have been the size of Earth's Arctic Ocean. This finding was derived from the ratio of protium to deuterium in the modern Martian atmosphere compared to that ratio on Earth. The amount of Martian deuterium (D/H = 9.3 ± 1.7 10−4) is five to seven times the amount on Earth (D/H = 1.56 10−4), suggesting that ancient Mars had significantly higher levels of water. Results from the Curiosity rover had previously found a high ratio of deuterium in Gale Crater, though not significantly high enough to suggest the former presence of an ocean. Other scientists caution that these results have not been confirmed, and point out that Martian climate models have not yet shown that the planet was warm enough in the past to support bodies of liquid water. Near the northern polar cap is the 81.4 kilometres (50.6 mi) wide Korolev Crater, which the Mars Express orbiter found to be filled with approximately 2,200 cubic kilometres (530 cu mi) of water ice. In November 2016, NASA reported finding a large amount of underground ice in the Utopia Planitia region. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior (which is 12,100 cubic kilometers). During observations from 2018 through 2021, the ExoMars Trace Gas Orbiter spotted indications of water, probably subsurface ice, in the Valles Marineris canyon system. Orbital motion Mars's average distance from the Sun is roughly 230 million km (143 million mi), and its orbital period is 687 (Earth) days. The solar day (or sol) on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds. A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours. The gravitational potential difference and thus the delta-v needed to transfer between Mars and Earth is the second lowest for Earth. The axial tilt of Mars is 25.19° relative to its orbital plane, which is similar to the axial tilt of Earth. As a result, Mars has seasons like Earth, though on Mars they are nearly twice as long because its orbital period is that much longer. In the present day, the orientation of the north pole of Mars is close to the star Deneb. Mars has a relatively pronounced orbital eccentricity of about 0.09; of the seven other planets in the Solar System, only Mercury has a larger orbital eccentricity. It is known that in the past, Mars has had a much more circular orbit. At one point, 1.35 million Earth years ago, Mars had an eccentricity of roughly 0.002, much less than that of Earth today. Mars's cycle of eccentricity is 96,000 Earth years compared to Earth's cycle of 100,000 years. Mars has its closest approach to Earth (opposition) in a synodic period of 779.94 days. It should not be confused with Mars conjunction, where the Earth and Mars are at opposite sides of the Solar System and form a straight line crossing the Sun. The average time between the successive oppositions of Mars, its synodic period, is 780 days; but the number of days between successive oppositions can range from 764 to 812. The distance at close approach varies between about 54 and 103 million km (34 and 64 million mi) due to the planets' elliptical orbits, which causes comparable variation in angular size. At their furthest Mars and Earth can be as far as 401 million km (249 million mi) apart. Mars comes into opposition from Earth every 2.1 years. The planets come into opposition near Mars's perihelion in 2003, 2018 and 2035, with the 2020 and 2033 events being particularly close to perihelic opposition. The mean apparent magnitude of Mars is +0.71 with a standard deviation of 1.05. Because the orbit of Mars is eccentric, the magnitude at opposition from the Sun can range from about −3.0 to −1.4. The minimum brightness is magnitude +1.86 when the planet is near aphelion and in conjunction with the Sun. At its brightest, Mars (along with Jupiter) is second only to Venus in apparent brightness. Mars usually appears distinctly yellow, orange, or red. When farthest away from Earth, it is more than seven times farther away than when it is closest. Mars is usually close enough for particularly good viewing once or twice at 15-year or 17-year intervals. Optical ground-based telescopes are typically limited to resolving features about 300 kilometres (190 mi) across when Earth and Mars are closest because of Earth's atmosphere. As Mars approaches opposition, it begins a period of retrograde motion, which means it will appear to move backwards in a looping curve with respect to the background stars. This retrograde motion lasts for about 72 days, and Mars reaches its peak apparent brightness in the middle of this interval. Moons Mars has two relatively small (compared to Earth's) natural moons, Phobos (about 22 km (14 mi) in diameter) and Deimos (about 12 km (7.5 mi) in diameter), which orbit at 9,376 km (5,826 mi) and 23,460 km (14,580 mi) around the planet. The origin of both moons is unclear, although a popular theory states that they were asteroids captured into Martian orbit. Both satellites were discovered in 1877 by Asaph Hall and were named after the characters Phobos (the deity of panic and fear) and Deimos (the deity of terror and dread), twins from Greek mythology who accompanied their father Ares, god of war, into battle. Mars was the Roman equivalent to Ares. In modern Greek, the planet retains its ancient name Ares (Aris: Άρης). From the surface of Mars, the motions of Phobos and Deimos appear different from that of the Earth's satellite, the Moon. Phobos rises in the west, sets in the east, and rises again in just 11 hours. Deimos, being only just outside synchronous orbit – where the orbital period would match the planet's period of rotation – rises as expected in the east, but slowly. Because the orbit of Phobos is below a synchronous altitude, tidal forces from Mars are gradually lowering its orbit. In about 50 million years, it could either crash into Mars's surface or break up into a ring structure around the planet. The origin of the two satellites is not well understood. Their low albedo and carbonaceous chondrite composition have been regarded as similar to asteroids, supporting a capture theory. The unstable orbit of Phobos would seem to point toward a relatively recent capture. But both have circular orbits near the equator, which is unusual for captured objects, and the required capture dynamics are complex. Accretion early in the history of Mars is plausible, but would not account for a composition resembling asteroids rather than Mars itself, if that is confirmed. Mars may have yet-undiscovered moons, smaller than 50 to 100 metres (160 to 330 ft) in diameter, and a dust ring is predicted to exist between Phobos and Deimos. A third possibility for their origin as satellites of Mars is the involvement of a third body or a type of impact disruption. More-recent lines of evidence for Phobos having a highly porous interior, and suggesting a composition containing mainly phyllosilicates and other minerals known from Mars, point toward an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit, similar to the prevailing theory for the origin of Earth's satellite. Although the visible and near-infrared (VNIR) spectra of the moons of Mars resemble those of outer-belt asteroids, the thermal infrared spectra of Phobos are reported to be inconsistent with chondrites of any class. It is also possible that Phobos and Deimos were fragments of an older moon, formed by debris from a large impact on Mars, and then destroyed by a more recent impact upon the satellite. More recently, a study conducted by a team of researchers from multiple countries suggests that a lost moon, at least fifteen times the size of Phobos, may have existed in the past. By analyzing rocks which point to tidal processes on the planet, it is possible that these tides may have been regulated by a past moon. Human observations and exploration The history of observations of Mars is marked by oppositions of Mars when the planet is closest to Earth and hence is most easily visible, which occur every couple of years. Even more notable are the perihelic oppositions of Mars, which are distinguished because Mars is close to perihelion, making it even closer to Earth. The ancient Sumerians named Mars Nergal, the god of war and plague. During Sumerian times, Nergal was a minor deity of little significance, but, during later times, his main cult center was the city of Nineveh. In Mesopotamian texts, Mars is referred to as the "star of judgement of the fate of the dead". The existence of Mars as a wandering object in the night sky was also recorded by the ancient Egyptian astronomers and, by 1534 BCE, they were familiar with the retrograde motion of the planet. By the period of the Neo-Babylonian Empire, the Babylonian astronomers were making regular records of the positions of the planets and systematic observations of their behavior. For Mars, they knew that the planet made 37 synodic periods, or 42 circuits of the zodiac, every 79 years. They invented arithmetic methods for making minor corrections to the predicted positions of the planets. In Ancient Greece, the planet was known as Πυρόεις. Commonly, the Greek name for the planet now referred to as Mars, was Ares. It was the Romans who named the planet Mars, for their god of war, often represented by the sword and shield of the planet's namesake. In the fourth century BCE, Aristotle noted that Mars disappeared behind the Moon during an occultation, indicating that the planet was farther away. Ptolemy, a Greek living in Alexandria, attempted to address the problem of the orbital motion of Mars. Ptolemy's model and his collective work on astronomy was presented in the multi-volume collection later called the Almagest (from the Arabic for "greatest"), which became the authoritative treatise on Western astronomy for the next fourteen centuries. Literature from ancient China confirms that Mars was known by Chinese astronomers by no later than the fourth century BCE. In the East Asian cultures, Mars is traditionally referred to as the "fire star" (火星) based on the Wuxing system. In 1609 Johannes Kepler published a 10 year study of Martian orbit, using the diurnal parallax of Mars, measured by Tycho Brahe, to make a preliminary calculation of the relative distance to the planet. From Brahe's observations of Mars, Kepler deduced that the planet orbited the Sun not in a circle, but in an ellipse. Moreover, Kepler showed that Mars sped up as it approached the Sun and slowed down as it moved farther away, in a manner that later physicists would explain as a consequence of the conservation of angular momentum.: 433–437 In 1610 the first use of a telescope for astronomical observation, including Mars, was performed by Italian astronomer Galileo Galilei. With the telescope the diurnal parallax of Mars was again measured in an effort to determine the Sun-Earth distance. This was first performed by Giovanni Domenico Cassini in 1672. The early parallax measurements were hampered by the quality of the instruments. The only occultation of Mars by Venus observed was that of 13 October 1590, seen by Michael Maestlin at Heidelberg. By the 19th century, the resolution of telescopes reached a level sufficient for surface features to be identified. On 5 September 1877, a perihelic opposition to Mars occurred. The Italian astronomer Giovanni Schiaparelli used a 22-centimetre (8.7 in) telescope in Milan to help produce the first detailed map of Mars. These maps notably contained features he called canali, which, with the possible exception of the natural canyon Valles Marineris, were later shown to be an optical illusion. These canali were supposedly long, straight lines on the surface of Mars, to which he gave names of famous rivers on Earth. His term, which means "channels" or "grooves", was popularly mistranslated in English as "canals". Influenced by the observations, the orientalist Percival Lowell founded an observatory which had 30- and 45-centimetre (12- and 18-in) telescopes. The observatory was used for the exploration of Mars during the last good opportunity in 1894, and the following less favorable oppositions. He published several books on Mars and life on the planet, which had a great influence on the public. The canali were independently observed by other astronomers, like Henri Joseph Perrotin and Louis Thollon in Nice, using one of the largest telescopes of that time. The seasonal changes (consisting of the diminishing of the polar caps and the dark areas formed during Martian summers) in combination with the canals led to speculation about life on Mars, and it was a long-held belief that Mars contained vast seas and vegetation. As bigger telescopes were used, fewer long, straight canali were observed. During observations in 1909 by Antoniadi with an 84-centimetre (33 in) telescope, irregular patterns were observed, but no canali were seen. The first spacecraft from Earth to visit Mars was Mars 1 of the Soviet Union, which flew by in 1963, but contact was lost en route. NASA's Mariner 4 followed and became the first spacecraft to successfully transmit from Mars; launched on 28 November 1964, it made its closest approach to the planet on 15 July 1965. Mariner 4 detected the weak Martian radiation belt, measured at about 0.1% that of Earth, and captured the first images of another planet from deep space. Once spacecraft visited the planet during the 1960s and 1970s, many previous concepts of Mars were radically broken. After the results of the Viking life-detection experiments, the hypothesis of a dead planet was generally accepted. The data from Mariner 9 and Viking allowed better maps of Mars to be made. Until 1997 and after Viking 1 shut down in 1982, Mars was only visited by three unsuccessful probes, two flying past without contact (Phobos 1, 1988; Mars Observer, 1993), and one (Phobos 2 1989) malfunctioning in orbit before reaching its destination Phobos. In 1997 Mars Pathfinder became the first successful rover mission beyond the Moon and started together with Mars Global Surveyor (operated until late 2006) an uninterrupted active robotic presence at Mars that has lasted until today. It produced complete, extremely detailed maps of the Martian topography, magnetic field and surface minerals. Starting with these missions a range of new improved crewless spacecraft, including orbiters, landers, and rovers, have been sent to Mars, with successful missions by the NASA (United States), Jaxa (Japan), ESA, United Kingdom, ISRO (India), Roscosmos (Russia), the United Arab Emirates, and CNSA (China) to study the planet's surface, climate, and geology, uncovering the different elements of the history and dynamic of the hydrosphere of Mars and possible traces of ancient life. As of 2023[update], Mars is host to ten functioning spacecraft. Eight are in orbit: 2001 Mars Odyssey, Mars Express, Mars Reconnaissance Orbiter, MAVEN, ExoMars Trace Gas Orbiter, the Hope orbiter, and the Tianwen-1 orbiter. Another two are on the surface: the Mars Science Laboratory Curiosity rover and the Perseverance rover. Collected maps are available online at websites including Google Mars. NASA provides two online tools: Mars Trek, which provides visualizations of the planet using data from 50 years of exploration, and Experience Curiosity, which simulates traveling on Mars in 3-D with Curiosity. Planned missions to Mars include: As of February 2024[update], debris from these types of missions has reached over seven tons. Most of it consists of crashed and inactive spacecraft as well as discarded components. In April 2024, NASA selected several companies to begin studies on providing commercial services to further enable robotic science on Mars. Key areas include establishing telecommunications, payload delivery and surface imaging. Habitability and habitation During the late 19th century, it was widely accepted in the astronomical community that Mars had life-supporting qualities, including the presence of oxygen and water. However, in 1894 W. W. Campbell at Lick Observatory observed the planet and found that "if water vapor or oxygen occur in the atmosphere of Mars it is in quantities too small to be detected by spectroscopes then available". That observation contradicted many of the measurements of the time and was not widely accepted. Campbell and V. M. Slipher repeated the study in 1909 using better instruments, but with the same results. It was not until the findings were confirmed by W. S. Adams in 1925 that the myth of the Earth-like habitability of Mars was finally broken. However, even in the 1960s, articles were published on Martian biology, putting aside explanations other than life for the seasonal changes on Mars. The current understanding of planetary habitability – the ability of a world to develop environmental conditions favorable to the emergence of life – favors planets that have liquid water on their surface. Most often this requires the orbit of a planet to lie within the habitable zone, which for the Sun is estimated to extend from within the orbit of Earth to about that of Mars. During perihelion, Mars dips inside this region, but Mars's thin (low-pressure) atmosphere prevents liquid water from existing over large regions for extended periods. The past flow of liquid water demonstrates the planet's potential for habitability. Recent evidence has suggested that any water on the Martian surface may have been too salty and acidic to support regular terrestrial life. The environmental conditions on Mars are a challenge to sustaining organic life: the planet has little heat transfer across its surface, it has poor insulation against bombardment by the solar wind due to the absence of a magnetosphere and has insufficient atmospheric pressure to retain water in a liquid form (water instead sublimes to a gaseous state). Mars is nearly, or perhaps totally, geologically dead; the end of volcanic activity has apparently stopped the recycling of chemicals and minerals between the surface and interior of the planet. Evidence suggests that the planet was once significantly more habitable than it is today, but whether living organisms ever existed there remains unknown. The Viking probes of the mid-1970s carried experiments designed to detect microorganisms in Martian soil at their respective landing sites and had positive results, including a temporary increase in CO2 production on exposure to water and nutrients. This sign of life was later disputed by scientists, resulting in a continuing debate, with NASA scientist Gilbert Levin asserting that Viking may have found life. A 2014 analysis of Martian meteorite EETA79001 found chlorate, perchlorate, and nitrate ions in sufficiently high concentrations to suggest that they are widespread on Mars. UV and X-ray radiation would turn chlorate and perchlorate ions into other, highly reactive oxychlorines, indicating that any organic molecules would have to be buried under the surface to survive. Small quantities of methane and formaldehyde detected by Mars orbiters are both claimed to be possible evidence for life, as these chemical compounds would quickly break down in the Martian atmosphere. Alternatively, these compounds may instead be replenished by volcanic or other geological means, such as serpentinite. Impact glass, formed by the impact of meteors, which on Earth can preserve signs of life, has also been found on the surface of the impact craters on Mars. Likewise, the glass in impact craters on Mars could have preserved signs of life, if life existed at the site. The Cheyava Falls rock discovered on Mars in June 2024 has been designated by NASA as a "potential biosignature" and was core sampled by the Perseverance rover for possible return to Earth and further examination. Although highly intriguing, no definitive final determination on a biological or abiotic origin of this rock can be made with the data currently available. Several plans for a human mission to Mars have been proposed, but none have come to fruition. The NASA Authorization Act of 2017 directed NASA to study the feasibility of a crewed Mars mission in the early 2030s; the resulting report concluded that this would be unfeasible. In addition, in 2021, China was planning to send a crewed Mars mission in 2033. Privately held companies such as SpaceX have also proposed plans to send humans to Mars, with the eventual goal to settle on the planet. As of 2024, SpaceX has proceeded with the development of the Starship launch vehicle with the goal of Mars colonization. In plans shared with the company in April 2024, Elon Musk envisions the beginning of a Mars colony within the next twenty years. This would be enabled by the planned mass manufacturing of Starship and initially sustained by resupply from Earth, and in situ resource utilization on Mars, until the Mars colony reaches full self sustainability. Any future human mission to Mars will likely take place within the optimal Mars launch window, which occurs every 26 months. The moon Phobos has been proposed as an anchor point for a space elevator. Besides national space agencies and space companies, groups such as the Mars Society and The Planetary Society advocate for human missions to Mars. In culture Mars is named after the Roman god of war (Greek Ares), but was also associated with the demi-god Heracles (Roman Hercules) by ancient Greek astronomers, as detailed by Aristotle. This association between Mars and war dates back at least to Babylonian astronomy, in which the planet was named for the god Nergal, deity of war and destruction. It persisted into modern times, as exemplified by Gustav Holst's orchestral suite The Planets, whose famous first movement labels Mars "The Bringer of War". The planet's symbol, a circle with a spear pointing out to the upper right, is also used as a symbol for the male gender. The symbol dates from at least the 11th century, though a possible predecessor has been found in the Greek Oxyrhynchus Papyri. The idea that Mars was populated by intelligent Martians became widespread in the late 19th century. Schiaparelli's "canali" observations combined with Percival Lowell's books on the subject put forward the standard notion of a planet that was a drying, cooling, dying world with ancient civilizations constructing irrigation works. Many other observations and proclamations by notable personalities added to what has been termed "Mars Fever". In the present day, high-resolution mapping of the surface of Mars has revealed no artifacts of habitation, but pseudoscientific speculation about intelligent life on Mars still continues. Reminiscent of the canali observations, these speculations are based on small scale features perceived in the spacecraft images, such as "pyramids" and the "Face on Mars". In his book Cosmos, planetary astronomer Carl Sagan wrote: "Mars has become a kind of mythic arena onto which we have projected our Earthly hopes and fears." The depiction of Mars in fiction has been stimulated by its dramatic red color and by nineteenth-century scientific speculations that its surface conditions might support not just life but intelligent life. This gave way to many science fiction stories involving these concepts, such as H. G. Wells's The War of the Worlds, in which Martians seek to escape their dying planet by invading Earth; Ray Bradbury's The Martian Chronicles, in which human explorers accidentally destroy a Martian civilization; as well as Edgar Rice Burroughs's series Barsoom, C. S. Lewis's novel Out of the Silent Planet (1938), and a number of Robert A. Heinlein stories before the mid-sixties. Since then, depictions of Martians have also extended to animation. A comic figure of an intelligent Martian, Marvin the Martian, appeared in Haredevil Hare (1948) as a character in the Looney Tunes animated cartoons of Warner Brothers, and has continued as part of popular culture to the present. After the Mariner and Viking spacecraft had returned pictures of Mars as a lifeless and canal-less world, these ideas about Mars were abandoned; for many science-fiction authors, the new discoveries initially seemed like a constraint, but eventually the post-Viking knowledge of Mars became itself a source of inspiration for works like Kim Stanley Robinson's Mars trilogy. See also Notes References Further reading External links Solar System → Local Interstellar Cloud → Local Bubble → Gould Belt → Orion Arm → Milky Way → Milky Way subgroup → Local Group → Local Sheet → Local Volume → Virgo Supercluster → Laniakea Supercluster → Pisces–Cetus Supercluster Complex → Local Hole → Observable universe → UniverseEach arrow (→) may be read as "within" or "part of". |
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[SOURCE: https://en.wikipedia.org/wiki/Night_sky] | [TOKENS: 2082] |
Contents Night sky The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight, starlight, and airglow, depending on location and timing. Aurorae light up the skies above the polar circles. Occasionally, a large coronal mass ejection from the Sun or simply high levels of solar wind may extend the phenomenon toward the Equator. The night sky and studies of it have a historical place in both ancient and modern cultures. In the past, for instance, farmers have used the status of the night sky as a calendar to determine when to plant crops. Many cultures have drawn constellations between stars in the sky, using them in association with legends and mythology about their deities. The history of astrology has generally been based on the belief that relationships between heavenly bodies influence or explain events on Earth. The scientific study of objects in the night sky takes place in the context of observational astronomy. Visibility of celestial objects in the night sky is affected by light pollution. The presence of the Moon in the night sky has historically hindered astronomical observation by increasing the amount of sky brightness. With the advent of artificial light sources, however, light pollution has been a growing problem for viewing the night sky. Optical filters and modifications to light fixtures can help to alleviate this problem, but for optimal views, both professional and amateur astronomers seek locations far from urban skyglow. Brightness The fact that the sky is not completely dark at night, even in the absence of moonlight and city lights, can be easily observed, since if the sky were absolutely dark, one would not be able to see the silhouette of an object against the sky. The intensity of the sky brightness varies greatly over the day and the primary cause differs as well. During daytime when the Sun is above the horizon direct scattering of sunlight (Rayleigh scattering) is the overwhelmingly dominant source of light. In twilight, the period of time between sunset and sunrise, the situation is more complicated and a further differentiation is required. Twilight is divided in three segments according to how far the Sun is below the horizon in segments of 6°. After sunset, civil twilight sets in and ends when the Sun drops more than 6° below the horizon. This is then followed by nautical twilight, when the Sun reaches heights of −6° and −12°, after which comes astronomical twilight defined as the period from −12° to −18°. When the Sun drops more than 18° below the horizon, the sky generally attains its minimum brightness. Several sources can be identified as the source of the intrinsic brightness of the sky, namely airglow, indirect scattering of sunlight, scattering of starlight, and artificial light pollution. Visual presentation Depending on local sky cloud cover, pollution, humidity, and light pollution levels, the stars visible to the unaided naked eye appear as hundreds, thousands or tens of thousands of white pinpoints of light in an otherwise near black sky together with some faint nebulae or clouds of light. In ancient times the stars were often assumed to be equidistant on a dome above the Earth because they are much too far away for stereopsis to offer any depth cues. Visible stars range in color from blue (hot) to red (cold), but with such small points of faint light, most look white because they stimulate the rod cells without triggering the cone cells. If it is particularly dark and a particularly faint celestial object is of interest, averted vision may be helpful. The stars of the night sky cannot be counted unaided because they are so numerous and there is no way to track which have been counted and which have not. Further complicating the count, fainter stars may appear and disappear depending on exactly where the observer is looking. The result is an impression of an extraordinarily vast star field. Because stargazing is best done from a dark place away from city lights, dark adaptation is important to achieve and maintain. It takes several minutes for eyes to adjust to the darkness necessary for seeing the most stars, and surroundings on the ground are hard to discern. A red flashlight can be used to illuminate star charts and telescope parts without undoing the dark adaptation. Star charts are produced to aid stargazers in identifying constellations and other celestial objects. Constellations are prominent because their stars tend to be brighter than other nearby stars in the sky. Different cultures have created different groupings of constellations based on differing interpretations of the more-or-less random patterns of dots in the sky. Constellations were identified without regard to distance to each star, but instead as if they were all dots on a dome. Orion is among the most prominent and recognizable constellations. The Big Dipper (which has a wide variety of other names) is helpful for navigation in the northern hemisphere because it points to Polaris, the north star. The pole stars are special because they are approximately in line with the Earth's axis of rotation so they appear to stay in one place while the other stars rotate around them through the course of a night (or a year). Planets, named for the Greek word for 'wanderer', process through the starfield a little each day, executing loops with time scales dependent on the length of the planet's year or orbital period around the Sun. Planets, to the naked eye, appear as points of light in the sky with variable brightness. Planets shine due to sunlight reflecting or scattering from the planets' surface or atmosphere. Thus, the relative Sun-planet-Earth positions determine the planet's brightness. With a telescope or good binoculars, the planets appear as discs demonstrating finite size, and it is possible to observe orbiting moons which cast shadows onto the host planet's surface. Venus is the most prominent planet, often called the "morning star" or "evening star" because it is brighter than the stars and often the only "star" visible near sunrise or sunset, depending on its location in its orbit. Because of its brightness, Venus can sometimes be seen after sunrise. Mercury, Mars, Jupiter and Saturn are also visible to the naked eye in the night sky. The Moon appears as a grey disc in the sky with cratering visible to the naked eye. It spans, depending on its exact location, 29–33 arcminutes – which is about the size of a thumbnail at arm's length, and is readily identified. Over 29.53 days on average, the moon goes through a full cycle of lunar phases. People can generally identify phases within a few days by looking at the Moon. Unlike stars and most planets, the light reflected from the Moon is bright enough to be seen during the day. Some of the most spectacular moons come during the full moon phase near sunset or sunrise. The Moon on the horizon benefits from the Moon illusion which makes it appear larger. The Sun's light reflected from the Moon traveling through the atmosphere also appears to color the Moon orange and/or red. Comets come to the night sky only rarely. Comets are illuminated by the Sun, and their tails extend away from the Sun. A comet with a visible tail is quite unusual – a great comet appears about once a decade. They tend to be visible only shortly before sunrise or after sunset because those are the times they are close enough to the Sun to show a tail. Clouds obscure the view of other objects in the sky, though varying thicknesses of cloud cover have differing effects. A very thin cirrus cloud in front of the moon might produce a rainbow-colored ring around the moon. Stars and planets are too small or dim to take on this effect and are instead only dimmed (often to the point of invisibility). Thicker cloud cover obscures celestial objects entirely, making the sky black or reflecting city lights back down. Clouds are often close enough to afford some depth perception, though they are hard to see without moonlight or light pollution. On clear dark nights in unpolluted areas, when the Moon appears thin or below the horizon, the Milky Way, a band of what looks like white dust, can be seen. The Magellanic Clouds of the southern sky are easily mistaken to be Earth-based clouds (hence the name) but are in fact collections of stars found outside the Milky Way known as dwarf galaxies. Zodiacal light is a glow that appears near the points where the Sun rises and sets, and is caused by sunlight interacting with interplanetary dust. Gegenschein is a faint bright spot in the night sky centered at the antisolar point, caused by the backscatter of sunlight by interplanetary dust. Shortly after sunset and before sunrise, artificial satellites often look like stars – similar in brightness and size – but move relatively quickly. Those that fly in low Earth orbit cross the sky in a couple of minutes. Some satellites, including space debris, appear to blink or have a periodic fluctuation in brightness because they are rotating. Satellite flares can appear brighter than Venus, with notable examples including the International Space Station (ISS) and Iridium Satellites. Meteors streak across the sky infrequently. During a meteor shower, they may average one a minute at irregular intervals, but otherwise their appearance is a random surprise. The occasional meteor will make a bright, fleeting streak across the sky, and they can be very bright in comparison to the night sky. Aircraft are also visible at night, distinguishable at a distance from other objects because their navigation lights blink. Sky map Future and past Beside the Solar System objects changing in the course of them and Earth orbiting and changing orbits over time around the Sun and in the case of the Moon around Earth, appearing over time smaller by expanding its orbit, the night sky also changes over the course of the years with stars having a proper motion and changing brightness because of being variable stars, by the distance to them getting larger or other celestial events like supernovas. Over a timescale of tens of billions of years the night sky in the Local Group will significantly change when the coalescence of the Andromeda Galaxy and the Milky Way merge into a single elliptical galaxy. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Moment_of_inertia_factor] | [TOKENS: 597] |
Contents Moment of inertia factor In planetary sciences, the moment of inertia factor or normalized polar moment of inertia is a dimensionless quantity that characterizes the radial distribution of mass inside a planet or satellite. Since a moment of inertia has dimensions of mass times length squared, the moment of inertia factor is the coefficient that multiplies these. Definition For a planetary body with principal moments of inertia A < B < C, the moment of inertia factor is defined as C M R 2 , {\displaystyle {\frac {C}{MR^{2}}}\,,} where C is the first principal moment of inertia of the body, M is the mass of the body, and R is the mean radius of the body. For a sphere with uniform density, C/MR2 = 2/5 (i.e., 0.4).[note 1][note 2] For a differentiated planet or satellite, where there is an increase of density with depth, C/MR2 < 0.4. The quantity is a useful indicator of the presence and extent of a planetary core, because a greater departure from the uniform-density value of 0.4 conveys a greater degree of concentration of dense materials towards the center. Solar System values The Sun has by far the lowest moment of inertia factor value among Solar System bodies; it has by far the highest central density (162 g/cm3,[note 3] compared to ~13 g/cm3 for Earth) and a relatively low average density (1.41 g/cm3, versus Earth's average density of 5.5 g/cm3). Saturn has the lowest value among the gas giants in part because it has the lowest bulk density (0.687 g/cm3). Ganymede has the lowest moment of inertia factor among solid bodies in the Solar System because of its fully differentiated interior, a result in part of tidal heating due to the Laplace resonance, as well as its substantial component of low density water ice. Callisto is similar in size and bulk composition to Ganymede, but is not part of the orbital resonance and is less differentiated. The Moon is thought to have a small core, but its interior is otherwise relatively homogenous. Measurement The polar moment of inertia is traditionally determined by combining measurements of spin quantities (spin precession rate and/or obliquity) with gravity quantities (coefficients of a spherical harmonic representation of the gravity field). These geodetic data usually require an orbiting spacecraft to collect. Approximation For bodies in hydrostatic equilibrium, the Darwin–Radau relation can provide estimates of the moment of inertia factor on the basis of shape, spin, and gravity quantities. Role in interior models The moment of inertia factor provides an important constraint for models representing the interior structure of a planet or satellite. At a minimum, acceptable models of the density profile must match the volumetric mass density and moment of inertia factor of the body. Gallery of internal structure models Notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Processing_element] | [TOKENS: 143] |
Glossary of computer hardware terms This glossary of computer hardware terms is a list of definitions of terms and concepts related to computer hardware, i.e. the physical and structural components of computers, architectural issues, and peripheral devices. A B C Also chip set. Also chassis, cabinet, box, tower, enclosure, housing, system unit, or simply case. Also simply PCI. D Also Digital Versatile Disc. E F G H I Also chip. J K L M N Also LAN card or network card. O P R S Also solid-state disk or electronic disk. Also audio card. Also Serial AT Attachment. T Also trackpad. U V Also graphics card. W Z See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Medical_sociology] | [TOKENS: 3701] |
Contents Medical sociology Medical sociology is the sociological analysis of health, Illness, differential access to medical resources, the social organization of medicine, Health Care Delivery, the production of medical knowledge, selection of methods, the study of actions and interactions of healthcare professionals, and the social or cultural (rather than clinical or bodily) effects of medical practice. The field commonly interacts with the sociology of knowledge, science and technology studies, and social epistemology. Medical sociologists are also interested in the qualitative experiences of patients, doctors, and medical education; often working at the boundaries of public health, social work, demography and gerontology to explore phenomena at the intersection of the social and clinical sciences. Health disparities commonly relate to typical categories such as class, race, ethnicity, immigration, gender, sexuality, and age. Objective sociological research findings quickly become a normative and political issue. Early work in medical sociology was conducted by Lawrence J Henderson whose theoretical interests in the work of Vilfredo Pareto inspired Talcott Parsons' interests in sociological systems theory. Parsons is one of the founding fathers of medical sociology, and applied social role theory to interactional relations between sick people and others. Later other sociologists such as Eliot Freidson have taken a conflict theory perspective, looking at how the medical profession secures its own interests.: 291 Key contributors to medical sociology since the 1950s include Howard S. Becker, Mike Bury, Peter Conrad, Jack Douglas, Eliot Freidson, David Silverman, Phil Strong, Bernice Pescosolido, Carl May, Anne Rogers, Anselm Strauss, Renee Fox, and Joseph W. Schneider. The field of medical sociology is usually taught as part of a wider sociology, clinical psychology or health studies degree course, or on dedicated master's degree courses where it is sometimes combined with the study of medical ethics and bioethics. In Britain, sociology was introduced into the medical curriculum following the Goodenough report in 1944: "In medicine, 'social explanations' of the etiology of disease meant for some doctors a redirection of medical thought from the purely clinical and psychological criteria of illness. The introduction of 'social' factors into medical explanation was most strongly evidenced in branches of medicine closely related to the community — Social Medicine and, later, General Practice". History Samuel W. Bloom argues that the study of medical sociology has a long history but tended to be done as one of advocacy in response to social events rather than a field of study. He cites the 1842 publication of the sanitary conditions of the labouring population of Great Britain as a good example of such research. This medical sociology included an element of social science, studying social structures as a cause or mediating factor in disease, such as for public health or social medicine.: 11 Bloom argues the development of medical sociology is linked to the development of sociology within American universities. He argues that the 1865 creation of the American Social Science Association (ASSA) was a key event in this development.: 25 ASSA's initial aim was policy reform on the basis of science.: 25 Bloom argues that over the next few decades the role of ASSA moved from advocacy to academic discipline, noting that a number of academic professional bodies broke away from the ASSA during this period, starting with the American Historical Association in 1884. The American Sociological Society formed in 1905.: 26 The Russell Sage Foundation, formed in 1907, was a large philanthropic organization which worked closely with the American Sociological Society, which had medical sociology as a primary focus of its suggested policy reform.: 36 Bloom argues that the presidency of Donald R Young, a professor of sociology, that started in 1947 was significant in the development of medical sociology.: 182 Young motivated by a desire to legitimize sociology, encouraged Esther Lucile Brown, an anthropologist who studied the professions, to focus her work on the medical professions due to medicine's societal status.: 183 Harry Stack Sullivan was a psychiatrist who investigated the treatment of schizophrenia using approaches of interpersonal psychotherapy working with sociologists and social scientists including Lawrence K. Frank, W. I. Thomas, Ruth Benedict, Harold Lasswell and Edward Sapir.: 76 Bloom argues that Sullivans work, and its focus on putative interpersonal causes and treatment of schizophrenia influenced ethnographic study of the hospital setting.: 76 Medical profession The profession of medicine has been studied by sociologists. Talcott Parsons looked at the profession from a functionalist perspective, focusing on medics roles as experts, their altruism, and how they support communities. Other sociologists have taken a conflict theory perspective, looking at how the medical profession secures its own interests. Of these, Marxist conflict theory perspective considers how the ruling classes can enact power through medicine, while other theories propose a more structural pluralist approach, exemplified by Eliot Freidson, looking at how the professions themselves secure influence.: 291 The study of medical education has been a central part of medical sociology since its emergence in the 1950s. The first publication on the topic was Robert Merton's The Student Physician. Other scholars who studied the field include Howard S. Becker, with his publication Boys in White.: 1 The hidden curriculum is a concept in medical education that refers to a distinction between what is officially taught and what is learned by a medical student.: 16 The concept was introduced by Philip W. Jackson in his book Life in the Classroom, but developed further by Benson Snyder. The concept has been criticised by Lakomski and there has been considerable debate on the concepts within the educational community.: 17 Writing the 1970s, Eliot Freidson argued that medicine had reached a point of "professional dominance" over the content of their work, other health professions and their clients by convincing the public of medicine's effectiveness, gaining a legal monopoly over their work, and appropriating other "medical" knowledge through control of training.: 433 This concept of dominance has been extended to professions as a whole in closure theory, where professions are seen as competing for scope of practice, for example in the work of Andrew Abbott.: 434 Coburn argues that academic interest in medical dominance has decreased over time due to the increased role of capitalism in healthcare in the US,: 436 challenges to the control of health policy by politicians, economists and planners, and increased agency of patients through access to the internet.: 439 Sociologist nursing professor Kath M. Melia argues that so far as nurses are concerned, medical paternalistic attitudes have remained. Medicalization Medicalization describes the process whereby an ever-wider range of human experiences are defined, experienced and treated as a medical condition. Examples of medicalization can be seen in deviance, such as defining addiction or antisocial personality disorder as a medical condition. Feminist scholars have shown that the female body is prone to medicalization, arguing that the tendency of viewing the female body as the Other has been a factor in this.: 151 Medicalization can obscure social factors by defining a condition as existing entirely within an individual and can be depoliticizing, suggesting than an intervention should be medical when the best intervention is political. Medicalization can give the profession of medicine undue influence.: 152 Social construction of illness Social constructionists study the relationships between ideas about illness and expression, perception and understanding of illness by individuals, institutions and society.: 148 Social constructionists study why diseases exist in one place and not another, or disappear from a particular area. For example, premenstrual syndrome, anorexia nervosa and susto appear to exist in some cultures but not others. There are a broad range of social constructionist frameworks used in medical sociology that make different assumptions about the relationships between ideas, social processes and the material world.: 149 Illnesses vary in the degree to which their definition is socially constructed; some illnesses are straightforwardly biological.: 150 For straightforwardly biological diseases, it would not be meaningful to describe them as a social construction, though it might be meaningful to study the social processes that resulted in the discovery of the disease.: 150 Some illnesses are contested when a patient complains about a disease despite the medical community being unable to find a biological mechanism for disease. Examples of contested diseases include myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), fibromyalgia and Gulf War syndrome. Contested diseases can be studied as social constructs but there is no biomedical understanding. Some contested diseases, such as ME/CFS, are accepted by the institutions of biomedicine while others, such as environmental diseases, are not.: 153 The study of the social construction of illness within medical sociology can be traced to Talcott Parsons' notion of the sick role.: 148 Parsons introduced the notion of the sick role in his book The Social System.: 211 Parsons argued that the sick role is a social role approved and enforced by social norms and institutional behaviours where an individual is viewed as showing certain behaviour because they are in need of support.: 212 Parsons argues that defining properties are that the sick person is exempt from normal social roles, that they are not "responsible" for their condition, that they should try to get well, and that they should seek technically competent people to help them.: 213 The concept of the sick role has been critiqued by sociologists from neo-marxist, phenomonological and social interactionist perspectives, as well as by those with anti-establishment viewpoints.: 76 Burnham argues that part of this criticism is a rejection of functionalism due to its associations with conservatism. The sick role fell out of favour in the 1990s. Labelling theory is derived from the work of Howard S. Becker, who studied the sociology of marijuana use. He argued that norms and deviant behaviour are partly the result of the definitions applied by others. Eliot Freidson applied these concepts to illness.: 226 Labelling theory separates the aspects of an individual's behaviour caused by an illness, and that which is caused by the application of a label. Freidson distinguished labels based on legitimacy and the degree to which to this legitimacy affected an individual's responsibilities.: 227 Labelling theory has been criticized on the grounds that it does not explain which behaviours are labelled as deviant and why people engage in behaviours which are labelled as deviant: labelling theory is not a complete theory of deviant behaviour.: 228 An illness framework is the dominant framework for disease in psychiatry and diagnosis is considered worthwhile.: 2 Psychiatry has emphasized the biological when considering mental illness.: 3 Some psychiatrists have criticized this model: some prefer biopsychosocial definitions, while others prefer social constructionist models, and still others have argued that madness is an intelligent response if all circumstances are understood (Laing and Esterson). Thomas Szasz, who trained as a psychiatrist, argued that mental health was a bad concept in his 1961 book The Myth of Mental Illness, arguing that minds can only be ill metaphorically.: 3 Doctor–patient relationship The doctor–patient relationship, the social interactions between healthcare providers and those who interact with them, is studied by medical sociology. There are different models for the interaction between a patient and doctor, which may have been more or less prevalent at different times. One such model is medical consumerism, which has partly given way to patient consumerism. Medical paternalism is the perspective that doctors want what is best for the patient and must take decisions on behalf of the patient because the patient is not competent to make their own decisions. Parsons argued that though there was an asymmetry of knowledge and power in the doctor–patient relationship, the medical system provided sufficient safeguards to protect the patient, justifying a paternalistic role by the doctor and medical system.: 496 A system of medical paternalism was prominent following the second world war through to the mid-1960s. Writing in the 1970s, Eliot Freidson referred to medicine as having "professional dominance", determining its work and defining a conceptualization of the problems that are brought to it and the best solutions to them.: 497 Professional dominance is defined by three characteristics: practitioners having power over clients, for example through dependency, knowledge, or location asymmetry; control over juniors in the field, requiring juniors' deference and submission; and control over other professions either by excluding them from practice, or placing them under control of the medical profession.: 161 Yeyoung Oh Nelson argues that this system of paternalism was in part undermined by organizational change in the following decades in the US whereby insurance companies, managers and the pharmaceutical industry started competing for role of conceptualizing and delivering medical services, part of the motive being cost-saving.: 498 Bioethics Bioethics studies ethical concern in medical treatment and research. Many scholars believe that bioethics arose due to a perceived lack of accountability of the medical profession, the field has been broadly adopted with most US hospitals offering some form of ethical consultation. The social effects of the field of bioethics have been studied by medical sociologists.: 2 Informed consent, having its roots in bioethics, is the process by which a doctor and a patient agree to a particular intervention. Medical sociology studies the social processes that influence and at times limit consent. Related fields Social medicine is a similar field to medical sociology in that it tries to conceptualize social interactions: 241 in investigating how the study of social interactions can be used in medicine.: 9 However, the two fields have different training, career paths, titles, funding and publication.: 241 In the 2010s, Rose and Callard argued that this distinction may be arbitrary.: 242 In the 1950s, Strauss argued that it was important to maintain the independence of medical sociology from medicine so that there was a different perspective on sociology separate from the aims of medicine.: 242 Strauss feared that if medical sociology started to adopt the goals expected by medicine it risked losing its focus on analysing society. These fears that have been echoed since by Reid, Gold and Timmermans.: 248 Rosenfeld argues that the study of sociology focused solely on making recommendations for medicine has limited use for theory building and its findings cease to apply in different social situations.: 249 Richard Boulton argues that medical sociology and social medicine are "co-produced" in the sense that social medicine responds to the conceptualization of medical practices created by medical sociology and alters medical practice and medical understanding in response, and that the effects of these changes are then analyzed by medical sociology once again.: 245 He argues that the tendency to view certain theories such as the scientific method (positivism) as the basis for all knowledge, and conversely the tendency to view all knowledge as associated with some activity both risk undermining the field of medical sociology.: 250 Peter Conrad notes that medical anthropology studies some of the same phenomena as medical sociology but argues that medical anthropology has different origins, originally studying medicine within non-western cultures and using different methodologies.: 91–92 He argues that there was some convergence between the disciplines, as medical sociology started to adopt some of the methodologies of anthropology such as qualitative research and began to focus more on the patient, and medical anthropology started to focus on western medicine. He argues that more interdisciplinary communication could improve both disciplines.: 97 See also References Reid, Margaret (1976), "The Development of Medical Sociology in Britain", Discussion Papers in Social Research No 13, University of Glasgow, archived from the original on 2011-09-30, retrieved 2011-03-11 Further reading Brown, Phil (2008). Perspectives in Medical Sociology (4th ed.). Long Grove, IL: Waveland Press. ISBN 978-1-57766-518-2. OCLC 173976504. Cockerham, William C.; Ritchey, Ferris Joseph (1997). Dictionary of Medical Sociology. Westport, CT: Greenwood Press. ISBN 978-0-313-29269-9. OCLC 35637576. Conrad, Peter (2007). The Medicalization of Society: On the Transformation of Human Conditions into Treatable Disorders. Baltimore, MD: Johns Hopkins University Press. ISBN 978-0-8018-8584-6. OCLC 72774268. Helman, Cecil (2007). Culture, Health, and Illness (5th ed.). London, England: Hodder Arnold. ISBN 978-0-340-91450-2. OCLC 74966843. Law, Jacky (2006). Big Pharma: Exposing the Global Healthcare Agenda. New York, NY: Carroll and Graf. ISBN 978-0-7867-1783-5. OCLC 64590433. Levy, Judith A.; Pescosolido, Bernice A. (2002). Social Networks and Health (1st ed.). Amsterdam, the Netherlands; Boston, MA: JAI. ISBN 978-0-7623-0881-1. OCLC 50494394. Mechanic, David (1994). Inescapable Decisions: The Imperatives of Health Reform. New Brunswick, NJ: Transaction Publishers. ISBN 978-1-56000-121-8. OCLC 28029448. Rogers, Anne; Pilgrim, David (2005). A Sociology of Mental Health and Illness (3rd ed.). Maidenhead, England: Open University Press. ISBN 978-0-335-21584-3. OCLC 60320098. Scambler, Graham; Higgs, Paul (1998). Modernity, Medicine, and Health: Medical Sociology Towards 2000. London and New York: Routledge. ISBN 978-0-415-14938-9. OCLC 37573644. Turner, Bryan M. (2004). The New Medical Sociology: Social Forms of Health and Illness. New York, NY: W.W. Norton. ISBN 978-0-393-97505-5. OCLC 54692993. |
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[SOURCE: https://en.wikipedia.org/wiki/Progress_in_artificial_intelligence] | [TOKENS: 1704] |
Contents Progress in artificial intelligence Progress in artificial intelligence (AI) refers to the advances, milestones, and breakthroughs that have been achieved in the field of artificial intelligence over time. AI is a branch of computer science that aims to create machines and systems capable of performing tasks that typically require human intelligence. AI applications have been used in a wide range of fields including medical diagnosis, finance, robotics, law, video games, agriculture, and scientific discovery. The society as a whole is looking for artificial intelligence to be on a key factor in the upcming years because of its potential. However, many AI applications are not perceived as AI: "A lot of cutting-edge AI has filtered into general applications, often without being called AI because once something becomes useful enough and common enough it's not labeled AI anymore." "Many thousands of AI applications are deeply embedded in the infrastructure of every industry." In the late 1990s and early 2000s, AI technology became widely used as elements of larger systems, but the field was rarely credited for these successes at the time. Kaplan and Haenlein structure artificial intelligence along three evolutionary stages: To allow comparison with human performance, artificial intelligence can be evaluated on constrained and well-defined problems. Such tests have been termed subject-matter expert Turing tests. Also, smaller problems provide more achievable goals and there are an ever-increasing number of positive results. In 2023, humans still substantially outperformed both GPT-4 and other models tested on the ConceptARC benchmark. Those models scored 60% on most, and 77% on one category, while humans scored 91% on all and 97% on one category. However, later research in 2025 showed that human-generated output grids were only accurate 73% of the time, while AI models available that year managed to score above 77%. Current performance in specific areas There are many useful abilities that can be described as showing some form of intelligence. This gives better insight into the comparative success of artificial intelligence in different areas. AI, like electricity or the steam engine, is a general-purpose technology. There is no consensus on how to characterize which tasks AI tends to excel at. Some versions of Moravec's paradox observe that humans are more likely to outperform machines in areas such as physical dexterity that have been the direct target of natural selection. While projects such as AlphaZero have succeeded in generating their own knowledge from scratch, many other machine learning projects require large training datasets. Researcher Andrew Ng has suggested, as a "highly imperfect rule of thumb", that "almost anything a typical human can do with less than one second of mental thought, we can probably now or in the near future automate using AI." Games provide a high-profile benchmark for assessing rates of progress; many games have a large professional player base and a well-established competitive rating system. AlphaGo brought the era of classical board-game benchmarks to a close when Artificial Intelligence proved their competitive edge over humans in 2016. Deep Mind's AlphaGo AI software program defeated the world's best professional Go Player Lee Sedol. Games of imperfect knowledge provide new challenges to AI in the area of game theory; the most prominent milestone in this area was brought to a close by Libratus' poker victory in 2017. E-sports continue to provide additional benchmarks; Facebook AI, Deepmind, and others have engaged with the popular StarCraft franchise of videogames. Broad classes of outcome for an AI test may be given as: Proposed tests of artificial intelligence In his famous Turing test, Alan Turing picked language, the defining feature of human beings, for its basis. The Turing test is now considered too exploitable to be a meaningful benchmark. The Feigenbaum test, proposed by the inventor of expert systems, tests a machine's knowledge and expertise about a specific subject. A paper by Jim Gray of Microsoft in 2003 suggested extending the Turing test to speech understanding, speaking and recognizing objects and behavior. Proposed "universal intelligence" tests aim to compare how well machines, humans, and even non-human animals perform on problem sets that are generic as possible. At an extreme, the test suite can contain every possible problem, weighted by Kolmogorov complexity; however, these problem sets tend to be dominated by impoverished pattern-matching exercises where a tuned AI can easily exceed human performance levels. Exams According to OpenAI, in 2023 ChatGPT GPT-4 scored the 90th percentile on the Uniform Bar Exam. On the SATs, GPT-4 scored the 89th percentile on math, and the 93rd percentile in Reading & Writing. On the GREs, it scored on the 54th percentile on the writing test, 88th percentile on the quantitative section, and 99th percentile on the verbal section. It scored in the 99th to 100th percentile on the 2020 USA Biology Olympiad semifinal exam. It scored a perfect "5" on several AP exams. Independent researchers found in 2023 that ChatGPT GPT-3.5 "performed at or near the passing threshold" for the three parts of the United States Medical Licensing Examination. GPT-3.5 was also assessed to attain a low, but passing, grade from exams for four law school courses at the University of Minnesota. GPT-4 passed a text-based radiology board–style examination. Competitions Many competitions and prizes, such as the Imagenet Challenge, promote research in artificial intelligence. The most common areas of competition include general machine intelligence, conversational behavior, data-mining, robotic cars, and robot soccer as well as conventional games. Past and current predictions An expert poll around 2016, conducted by Katja Grace of the Future of Humanity Institute and associates, gave median estimates of 3 years for championship Angry Birds, 4 years for the World Series of Poker, and 6 years for StarCraft. On more subjective tasks, the poll gave 6 years for folding laundry as well as an average human worker, 7–10 years for expertly answering 'easily Googleable' questions, 8 years for average speech transcription, 9 years for average telephone banking, and 11 years for expert songwriting, but over 30 years for writing a New York Times bestseller or winning the Putnam math competition. An AI defeated a grandmaster in a regulation tournament game for the first time in 1988; rebranded as Deep Blue, it beat the reigning human world chess champion in 1997 (see Deep Blue versus Garry Kasparov). AlphaGo defeated a European Go champion in October 2015, and Lee Sedol in March 2016, one of the world's top players (see AlphaGo versus Lee Sedol). According to Scientific American and other sources, most observers had expected superhuman Computer Go performance to be at least a decade away. AI pioneer and economist Herbert A. Simon inaccurately predicted in 1965: "Machines will be capable, within twenty years, of doing any work a man can do". Similarly, in 1970 Marvin Minsky wrote that "Within a generation... the problem of creating artificial intelligence will substantially be solved." Four polls conducted in 2012 and 2013 suggested that the median estimate among experts for when AGI would arrive was 2040 to 2050, depending on the poll. The Grace poll around 2016 found results varied depending on how the question was framed. Respondents asked to estimate "when unaided machines can accomplish every task better and more cheaply than human workers" gave an aggregated median answer of 45 years and a 10% chance of it occurring within 9 years. Other respondents asked to estimate "when all occupations are fully automatable. That is, when for any occupation, machines could be built to carry out the task better and more cheaply than human workers" estimated a median of 122 years and a 10% probability of 20 years. The median response for when "AI researcher" could be fully automated was around 90 years. No link was found between seniority and optimism, but Asian researchers were much more optimistic than North American researchers on average; Asians predicted 30 years on average for "accomplish every task", compared with the 74 years predicted by North Americans. See also References Notes External links |
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Contents Birthday A birthday is the anniversary of the birth of a person or the figurative birth of an institution. Birthdays of people are celebrated in numerous cultures, often with birthday gifts, birthday cards, a birthday party, or a rite of passage. Many religions celebrate the birth of their founders or religious figures with special holidays (e.g. Christmas, Mawlid, Buddha's Birthday, Krishna Janmashtami, and Gurpurb). There is a distinction between birthday and birthdate (also known as date of birth): the former, except for February 29, occurs each year (e.g. January 15), while the latter is the complete date when a person was born (e.g. January 15, 2001). Coming of age In most legal systems, one becomes a legal adult on a particular birthday when they reach the age of majority (usually between 12 and 21), and reaching age-specific milestones confers particular rights and responsibilities. At certain ages, one may become eligible to leave full-time education, become subject to military conscription or to enlist in the military, to consent to sexual intercourse, to marry with parental consent, to marry without parental consent, to vote, to run for elected office, to legally purchase (or consume) alcohol and tobacco products, to purchase lottery tickets, or to obtain a driver's licence. The age of majority is when minors cease to legally be considered children and assume control over their persons, actions, and decisions, thereby terminating the legal control and responsibilities of their parents or guardians over and for them. Most countries set the age of majority at 18, though it varies by jurisdiction. Many cultures celebrate a coming of age birthday when a person reaches a particular year of life. Some cultures celebrate landmark birthdays in early life or old age. In many cultures and jurisdictions, if a person's real birthday is unknown (for example, if they are an orphan), their birthday may be adopted or assigned to a specific day of the year, such as January 1. Racehorses are reckoned to become one year old in the year following their birth on January 1 in the Northern Hemisphere and August 1 in the Southern Hemisphere.[relevant?] Birthday parties In certain parts of the world, an individual's birthday is celebrated by a party featuring a specially made cake. Presents are bestowed on the individual by the guests appropriate to their age. Other birthday activities may include entertainment (sometimes by a hired professional, i.e., a clown, magician, or musician) and a special toast or speech by the birthday celebrant. The last stanza of Patty Hill's and Mildred Hill's famous song, "Good Morning to You" (unofficially titled "Happy Birthday to You") is typically sung by the guests at some point in the proceedings. In some countries, a piñata takes the place of a cake. The birthday cake may be decorated with lettering and the person's age, or studded with the same number of lit candles as the age of the individual. The celebrated individual may make a silent wish and attempt to blow out the candles in one breath; if successful, superstition holds that the wish will be granted. In many cultures, the wish must be kept secret or it will not "come true". Birthdays as holidays Historically significant people's birthdays, such as national heroes or founders, are often commemorated by an official holiday marking the anniversary of their birth. Some notables, particularly monarchs, have an official birthday on a fixed day of the year, which may not necessarily match the day of their birth, but on which celebrations are held. In Mahayana Buddhism, many monasteries celebrate the anniversary of Buddha's birth, usually in a highly formal, ritualized manner. They treat Buddha's statue as if it was Buddha himself as if he were alive; bathing, and "feeding" him. Jesus Christ's traditional birthday is celebrated as Christmas Eve or Christmas Day around the world, on December 24 or 25, respectively. As some Eastern churches use the Julian calendar, December 25 will fall on January 7 in the Gregorian calendar. These dates are traditional and have no connection with Jesus's actual birthday, which is not recorded in the Gospels. Similarly, the birthdays of the Virgin Mary and John the Baptist are liturgically celebrated on September 8 and June 24, especially in the Roman Catholic and Eastern Orthodox traditions (although for those Eastern Orthodox churches using the Julian calendar the corresponding Gregorian dates are September 21 and July 7 respectively). As with Christmas, the dates of these celebrations are traditional and probably have no connection with the actual birthdays of these individuals. Catholic saints are remembered by a liturgical feast on the anniversary of their "birth" into heaven a.k.a. their day of death. In Hinduism, Ganesh Chaturthi is a festival celebrating the birth of the elephant-headed deity Ganesha in extensive community celebrations and at home. Figurines of Ganesha are made for the holiday and are widely sold. Sikhs celebrate the anniversary of the birth of Guru Nanak and other Sikh gurus, which is known as Gurpurb. Mawlid is the anniversary of the birth of Muhammad and is celebrated on the 12th or 17th day of Rabi' al-awwal by adherents of Sunni and Shia Islam respectively. These are the two most commonly accepted dates of birth of Muhammad. However, there is much controversy regarding the permissibility of celebrating Mawlid, as some Muslims judge the custom as an unacceptable practice according to Islamic tradition. In Iran, Mother's Day is celebrated on the birthday of Fatima al-Zahra, the daughter of Muhammad. Banners reading Ya Fatima ("O Fatima") are displayed on government buildings, private buildings, public streets and car windows. Religious views In Judaism, rabbis are divided about celebrating this custom, although the majority of the faithful accept it. In the Torah, the only mention of a birthday is the celebration of Pharaoh's birthday in Egypt (Genesis 40:20). Although the birthday of Jesus of Nazareth is celebrated as a Christian holiday on December 25, historically the celebrating of an individual person's birthday has been subject to theological debate. Early Christians, notes The World Book Encyclopedia, "considered the celebration of anyone's birth to be a pagan custom." Origen, in his commentary "On Levites," wrote that Christians should not only refrain from celebrating their birthdays but should look at them with disgust as a pagan custom. A saint's day was typically celebrated on the anniversary of their martyrdom or death, considered the occasion of or preparation for their entrance into Heaven or the New Jerusalem. Ordinary folk in the Middle Ages celebrated their saint's day (the saint they were named after), but nobility celebrated the anniversary of their birth.[citation needed] The "Squire's Tale", one of Chaucer's Canterbury Tales, opens as King Cambuskan proclaims a feast to celebrate his birthday. In the Modern era, the Catholic Church, the Eastern Orthodox Church and Protestantism, i.e. the three main branches of Christianity, as well as almost all Christian religious denominations, consider celebrating birthdays acceptable or at most a choice of the individual. An exception is Jehovah's Witnesses, who do not celebrate them for various reasons: in their interpretation this feast has pagan origins, was not celebrated by early Christians, is negatively expounded in the Holy Scriptures and has customs linked to superstition and magic. In some historically Roman Catholic and Eastern Orthodox countries,[a] it is common to have a 'name day', otherwise known as a 'Saint's day'. It is celebrated in much the same way as a birthday, but it is held on the official day of a saint with the same Christian name as the birthday person; the difference being that one may look up a person's name day in a calendar, or easily remember common name days (for example, John or Mary); however in pious traditions, the two were often made to concur by giving a newborn the name of a saint celebrated on its day of confirmation, more seldom one's birthday. Some are given the name of the religious feast of their christening's day or birthday, for example, Noel or Pascal (French for Christmas and "of Easter"); as another example, Togliatti was given Palmiro as his first name because he was born on Palm Sunday. The birthday does not reflect Islamic tradition, and because of this, the majority of Muslims refrain from celebrating it. Others do not object, as long as it is not accompanied by behavior contrary to Islamic tradition. A good portion of Muslims (and Arab Christians) who have emigrated to the United States and Europe celebrate birthdays as customary, especially for children, while others abstain. Hindus celebrate the birth anniversary day every year when the day that corresponds to the lunar month or solar month (Sun Signs Nirayana System – Sourava Mana Masa) of birth and has the same asterism (Star/Nakshatra) as that of the date of birth. That age is reckoned whenever Janma Nakshatra of the same month passes. Hindus regard death to be more auspicious than birth, since the person is liberated from the bondages of material society. Also, traditionally, rituals and prayers for the departed are observed on the 5th and 11th days, with many relatives gathering. Historical and cultural perspectives According to Herodotus (5th century BC), of all the days in the year, the one which the Persians celebrate most is their birthday. It was customary to have the board furnished on that day with an ampler supply than common: the richer people eat wholly baked cow, horse, camel, or donkey (Greek: ὄνον), while the poorer classes use instead the smaller kinds of cattle. On his birthday, the king anointed his head and presented gifts to the Persians. According to the law of the Royal Supper, on that day "no one should be refused a request". The rule for drinking was "No restrictions". In ancient Rome, a birthday (dies natalis) was originally an act of religious cultivation (cultus). A dies natalis was celebrated annually for a temple on the day of its founding, and the term is still used sometimes for the anniversary of an institution such as a university. The temple founding day might become the "birthday" of the deity housed there. March 1, for example, was celebrated as the birthday of the god Mars. Each human likewise had a natal divinity, the guardian spirit called the Genius, or sometimes the Juno for a woman, who was owed religious devotion on the day of birth, usually in the household shrine (lararium). The decoration of a lararium often shows the Genius in the role of the person carrying out the rites. A person marked their birthday with ritual acts that might include lighting an altar, saying prayers, making vows (vota), anointing and wreathing a statue of the Genius, or sacrificing to a patron deity. Incense, cakes, and wine were common offerings. Celebrating someone else's birthday was a way to show affection, friendship, or respect. In exile, the poet Ovid, though alone, celebrated not only his own birthday rite but that of his far distant wife. Birthday parties affirmed social as well as sacred ties. One of the Vindolanda tablets is an invitation to a birthday party from the wife of one Roman officer to the wife of another. Books were a popular birthday gift, sometimes handcrafted as a luxury edition or composed especially for the person honored. Birthday poems are a minor but distinctive genre of Latin literature. The banquets, libations, and offerings or gifts that were a regular part of most Roman religious observances thus became part of birthday celebrations for individuals. A highly esteemed person would continue to be celebrated on their birthday after death, in addition to the several holidays on the Roman calendar for commemorating the dead collectively. Birthday commemoration was considered so important that money was often bequeathed to a social organization to fund an annual banquet in the deceased's honor. The observance of a patron's birthday or the honoring of a political figure's Genius was one of the religious foundations for imperial cult or so-called "emperor worship." The Chinese word for "year(s) old" (t 歲, s 岁, suì) is entirely different from the usual word for "year(s)" (年, nián), reflecting the former importance of Chinese astrology and the belief that one's fate was bound to the stars imagined to be in opposition to the planet Jupiter at the time of one's birth. The importance of this duodecennial orbital cycle only survives in popular culture as the 12 animals of the Chinese zodiac, which change each Chinese New Year and may be used as a theme for some gifts or decorations. Because of the importance attached to the influence of these stars in ancient China and throughout the Sinosphere, East Asian age reckoning previously began with one at birth and then added years at each Chinese New Year, so that it formed a record of the suì one had lived through rather than of the exact amount of time from one's birth. This method—which can differ by as much as two years of age from other systems—is increasingly uncommon and is not used for official purposes in the PRC or on Taiwan, although the word suì is still used for describing age. Traditionally, Chinese birthdays—when celebrated—were reckoned using the lunisolar calendar, which varies from the Gregorian calendar by as much as a month forward or backward depending on the year. Celebrating the lunisolar birthday remains common on Taiwan while growing increasingly uncommon on the mainland. Birthday traditions reflected the culture's deep-seated focus on longevity and wordplay. From the homophony in some dialects between 酒 ("rice wine") and 久 (meaning "long" in the sense of time passing), osmanthus and other rice wines are traditional gifts for birthdays in China. Longevity noodles are another traditional food consumed on the day, although western-style birthday cakes are increasingly common among urban Chinese. Hongbaos—red envelopes stuffed with money, now especially the red 100 RMB notes—are the usual gift from relatives and close family friends for most children. Gifts for adults on their birthdays are much less common, although the birthday for each decade is a larger occasion that might prompt a large dinner and celebration. The Japanese reckoned their birthdays by the Chinese system until the Meiji Reforms. Celebrations remained uncommon or muted until after the American occupation that followed World War II.[citation needed] Children's birthday parties are the most important, typically celebrated with a cake, candles, and singing. Adults often just celebrate with their partner. In North Korea, the Day of the Sun, Kim Il Sung's birthday, is the most important public holiday of the country, and Kim Jong Il's birthday is celebrated as the Day of the Shining Star. North Koreans are not permitted to celebrate birthdays on July 8 and December 17 because these were the dates of the deaths of Kim Il Sung and Kim Jong Il, respectively. More than 100,000 North Koreans celebrate displaced birthdays on July 9 and December 18 instead to avoid these dates. A person born on July 8 before 1994 may change their birthday, with official recognition. South Korea was one of the last countries to use a form of East Asian age reckoning for many official purposes. Prior to June 2023, three systems were used together—"Korean ages" that start with 1 at birth and increase every January 1st with the Gregorian New Year, "year ages" that start with 0 at birth and otherwise increase the same way, and "actual ages" that start with 0 at birth and increase each birthday. First birthday celebrations was heavily celebrated, despite usually having little to do with the child's age. In June 2023, all Korean ages were set back at least one year, and official ages henceforth are reckoned only by birthdays. In Ghana, children wake up on their birthday to a special treat called oto, which is a patty made from mashed sweet potato and eggs fried in palm oil. Later they have a birthday party where they usually eat stew and rice and a dish known as kelewele, which is fried plantain chunks. Distribution through the year Birthdays are fairly evenly distributed throughout the year, with some seasonal effects. In the United States, there tend to be more births in September and October. This may be because there is a holiday season nine months before (the human gestation period is about nine months), or because the longest nights of the year also occur in the Northern Hemisphere nine months before. However, the holidays affect birth rates more than the winter: New Zealand, a Southern Hemisphere country, has the same September and October peak with no corresponding peak in March and April. The least common birthdays tend to fall around public holidays, such as Christmas, New Year's Day and fixed-date holidays such as Independence Day in the US, which falls on July 4. Between 1973 and 1999, September 16 was the most common birthday in the United States, and December 25 was the least common birthday (other than February 29 because of leap years). In 2011, October 5 and 6 were reported as the most frequently occurring birthdays. New Zealand's most common birthday is September 29, and the least common birthday is December 25. The ten most common birthdays all fall within a thirteen-day period, between September 22 and October 4. The ten least common birthdays (other than February 29) are December 24–27, January 1–2, February 6, March 22, April 1, and April 25. This is based on all live births registered in New Zealand between 1980 and 2017. Positive and negative associations with culturally significant dates may influence birth rates. The study shows a 5.3% decrease in spontaneous births and a 16.9% decrease in Caesarean births on Halloween, compared to dates occurring within one week before and one week after the October holiday. In contrast, on Valentine's Day, there is a 3.6% increase in spontaneous births and a 12.1% increase in Caesarean births. In Sweden, 9.3% of the population is born in March and 7.3% in November, when a uniform distribution would give 8.3%. In the Gregorian calendar (a common solar calendar), February in a leap year has 29 days instead of the usual 28, so the year lasts 366 days instead of the usual 365. A person born on February 29 may be called a "leapling" or a "leaper". In common years, they usually celebrate their birthdays on February 28. In some situations, March 1 is used as the birthday in a non-leap year since it is the day following February 28. Technically, a leapling will have fewer birthday anniversaries than their age in years. This phenomenon is exploited when a person claims to be only a quarter of their actual age, by counting their leap-year birthday anniversaries only. In Gilbert and Sullivan's 1879 comic opera The Pirates of Penzance, Frederic the pirate apprentice discovers that he is bound to serve the pirates until his 21st birthday rather than until his 21st year. For legal purposes, legal birthdays depend on how local laws count time intervals. An individual's Beddian birthday, named in tribute to firefighter Bobby Beddia, occurs during the year that their age matches the last two digits of the year they were born. Some studies show people are more likely to die on their birthdays, with explanations including excessive drinking, suicide, cardiovascular events due to high stress or happiness, efforts to postpone death for major social events, and death certificate paperwork errors. See also References Notes External links |
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Contents Presidents' Day Presidents' Day, officially Washington's Birthday at the federal governmental level, is a holiday in the United States celebrated on the third Monday of February. It is often celebrated to honor all those who served as presidents of the United States and, since 1879, has been the federal holiday honoring Founding Father George Washington, who led the Continental Army to victory in the American Revolutionary War, presided at the Constitutional Convention of 1787, and served as the first U.S. president from 1789 to 1797. The day is an official state holiday in most states under various names. Depending upon the specific law, the state holiday may officially celebrate Washington alone, Washington and Abraham Lincoln, or some other combination of U.S. presidents (such as Washington and Thomas Jefferson, who was born in April). George Washington was born on February 22, 1732 (N.S.). Washington's Birthday was celebrated on this date from 1879 until 1970. To give federal employees a three-day weekend, in 1968 the Uniform Monday Holiday Act moved it to the third Monday in February, which can occur between February 15 and 21, starting in 1971. The day soon became known as Presidents(') Day (the presence and placement of the apostrophe varies) and provides an occasion to remember all the U.S. presidents, to honor Abraham Lincoln's and Washington's birthdays together, or any single president of choice. As many states and cities followed suit, some states that had been celebrating Lincoln's birthday on February 12 combined the two into Presidents' Day. Lincoln led the nation through the American Civil War, preserved the Union, abolished slavery, bolstered the federal government, and modernized the U.S. economy. Official state holidays Lincoln's Birthday, February 12, was never a federal holiday, but nearly half the state governments have officially renamed their observances "Presidents' Day", "Washington and Lincoln Day", or other such designations. (In historical rankings of presidents of the United States, Lincoln and Washington are often the top two.) In the following states and territories of the United States, this same day is an official state holiday and known as— Using "President" in the official title: Using "Washington" alone: Using both "Washington" and "Lincoln": Using "Washington" and another person: Using something else: Not a holiday: Several states honor presidents with official state holidays that do not fall on the third Monday of February. In Massachusetts, the state officially celebrates "Washington's Birthday" on the same day as the federal holiday. State law also directs the governor to issue an annual "Presidents Day" proclamation on May 29 (John F. Kennedy's birthday), honoring the presidents with Massachusetts roots: Kennedy, John Adams, John Quincy Adams, and Calvin Coolidge. In California, Connecticut, Florida, Illinois, Michigan, New Jersey, and New York Lincoln's Birthday is a separate state holiday celebrated on February 12. In Missouri, Washington's Birthday is a federal holiday, observed on the third Monday in February, and Abraham Lincoln's birthday is observed on the Monday closest to February 12 (always the Monday preceding Washington's Birthday). In New Mexico, Presidents' Day, at least as a state-government paid holiday, is observed on the Friday following Thanksgiving, although the legal public holiday remains the third Monday in February. In Georgia, Washington's Birthday is not a state-government paid holiday, although until 2018 it was officially observed on Christmas Eve. Similarly, in Indiana, Washington's Birthday is observed on Christmas Eve, or the day preceding the weekend if Christmas falls on Saturday or Sunday, while Lincoln's Birthday is the day after Thanksgiving. History George Washington was born on February 22, 1731 (O.S.), at his parents' Pope's Creek Estate near Colonial Beach in Westmoreland County, Virginia, now the George Washington Birthplace National Monument. At the time, the entire British Empire, including its North American possessions, was on the Julian calendar; the Empire, not being bound to the Catholic Church, had not yet adopted the modern Gregorian calendar that Catholic countries had adopted in 1582. Consequently, by the 1730s, the Julian calendar used by Britain and the Colonies was eleven days behind the Gregorian, because of leap year differences. Furthermore, the British civil year began on March 25 rather than January 1, so that dates in February (such as this one) 'belonged' to the preceding year. In 1752, the British Empire switched to the Gregorian calendar; since then, Americans born prior to 1752, including Washington, have typically had their birthdays recognized according to the Gregorian calendar ("New Style" dates). Since February 11, 1731, on the Julian calendar was February 22, 1732, on the Gregorian, and he was alive at the time the change was made, Washington changed his birth date to February 22, 1732, to match the new calendar. The federal holiday honoring Washington was originally implemented by an Act of Congress in 1879 for government offices in Washington (20 Stat. 277) and expanded in 1885 to include all federal offices (23 Stat. 516). As the first federal holiday to honor an American president, the holiday was celebrated on Washington's birthday under the Gregorian calendar, February 22.[a] On January 1, 1971, the federal holiday was shifted to the third Monday in February by the Uniform Monday Holiday Act. This places it between February 15 and 21, which makes "Washington's Birthday" something of a misnomer, since it never occurs on Washington's actual birthday, February 22. (A rough analogue of this phenomenon can be seen in Commonwealth realms, where the reigning monarch's official birthday is celebrated without regard to the monarch's actual date of birth.)[citation needed] The first attempt to create a Presidents Day occurred in 1951 when the President's Day National Committee was formed by Harold Stonebridge Fischer of Compton, California, who became its National Executive Director for the next two decades. The purpose was not to honor any particular president but to honor the office of the presidency. It was first thought that March 4, the original inauguration day, should be deemed Presidents Day, but the bill recognizing March 4 stalled in the Senate Judiciary Committee (which had authority over federal holidays). The committee felt that, given its proximity to Lincoln's and Washington's Birthdays, three holidays so close together would be unduly burdensome. But meanwhile the governors of a majority of the states issued proclamations declaring March 4 Presidents' Day in their respective jurisdictions. An early draft of the Uniform Monday Holiday Act would have renamed the holiday "Presidents' Day" to honor the birthdays of both Washington and Lincoln, which would explain why the chosen date falls between the two, but this proposal failed in committee, and the bill was voted on and signed into law on June 28, 1968, keeping the name Washington's Birthday. By the mid-1980s, with a push from advertisers, the term Presidents' Day began its public appearance. In Washington's adopted hometown of Alexandria, Virginia, celebrations are held throughout February. Observance and traditions A food traditionally associated with the holiday is cherry pie, based on the legend of Washington in his youth chopping down a cherry tree. Until the late 1980s, corporate businesses generally closed on this day, similar to present corporate practices on Memorial Day or Christmas Day. However, after having been moved to the third Monday, most businesses remain open with many offering sales and other promotions. Federal and state government services close (U.S. Postal Service, state Departments of Motor Vehicles, federal and state courts). Class schedules at universities and colleges vary depending on the school. Public elementary and secondary schools are generally closed, but some school districts, such as New York City, may close for an entire week as a "mid-winter recess". The holiday is also a tribute to the general who created the first military badge of merit for the common soldier. Revived on Washington's 200th birthday in 1932, the Purple Heart medal (which bears Washington's image) is awarded to soldiers who are injured in battle. Community celebrations often display a lengthy heritage. Laredo, Texas, hosts a monthlong tribute, as does Washington's hometown of Alexandria, Virginia, which includes what is claimed to be the nation's longest-running and largest George Washington Birthday parade. Eustis, Florida, holds an annual GeorgeFest celebration that began in 1902, and in Denver, Colorado, there is a society dedicated to observing the day. At the George Washington Birthplace National Monument in Westmoreland County, Virginia, visitors are treated to birthday celebrations on the holiday, while at Mount Vernon they last throughout the holiday weekend and through February 22. Since 1862 there has been a tradition in the United States Senate that George Washington's Farewell Address be read on his birthday. Citizens asked that this be done in light of the ongoing Civil War. The holiday is well-known for coinciding with deep sales discounts for big ticket items such as appliances, furniture, and especially mattresses. This is due to retailers trying to clear their inventory and taking advantage of tax season. These are typically referred to as President's Day Sales. Since the mid-2000s, the National Basketball Association has held their annual All-Star festivities during the holiday weekend. As a result, no games are played on the holiday itself, and the season resumes the following Thursday.[citation needed] The day before Presidents Day is the traditional running of the Daytona 500 NASCAR race; there have been occasions when the race was cut short, or either finished on or postponed entirely to the holiday due to inclement weather, the most recent of which was the 2024 edition.[citation needed] Punctuation Because "Presidents' Day" is not the official name of the federal holiday, there is variation in how it is rendered, both colloquially and in the name of official state holidays. When used with the intention of celebrating more than one individual, the form "Presidents' Day" celebrates all presidents individually (therefore, George Washington's Day and Zachary Taylor's Day and Woodrow Wilson's Day). In recent years, as the use of attributive nouns (nouns acting as modifiers) has become more widespread, the form "Presidents Day" has also become common (celebrating Presidents Washington through Trump collectively) in honoring the whole concept of presidents; the Associated Press Stylebook, most newspapers and some magazines use this form. "President's Day" as an alternate rendering is to honor any one particular president, or for the purpose of commemorating the presidency as an institution. This use of a possessive is the legal rendering in eight states. Dates See also Notes References External links (federal) = federal holidays, (abbreviation) = state/territorial holidays, (religious) = religious holidays, (cultural) = holiday related to a specific racial/ethnic group or sexual minority, (week) = week-long holidays, (month) = month-long holidays, (36) = Title 36 Observances and Ceremonies |
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[SOURCE: https://en.wikipedia.org/wiki/Streaming_television] | [TOKENS: 5318] |
Contents Streaming television Page version status This is an accepted version of this page Streaming television is the digital distribution of television media content, such as films and series, over Internet-based streaming media platforms. In contrast to over-the-air, cable, and satellite transmissions, or IPTV service, streaming television is provided as over-the-top media (OTT). Television content includes productions made by or for OTT services, and acquired by them with licensing agreements. The length of a streaming television series episode can be anywhere from thirty to sixty minutes (some episodes may be longer). By 2023, streaming television represented 38% of global TV viewing with 1.8 billion subscriptions to streaming platforms. In 2024, streaming television became "the dominant form of TV viewing" in the United States.[a] It surpassed cable and network television viewing in 2025. Of the top streaming platforms, Netflix had over 325 million subscribers as of December 2025, making it the most popular global streaming television platform. History Up until the 1990s, it was not thought possible that a television show could be squeezed into the limited telecommunication bandwidth of a copper telephone cable to provide a streaming service of acceptable quality, as the required bandwidth of a digital television signal was (in the mid-1990s perceived to be) around 200 Mbit/s, which was 2,000 times greater than the bandwidth of a speech signal over a copper telephone wire. Streaming services started as a result of two major technological developments: MPEG (motion-compensated DCT) video compression and asymmetric digital subscriber line (ADSL) data communication. By the year 2000, a television broadcast could be compressed to 2 Mbit/s, but most consumers still had little opportunity to obtain greater than 1 Mbit/s connection speeds. The first worldwide live-streaming event was a radio live broadcast of a baseball game between the Seattle Mariners and the New York Yankees streamed by ESPN SportsZone on September 5, 1995. The mid-2000s were the beginning of television programs becoming available via the Internet. In November 2003, Angelos Diamantoulakis launched the streaming television service TVonline, making it the world's first television station to produce and broadcast content exclusively over the internet via web page. The online video platform site YouTube was launched in early 2005, allowing users to share illegally posted television programs. YouTube co-founder Jawed Karim said the inspiration for YouTube first came from Janet Jackson's role in the 2004 Super Bowl incident, when her breast was exposed during her performance, and later from the 2004 Indian Ocean tsunami. Karim could not easily find video clips of either event online, which led to the idea of a video sharing site. Apple's iTunes service also began offering select television programs and series in 2005, available for download after direct payment. During the mid-2000s, the streaming media was based on UDP, whereas the basis of the majority of the Internet was HTTP and content delivery networks (CDNs). In 2007, HTTP-based adaptive streaming was introduced by Move Networks. This new technology would be a significant change for the industry. One year later the introduction of HTTP-based adaptive streaming, many companies such as Microsoft and Netflix developed their streaming technology. In 2009, Apple launched HTTP Live Streaming (HLS). Television networks and other independent services began creating sites where shows and programs could be streamed online. Amazon Prime Video began in the United States as Amazon Unbox in 2006 (but did not launch worldwide until 2016). Netflix, a website originally created for DVD rentals and sales, began providing streaming content in 2007. The first generation Apple TV was released in 2007. In 2008 Hulu, owned by NBC and Fox, was launched, followed by tv.com in 2009, owned by CBS. Digital media players also began to become available to the public during this time. In 2008, the first generation Roku streaming device was announced. These digital media players have continued to be updated and new generations released. In 2008, the International Academy of Web Television, headquartered in Los Angeles, formed in order to organize and support television actors, authors, executives, and producers in streaming television and web series. The organization also administers the selection of winners for the Streamy Awards. In 2009, the Los Angeles Web Series Festival was founded. Several other festivals and award shows have been dedicated solely to web content, including the Indie Series Awards and the Vancouver Web Series Festival. in 2010, Adobe launched HTTP Dynamic Streaming (HDS). In addition, HTTP-based adaptive streaming was chosen for important streaming events such as Roland Garros, Wimbledon, Vancouver and London Olympic Games, and many others and on premium on-demand services (Netflix, Amazon Instant Video, etc.). The increase in streaming services required a new standardization, therefore in 2012, with the contributions of Apple, Netflix, Microsoft, and other companies, Dynamic Adaptive Streaming, known as MPEG-DASH, was published as the new HTTP-based adaptive streaming standard. Smart TVs took over the television market after 2010 and continue to partner with new providers to bring streaming video to even more users. As of 2015, smart TVs are the only type of middle to high-end television being produced. Amazon's version of a digital media player, Amazon Fire TV, was not offered to the public until 2014. Access to television programming has evolved from computer and television access to include mobile devices such as smartphones and tablet computers. Corresponding apps for mobile devices started to become available via app stores in 2008, but they grew in popularity in the 2010s with the rapid deployment of LTE cellular networks. These apps enable users to stream television content on mobile devices that support them. In 2013, in response to the shifting of the soap opera All My Children from broadcast to streaming television, a new category for "Fantastic web-only series" in the Daytime Emmy Awards was created. That year, Netflix made history with the first Primetime Emmy Award nominations for a streaming television series at the 65th Primetime Emmy Awards, for Arrested Development, Hemlock Grove, and House of Cards. Hulu earned the first Emmy win for Outstanding Drama Series, for The Handmaid's Tale at the 69th Primetime Emmy Awards in 2017. Traditional cable and satellite television providers began to offer streaming services. In 2012, British broadcaster Sky launched Now streaming service in the United Kingdom. Sling TV was unveiled by Dish Network in January 2015. Cable company Comcast announced an HBO plus broadcast TV package at a price discounted from basic broadband plus basic cable in July 2015. DirecTV launched their streaming service, DirecTV Stream, in 2016. In 2017, YouTube launched YouTube TV, a streaming service that allows users to watch live television programs from popular cable or network channels, and record shows to stream anywhere, anytime. By the end 2015, Netflix had almost 75 million world-wide subscribers. In 2017, 28% of US adults cited streaming services as their main means for watching television, and 61% of those ages 18 to 29 cited it as their main method. In 2020, the COVID-19 pandemic had a strong impact in the television streaming business with the lifestyle changes such as staying at home and lockdowns. By 2024, Netflix had become the world's largest streaming television platform with 260.28 million global subscribers. By the end of 2025, its active subscribers total had grown to over 325 million. As of May 2025, Nielsen reported that streaming represented 44.8% of all television viewing, compared to 44.2% for broadcast and cable combined. Technology The Hybrid Broadcast Broadband TV (HbbTV) consortium of industry companies (such as SES, Humax, Philips, and ANT Software) is currently promoting and establishing an open European standard for hybrid set-top boxes for the reception of broadcast and broadband digital television and multimedia applications with a single-user interface. BBC iPlayer originally incorporated peer-to-peer streaming, moved towards centralized distribution for their video streaming services. BBC executive Anthony Rose cited network performance as an important factor in the decision, as well as consumers being unhappy with their own network bandwidth being used for transmitting content to other viewers. Samsung TV has also announced their plans to provide streaming options including 3D Video on Demand through their Explore 3D service. Some streaming services incorporate digital rights management. The W3C made the controversial decision to adopt Encrypted Media Extensions due in large part to motivations to provide copy protection for streaming content. Sky Go has software that is provided by Microsoft to prevent content being copied. Additionally, BBC iPlayer makes use of a parental control system giving users the option to "lock" content, requiring a password to access it. The goal of these systems is to enable parents to keep children from viewing sexually themed, violent, or otherwise age-inappropriate material.[citation needed] Flagging systems can be used to warn a user that content may be certified or that it is intended for viewing post-watershed.[citation needed] Honour systems are also used where users are asked for their dates of birth or age to verify if they are able to view certain content.[citation needed] IPTV delivers television content using signals based on the Internet Protocol (IP), through managed private network infrastructure entirely owned by a single telecom or Internet service provider (ISP). This stands in contrast to delivering content over unmanaged public networks - a practice known as over-the-top content delivery. Both IPTV and OTT use the Internet protocol over a packet-switched network to transmit data, but IPTV operates in a closed system—a dedicated, managed network controlled by the local cable, satellite, telephone, or fiber-optic company. In its simplest form, IPTV simply replaces traditional circuit switched analog or digital television channels with digital channels which happen to use packet-switched transmission. In both the old and new systems, subscribers have set-top boxes or other customer-premises equipment that communicates directly over company-owned or dedicated leased lines with central-office servers. Packets never travel over the public Internet, so the television provider can guarantee enough local bandwidth for each customer's needs. The Internet protocol is a cheap, standardized way to enable two-way communication and simultaneously provide different data (e.g., TV-show files, email, Web browsing) to different customers. This supports DVR-like features for time shifting television: for example, to catch up on a TV show that was broadcast hours or days ago, or to replay the current TV show from its beginning. It also supports video on demand—browsing a catalog of videos (such as movies or television shows) which might be unrelated to the company's scheduled broadcasts. IPTV has an ongoing standardization process (for example, at the European Telecommunications Standards Institute). Streaming quality Streaming quality is the quality of image and audio transmission from the servers of the distributor to the user's screen. Also, Streaming resolution helps to measure the size of the streaming quality of video pixels. High-definition video (720p+) and later standards require higher bandwidth and faster connection speeds than previous standards, because they carry higher spatial resolution image content. In addition, transmission packet loss and latency caused by network impairments and insufficient bandwidth degrade replay quality. Decoding errors may manifest themselves with video breakup and macro blocks. The generally accepted download rate for streaming high-definition (1080p) video encoded in AVC is 6000 kbit/s, whereas UHD requires upwards of 16,000 kbit/s. For users who do not have the bandwidth to stream HD/4K video or even SD video, most streaming platforms make use of an adaptive bitrate stream so that if the user's bandwidth suddenly drops, the platform will lower its streaming bitrate to compensate. Most modern television streaming platforms offer a wide range of both manual and automatic bitrate settings which are based on initial connection tests during the first few seconds of a video loading, and can be changed on the fly. This is valid for both Live and Catch-up content. Additionally, platforms can also offer content in standards such as HDR or Dolby Vision or at higher framerates which can require additional costs or subscription tiers to access. Usage Internet television is common in most US households as of the mid-2010s. In a 2013 study by eMarketer, about one in four new televisions being sold is a smart TV. Within the same decade, rapid deployment of LTE cellular network and general availability of smartphones have increased popularity of the streaming services, and the corresponding apps on mobile devices. On August 18, 2022, Nielsen reported that for the first time, streaming viewership has surpassed cable.[citation needed] Considering the popularity of smart TVs, smartphones, and devices such as the Roku and Chromecast, much of the US public can watch television via the Internet. Internet-only channels are now established enough to feature some Emmy-nominated shows, such as Netflix's House of Cards. Many networks also distribute their shows the next day to streaming providers such as Hulu Some networks may use a proprietary system, such as the BBC utilizes their BBC iPlayer format. This has resulted in bandwidth demands increasing to the point of causing issues for some networks. It was reported in February 2014 that Verizon Fios is having issues coping with the demand placed on their network infrastructure. Until long-term bandwidth issues are worked out and regulation such at net neutrality Internet Televisions push to HDTV may start to hinder growth. Aereo was launched in March 2012 in New York City (and subsequently stopped from broadcasting in June 2014). It streamed network TV only to New York customers over the Internet. Broadcasters filed lawsuits against Aereo, because Aereo captured broadcast signals and streamed the content to Aereo's customers without paying broadcasters. In mid-July 2012, a federal judge sided with the Aereo start-up. Aereo planned to expand to every major metropolitan area by the end of 2013. The Supreme Court ruled against Aereo June 24, 2014. Some have noted that as opposed to broadcast television, with demographics of mostly "unspokenly straight" white viewers, cable, and with streaming services, dollars from subscription can "level the playing field," giving viewers from marginalized communities, and representation of their communities, "equal power." The viewing of television content on streaming platforms represented 19% of all television consumption in the United States in 2019, and by the end of 2023 it had become the nation's "dominant form of TV viewing". With 1.8 billion subscriptions to streaming platforms, streaming television represented 38% of global TV viewing in 2023. However, some streaming platforms have reportedly begun to experience subscriber losses, likely due to price increases. Reportedly, 53% of surveyed millennials choose to cancel subscriptions following increases in subscription costs. Market competitors Many providers of Internet television services exist—including conventional television stations that have taken advantage of the Internet as a way to continue showing television shows after they have been broadcast, often advertised as "on-demand" and "catch-up" services. Today, almost every major broadcaster around the world is operating an Internet television platform. Examples include the BBC, which introduced the BBC iPlayer on 25 June 2008 as an extension to its "RadioPlayer" and already existing streamed video-clip content, and Channel 4 that launched 4oD ("4 on Demand") (now All 4) in November 2006 allowing users to watch recently shown content. Most Internet television services allow users to view content free of charge; however, some content is for a fee. In the UK, the term catch up TV was most commonly used to refer to these sorts of services at the time. Since 2012, around 200 over-the-top (OTT) platforms providing streamed and downloadable content have emerged. Investment by Netflix in new original content for its OTT platform reached $13bn in 2018. Streaming platforms Amazon Prime Video was originally launched in the year 2006. Upon its initial release, the popular streaming service was referred to as Amazon Unbox. Amazon Prime Video was created due to the development of Amazon Prime, which is a paid service that includes free shipping of different types of goods. Amazon Prime Video is available in approximately 200 countries around the world. Each year, Amazon invests in the production of films and TV series that are streamed as Amazon originals. Apple TV+ is a streaming service owned by Apple Inc. Apple TV+ is a streaming subscription platform that launched November 1, 2019. The service offers original content exclusively made by Apple, being seen as Apple Originals. This streaming platform solely releases content that can only be found on Apple TV+, there is no third-party content found on the platform whereas several other streaming services have third-party content. The Apple TV+ name derives from the Apple TV media player that was released in 2007. Disney+ is an American subscription streaming service owned and operated by the Disney Entertainment division of The Walt Disney Company. Released on November 12, 2019, the service primarily distributes films and television series produced by Walt Disney Studios and Disney General Entertainment Content, with dedicated content hubs for the brands Disney, Pixar, Marvel, Star Wars, and National Geographic, as well as Star in some regions. Original films and television series are also distributed on Disney+. Launched in 2007, Hulu is only available to viewers in the United States because of licensing restrictions. Hulu is one of the only streaming services that provides streaming for current on-air television shows a few days after their original broadcast on cable television, but with limited availability. Hulu originally had both a free and paid plan. The free plan was accessible only via computer and there was a limited amount of content for users, whereas the paid plan could be accessed via computers, mobile devices, and connected televisions. In 2019, The Walt Disney Company became the major owner of Hulu. The platform has bundle deals where customers can subscribe to both Hulu and Disney+. HBO Max is a streaming service released by Warner Bros. Discovery. The platform was released on May 27, 2020 in the United States, and within the first five months of launching, had amassed 8 million subscribers across the country. It offers classic Warner Bros. films and self-produced programs, and has won the right to exclusively air Studio Ghibli films in the United States. It is not until 45 days after the theatrical release from 2022 that the release is taking place on the platform and reached 70 million subscribers in December 2021. In September 2022, 92 million households were counted as subscribers, but since this was announced, including subscribers to the HBO channel, it is expected that the actual population of Max alone will be much smaller. Netflix, founded by Reed Hastings and Marc Randolph, is a media streaming and video rental in 1997. Two years later, Netflix was offering the audience the possibility of an online subscription service. Subscribers could select movies and TV shows on Netflix's website and receive the chosen titles via DVDs in prepaid return envelopes. In 2007, Netflix's subscribers could watch some movies and TV shows online, directly from their homes. In 2010, Netflix launched an only-streaming plan with unlimited streaming services without DVDs. Starting from the United States, the only-streaming plan reached several countries; by 2016 more than 190 countries could use this service. In 2011, Netflix began to negotiate the production of original programming, starting with the series House of Cards. Paramount+ is a streaming service that is owned by the Paramount Global. The streaming service was launched on October 28, 2014, and was known as CBS All Access originally. At the time of the release, the platform focused primarily on streaming programs from local CBS stations as well as complete access to all CBS network content. In 2016 the streaming service created original content that could only be found by using the platform. As the network continued to expand with its content, the service decided to rebrand themselves and took the name Paramount+, taking its name from Paramount Pictures film studio. The network since expanded to Latin America, Europe and Australia. Peacock is a streaming service owned and operated by Peacock TV, which is a subsidiary of NBCUniversal Television and Streaming. The streaming service gets its name from the NBC logo based on its colors. The platform had launched on July 15, 2020. The streaming service primarily features content that can be found on NBC networking channels as well as other third-party sources. Additionally, Peacock now offers original content that cannot be found on any other streaming platform. In December 2022, Peacock reached 20 million paid subscribers. In March 2023, the platform had 22 million paid subscribers. The domain name of YouTube was bought and activated by Chad Hurley, Steve Chen, and Jawed Karim in the beginning of 2005. YouTube launched later that year as an online video sharing and social media platform. The video platform became popular among the audience thanks to a short video, called Lazy Sunday, uploaded by Saturday Night Live in December 2005. The SNL's video was not broadcast on TV, therefore people looked for it on Google by typing "SNL rap video," "Lazy Sunday SNL," or "Chronicles of Narnia SNL." The first result of searches was a link video on YouTube, which was the beginning of sharing videos on YouTube. Because of its popularity, YouTube had some issues caused by its bandwidth expenses. In 2006, Google bought YouTube, and after some months the video platform was the second-largest engine search in the world. Binge-watching In the 1990s, the practice of watching entire seasons in a short amount of time emerged with the introduction of the DVD box. Media-marathoning consists of watching at least one season of a TV show in a week or less, watching three or more films from the same series in a week or less, or reading three or more books from the same series in a month or less. The term "binge-watching" arrived with streaming TV, when Netflix launched its first original production, House of Cards, and started marketing this process of watching TV series episode after episode in 2013. COVID-19 gave another connotation to binge-watching, which was considered a negative activity. Broadcasting rights Broadcasting rights (also called Streaming rights in this case) vary from country to country and even within provinces of countries. These rights govern the distribution of copyrighted content and media and allow the sole distribution of that content at any one time. An example of content only being aired in certain countries is BBC iPlayer. The BBC checks a user's IP address to make sure that only users located in the UK can stream content from the BBC. The BBC only allows free use of their product for users within the UK as those users have paid for a television license that funds part of the BBC. This IP address check is not foolproof as the user may be accessing the BBC website through a VPN or proxy server. Broadcasting rights can also be restricted to allowing a broadcaster rights to distribute that content for a limited time. Channel 4's online service All 4 can only stream shows created in the US by companies such as HBO for thirty days after they are aired on one of the Channel 4 group channels. This is to boost DVD sales for the companies who produce that media. Some companies pay very large amounts for broadcasting rights with sports and US sitcoms usually fetching the highest price from UK-based broadcasters. A trend among major content producers in North America [when?] is the use of the "TV Everywhere" system. Especially for live content, the TV Everywhere system restricts viewership of a video feed to select Internet service providers, usually cable television companies that pay a retransmission consent or subscription fee to the content producer. This often has the negative effect of making the availability of content dependent upon the provider, with the consumer having little or no choice on whether they receive the product. Profits and costs With the advent of broadband Internet connections, multiple streaming providers have come onto the market in the last couple of years. The main providers are Netflix, Hulu, and Amazon Prime Video.[citation needed] Some of these providers such as Hulu advertise and charge a monthly fee. Other such as Netflix and Amazon Prime Video charge users a monthly fee and have no commercials. Netflix is the largest provider with more than 217 million subscribers. The rise of internet TV has resulted in cable companies losing customers to a new kind of customer called "cord cutters". Cord cutters are consumers who are cancelling their cable TV or satellite TV subscriptions and choosing instead to stream TV series, films and other content via the Internet. Cord cutters are forming communities. With the increasing availability of Online video platform (e.g., YouTube) and streaming services, there is an alternative to cable and satellite television subscriptions. Cord cutters tend to be younger people.[citation needed] As streaming services raise prices in order to increase profit, consumers have begun to look for cheaper alternatives, some opting for Free Ad-Supported Streaming Television (FAST) instead.[citation needed] This has also led to leading streaming services such as Disney+ and Hulu to implement ad-supported tiers. Concerns In recent years, customers have noticed shrinking content libraries and show cancellations. Examples include popular shows such as Westworld and originals such as Willow and The Mysterious Benedict Society. Often seen as a solution for cutting costs, streaming services remove assets with decreased earning power. Viewers and those involved in production have raised concerns surrounding this issue, creators losing out on "calling cards" and residual income; viewers having to invest in various platforms to watch select shows. Concerns about subscriber losses across services have also arisen, with Netflix being one of the many victims. Some argue that the surge in streaming is coming to an end due to the overabundance of media availability. Overview of platforms and availability See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Politics_of_United_States] | [TOKENS: 11975] |
Contents Politics of the United States In the United States, politics functions within a framework of a constitutional federal republic with a presidential system. The three distinct branches share powers: Congress, which forms the legislative branch, a bicameral legislative body comprising the House of Representatives and the Senate; the executive branch, which is headed by the president of the United States, who serves as the country's head of state and government; and the judicial branch, composed of the Supreme Court and lower federal courts, and which exercises judicial power. Each of the 50 individual state governments has the power to make laws within its jurisdiction that are not granted to the federal government nor denied to the states in the U.S. Constitution. Each state also has a constitution following the pattern of the federal constitution but differing in details. Each has three branches: an executive branch headed by a governor, a legislative body, and a judicial branch. At the local level, governments are found in counties or county-equivalents, and beneath them individual municipalities, county, townships, school districts, and special districts. Officials are popularly elected at the federal, state and local levels, with the major exception being the president, who is instead elected indirectly by the people through the Electoral College. American politics is dominated by two parties which since the American Civil War have been the Democratic Party and the Republican Party, although other parties have run candidates. Since the mid-20th century, the Democratic Party has generally supported left-leaning policies, while the Republican Party has generally supported right-leaning ones. Both parties have no formal central organization at the national level that controls membership, elected officials or political policies; thus, each party has traditionally had factions and individuals that deviated from party positions. Almost all public officials in America are elected from single-member districts and win office by winning a plurality of votes cast (i.e. more than any other candidate, but not necessarily a majority). Suffrage is nearly universal for citizens 18 years of age and older, with the notable exception of registered felons in some states. Federal government The United States is a constitutional federal republic, in which the president (the head of state and head of government), Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments. The federal government is divided into three branches, as per the specific terms articulated in the U.S. Constitution: The federal government's layout is explained in the Constitution. Two political parties, the Democratic Party and the Republican Party, have dominated American politics since the American Civil War, although other parties have existed. There are major differences between the political system of the United States and that of many other developed countries, including: The federal entity created by the U.S. Constitution is the dominant feature of the American governmental system, as citizens are also subject to a state government and various units of local government (such as counties, municipalities, and special districts). State government State governments have the power to make laws on all subjects that are not granted to the federal government nor denied to the states in the U.S. Constitution. These include education, family law, contract law, and most crimes. Unlike the federal government, which only has those powers granted to it in the Constitution, a state government has inherent powers allowing it to act unless limited by a provision of the state or national constitution. Like the federal government, state governments have three branches: executive, legislative, and judicial. The chief executive of a state is its popularly elected governor, who typically holds office for a four-year term (although in some states the term is two years). Except for Nebraska, which has unicameral legislature, all states have a bicameral legislature, with the upper house usually called the Senate and the lower house called the House of Representatives, the Assembly or something similar. In most states, senators serve four-year terms, and members of the lower house serve two-year terms. The constitutions of the various states differ in some details but generally follow a pattern similar to that of the federal Constitution, including a statement of the rights of the people and a plan for organizing the government, and are generally more detailed. At the state and local level, the process of initiatives and referendums allow citizens to place new legislation on a popular ballot, or to place legislation that has recently been passed by a legislature on a ballot for a popular vote. Initiatives and referendums, along with recall elections and popular primary elections, are signature reforms of the Progressive Era; they are written into several state constitutions, particularly in the Western states, but not found at the federal level. Local government The United States Census Bureau conducts the Census of Governments every five years, categorizing four types of local governmental jurisdictions below the level of the state: In 2010, there were 89,500 total local governments, including 3,033 counties, 19,492 municipalities, 16,500 townships, 13,000 school districts, and 37,000 other special districts. Local governments directly serve the needs of the people, providing everything from police and fire protection to sanitary codes, health regulations, education, public transportation, and housing. Typically local elections are nonpartisan — local activists suspend their party affiliations when campaigning and governing. The county is the administrative subdivision of the state, authorized by state constitutions and statutes. The county equivalents in Louisiana are called parishes, while those in Alaska are called boroughs. The specific governmental powers of counties vary widely between the states. In some states, mainly in New England, they are primarily used as judicial districts. In other states, counties have broad powers in housing, education, transportation and recreation. County government has been eliminated throughout Connecticut, Rhode Island, and in parts of Massachusetts; while the Unorganized Borough area of Alaska (which makes up about a half of the area of the state) does not operate under a county-level government at all. In areas that do not have any county governmental function and are simply a division of land, services are provided either by lower level townships or municipalities, or the state. Counties may contain a number of cities, towns, villages, or hamlets. Some cities—including Philadelphia, Honolulu, San Francisco, Nashville, and Denver—are consolidated city-counties, where the municipality and the county have been merged into a unified, coterminous jurisdiction—that is to say, these counties consist in their entirety of a single municipality whose city government also operates as the county government. Some counties, such as Arlington County, Virginia, do not have any additional subdivisions. Some states contain independent cities that are not part of any county; although it may still function as if it was a consolidated city-county, an independent city was legally separated from any county. Some municipalities are in multiple counties; New York City is uniquely partitioned into five boroughs that are each coterminous with a county. In most U.S. counties, one town or city is designated as the county seat, and this is where the county government offices are located and where the board of commissioners or supervisors meets. In small counties, boards are chosen by the county; in the larger ones, supervisors represent separate districts or townships. The board collects taxes for state and local governments; borrows and appropriates money; fixes the salaries of county employees; supervises elections; builds and maintains highways and bridges; and administers national, state, and county welfare programs. In very small counties, the executive and legislative power may lie entirely with a sole commissioner, who is assisted by boards to supervise taxes and elections. Town or township governments are organized local governments authorized in the state constitutions and statutes of 20 Northeastern and Midwestern states, established as minor civil divisions to provide general government for a geographic subdivision of a county where there is no municipality. In New York, Wisconsin and New England, these county subdivisions are called towns. In many other states, the term town does not have any specific meaning; it is simply an informal term applied to populated places (both incorporated and unincorporated municipalities). Moreover, in some states, the term town is equivalent to how civil townships are used in other states. Like counties, the specific responsibilities to townships vary based on each state. Many states grant townships some governmental powers, making them civil townships, either independently or as a part of the county government. In others, survey townships are non-governmental. Towns in the six New England states and townships in New Jersey and Pennsylvania are included in this category by the Census Bureau, despite the fact that they are legally municipal corporations, since their structure has no necessary relation to concentration of population, which is typical of municipalities elsewhere in the United States. In particular, towns in New England have considerably more power than most townships elsewhere and often function as legally equivalent to cities, typically exercising the full range of powers that are divided between counties, townships, and cities in other states. Township functions are generally overseen by a governing board, whose name also varies from state to state. Municipal governments are organized local governments authorized in state constitutions and statutes, established to provide general government for a defined area, generally corresponding to a population center rather than one of a set of areas into which a county is divided. The category includes those governments designated as cities, boroughs (except in Alaska), towns (except in Minnesota and Wisconsin), and villages. This concept corresponds roughly to the "incorporated places" that are recognized in by the U.S. Census Bureau, although the Census Bureau excludes New England towns from their statistics for this category, and the count of municipal governments excludes places that are governmentally inactive. About 28 percent of Americans live in cities of 100,000 or more population.[when?] Types of city governments vary widely across the nation. Almost all have a central council, elected by the voters, and an executive officer, assisted by various department heads, to manage the city's affairs. Cities in the West and South usually have nonpartisan local politics. There are three general types of municipal government: the mayor-council, the commission, and the council-manager. These are the pure forms; many cities have developed a combination of two or three of them. This is the oldest form of city government in the United States and, until the beginning of the 20th century, was used by nearly all American cities. Its structure is like that of the state and national governments, with an elected mayor as chief of the executive branch and an elected council that represents the various neighborhoods forming the legislative branch. The mayor appoints heads of city departments and other officials (sometimes with the approval of the council), has the power to veto over ordinances (the laws of the city), and often is responsible for preparing the city's budget. The council passes city ordinances, sets the tax rate on property, and apportions money among the various city departments. As cities have grown, council seats have usually come to represent more than a single neighborhood. This combines both the legislative and executive functions in one group of officials, usually three or more in number, elected city-wide. Each commissioner supervises the work of one or more city departments. Commissioners also set policies and rules by which the city is operated. One is named chairperson of the body and is often called the mayor, although their power is equivalent to that of the other commissioners. The city manager is a response to the increasing complexity of urban problems that need management ability not often possessed by elected public officials. The answer has been to entrust most of the executive powers, including law enforcement and provision of services, to a highly trained and experienced professional city manager. The council-manager plan has been adopted by a large number of cities. Under this plan, a small, elected council makes the city ordinances and sets policy, but hires a paid administrator, also called a city manager, to carry out its decisions. The manager draws up the city budget and supervises most of the departments. Usually, there is no set term; the manager serves as long as the council is satisfied with their work. Some states contain unincorporated areas, which are areas of land not governed by any local authorities below that at the county level. Residents of unincorporated areas only need to pay taxes to the county, state and federal governments as opposed to the municipal government as well. A notable example of this is Paradise, Nevada, an unincorporated area where many of the casinos commonly associated with Las Vegas are situated. In addition to general-purpose government entities legislating at the state, county, and city level, special-purpose areas may exist as well, provide one or more specific services that are not being supplied by other existing governments. School districts are organized local entities providing public elementary and secondary education which, under state law, have sufficient administrative and fiscal autonomy to qualify as separate governments. Special districts are authorized by state law to provide designated functions as established in the district's charter or other founding document, and with sufficient administrative and fiscal autonomy to qualify as separate governments; known by a variety of titles, including districts, authorities, boards, commissions, etc., as specified in the enabling state legislation. Unincorporated territories The United States possesses a number of unincorporated territories, including 16 island territories across the globe. These are areas of land which are not under the jurisdiction of any state, and do not have a government established by Congress through an organic act. Citizens of these territories can vote for members of their own local governments, and some can also elect representatives to serve in Congress—though they only have observer status. The unincorporated territories of the U.S. include the permanently inhabited territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands; as well as minor outlying islands such as Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, Midway Atoll, Navassa Island, Palmyra Atoll, Wake Island, and others. American Samoa is the only territory with a native resident population and is governed by a local authority. Despite the fact that an organic act was not passed in Congress, American Samoa established its own constitution in 1967, and has self governed ever since. Seeking statehood or independence is often debated in US territories, such as in Puerto Rico, but even if referendums on these issues are held, congressional approval is needed for changes in status to take place. The citizenship status of residents in US unincorporated territories has caused concern for their ability to influence and participate in the politics of the United States. In recent decades, the Supreme Court has established voting as a fundamental right of US citizens, even though residents of territories do not hold full voting rights. Despite this, residents must still abide by federal laws that they cannot equitably influence, as well as register for the national Selective Service System, which has led some scholars to argue that residents of territories are essentially second-class citizens. The legal justifications for these discrepancies stem from the Insular Cases, which were a series of 1901 Supreme Court cases that some consider to be reflective of imperialism and racist views held in the United States. Unequal access to political participation in US territories has also been criticized for affecting US citizens who move to territories, as such an action requires forfeiting the full voting rights that they would have held in the 50 states. Elections As in the United Kingdom and in other similar parliamentary systems, in the U.S. Americans eligible to vote, vote for an individual candidate (there are sometimes exceptions in local government elections)[note 1] and not a party list. The U.S. government being a federal government, officials are elected at the federal (national), state and local levels. All members of Congress, and the offices at the state and local levels are directly elected, but the president is elected indirectly, by an Electoral College whose electors represent their state and are elected by popular vote. (Before the Seventeenth Amendment was passed, Senators were also elected indirectly, by state legislatures.) These presidential electors were originally expected to exercise their own judgement. In modern practice, though, the electors are chosen by their party and pledged to vote for that party's presidential candidate (in rare occurrences they may violate their pledge, becoming a faithless elector). Both federal and state laws regulate elections. The United States Constitution defines (to a basic extent) how federal elections are held, in Article One and Article Two and various amendments. State law regulates most aspects of electoral law, including primaries, the eligibility of voters (beyond the basic constitutional definition), the running of each state's electoral college, and the running of state and local elections. Who has the right to vote in the United States is regulated by the Constitution and federal and state laws. Suffrage is nearly universal for citizens 18 years of age and older. Voting rights are sometimes restricted as a result of felony conviction, depending on the state. The District, and other U.S. holdings like Puerto Rico and Guam, do not have the right to choose any political figure outside their respective areas and can only elect a non-voting delegate to serve in the House of Representatives. All states and the District of Columbia contribute to the electoral vote for president. Successful participation, especially in federal elections, often requires large amounts of money, especially for television advertising. This money can be very difficult to raise by appeals to a mass base, although appeals for small donations over the Internet have been successful. Opponents of campaign finance laws allege they interfere with the First Amendment's guarantee of free speech. Even when laws are upheld, the complication of compliance with the First Amendment requires careful and cautious drafting of legislation, leading to laws that are still fairly limited in scope, especially in comparison to those of other developed democracies such as the United Kingdom, France or Canada. Political parties, pressure groups The United States Constitution never formally addressed the issue of political parties, primarily because the Founding Fathers opposed them. Nevertheless, parties—specifically, two competing parties in a "two-party system"—have been a fundamental part of American politics since shortly after George Washington's presidency. In partisan elections, candidates are nominated by a political party or seek public office as independents. Each state has significant discretion in deciding how candidates are nominated and thus eligible to appear on a given election ballot. Major party candidates are typically formally chosen in a party primary or convention, whereas candidates from minor parties and Independent candidates must complete a petitioning process. The current two-party system in the United States is made up of the Democratic Party and the Republican Party. These two parties have won every United States presidential election since 1852 and have controlled the United States Congress since at least 1856. From time to time, a third party, such as the Green and Libertarian Parties, has achieved some minor representation at the national and state levels. Since the Great Depression and the New Deal, and increasingly since the 1960s, the Democratic Party has generally positioned itself as a center-left party, while the Republican Party has generally positioned itself as center-right; there are other factions within each. Unlike in many other countries, the major political parties in America have no strong central organization that determines party positions and policies, rewards loyal members and officials, or expels rebels. A party committee or convention may endorse a candidate for office, but deciding who will be the party's candidate in the general election is usually done in primaries open to voters who register as Democrats or Republicans. Furthermore, elected officials who fail to "toe the party line" because of constituent opposition said line and "cross the aisle" to vote with the opposition have (relatively) little to fear from their party. Parties have state or federal committees that act as hubs for fundraising and campaigning (see Democratic National Committee and Republican National Committee) and separate campaign committees that work to elect candidates at a specific level but do not direct candidates or their campaigns. In presidential elections, the party's candidate serves as the de facto party leader, whose popularity or lack thereof helps or hinders candidates further down the ballot. Midterm elections are usually considered a referendum on the sitting president's performance. Some (e.g., Lee Drutman and Daniel J. Hopkins before 2018) argue that, in the 21st century, along with becoming overtly partisan, American politics has become overly focused on national issues and "nationalized" that even local offices, formerly dealing with local matters, now often mention the presidential election. "Third" political parties have appeared from time to time in American history but seldom lasted more than a decade. They have sometimes been the vehicle of an individual (Theodore Roosevelt's "Bull Moose" party, Ross Perot's Reform Party); had considerable strength in particular regions (Socialist Party, the Farmer-Labor Party, Wisconsin Progressive Party, Conservative Party of New York State,[note 2] and the Populist Party); or continued to run candidates for office to publicize some issue despite seldom winning even local elections (Libertarian Party, Natural Law Party, Peace and Freedom Party). Factors reinforcing the two-party system include: Special-interest groups advocate the cause of their specific constituency. Business organizations, for example, will favor low corporate taxes and restrictions on the right to strike, whereas labor unions will support minimum wage legislation and protection for collective bargaining. Other private interest groups, such as churches and ethnic groups, are more concerned about broader policy issues affecting their organizations or beliefs. One type of private interest group that has grown in number and influence in recent years is the political action committee or PAC. These are independent groups organized around a single issue or set of issues, which contribute money to political campaigns for United States Congress or the presidency. PACs are limited in the amounts they can contribute directly to candidates in federal elections. There are no restrictions on the amounts PACs can spend independently to advocate a point of view or to urge the election of candidates to office. As of 2008, 4,292 PACs were operating in the U.S. The number of interest groups has mushroomed, with more and more of them operating offices in Washington, D.C., and representing themselves directly to Congress and federal agencies. Many organizations that keep an eye on Washington seek financial and moral support from ordinary citizens. Since many of them focus on a narrow set of concerns or even on a single issue, and often a single issue of enormous emotional weight, they compete with the parties for citizens' dollars, time, and passion. In 2024, lobbyist groups spent a record $4.4 billion lobbying federal lawmakers, who are required to raise large amounts of money, especially on election years, with average winning budget being $2.7 million for the House of Representatives and $26.5 million for Senate. Candidates running for office are rewarded with funding if they align their regulatory views with those of powerful special interest groups. As a result, elected officials spend disproportionate amount of effort satisfying interests of wealthy lobbyist groups as opposed to serving their constituents, ordinary citizens. A survey of members of the American Economic Association (i.e., the Association of Professional Economists) found the vast majority—regardless of political affiliation—felt the prevalence and influence of special interest groups in the political process led to benefits for the special interest groups and politicians at the expense of society as a whole. Despite the First Amendment of the constitution's Establishment Clause ("Congress shall make no law respecting an establishment of religion ..."), for historical and demographic reasons, religious groups (primarily Christian groups) have frequently become political pressure groups and they have also become parts of political coalitions. In recent decades, conservative evangelicals have been particularly active within the broader Republican Party. This influence has often translated into the passing of laws related to morality and personal conduct. State alcohol and gambling laws, for example, are more restrictive in states with a higher percentage of conservative Christians. History, development and evolution The American political culture is rooted in the colonial experience and the American Revolution. The colonies were unique within the European world for their (relatively) widespread suffrage which was granted to white male property owners, and the relative power and activity of the elected bodies which they could vote for. These dealt with land grants, commercial subsidies, taxation, the oversight of roads, poor relief, taverns, and schools. Courts, (private lawsuits were very common) also provided Americans with experience in public affairs and law, and gave interest groups such as merchants, landlords, petty farmers, artisans, Anglicans, Presbyterians, Quakers, Germans, Scotch Irish, Yankees, Yorkers, etc. control over matters left to the royal court, aristocratic families and the established church in Great Britain. Finally, Americans were interested in the political values of Republicanism, which celebrated equal rights, civic virtue, and abhorred corruption, luxury, and aristocracy. Two pivotal political ideas in the establishment of the United States were Republicanism and classical liberalism. Central documents of American thought include: the Declaration of Independence (1776), the Constitution (1787), the Federalist and Anti-Federalist Papers (1787–1790s), the Bill of Rights (1791), and Lincoln's "Gettysburg Address" (1863). Among the core tenets were: At the time of the United States' founding, the economy was predominantly one of agriculture and small private businesses, and state governments left welfare issues to private or local initiative. As in the UK and other industrialized countries, laissez-faire ideology was largely discredited during the Great Depression. Between the 1930s and 1970s, fiscal policy was characterized by the Keynesian consensus. After the "Reagan revolution" in the early 1980s, laissez-faire ideology once more became a powerful force in American politics. While the American welfare state expanded more than threefold after WWII, it held at 20% of GDP from the late 1970s to late 1980s. In the 21st century, modern American liberalism, and modern American conservatism are engaged in a continuous political battle, characterized by what The Economist describes as "greater divisiveness [and] close, but bitterly fought elections." Since 2016, the United States has been recognized as a flawed democracy in the Democracy Index by the Economist Intelligence Unit, partially due to increased political polarization. According to the V-Dem Democracy indices the United States were 2023 the 27th most electoral democratic country and 3rd most participatory democracy in the world. In foreign affairs, the United States generally pursued a noninterventionist policy of "avoiding foreign entanglements" before World War II. After the war, when America became a superpower, for many decades the country embraced internationalism, seeking allies to contain Communism and foster economic cooperation. The United States Constitution never formally addressed the issue of political parties, primarily because the Founding Fathers—Alexander Hamilton, James Madison, George Washington—opposed them as domestic political factions leading to domestic conflict and stagnation. Nevertheless, the beginnings of the American two-party system emerged from Washington's immediate circle of advisers, including Hamilton and Madison. By the 1790s, different views of the new country's proper course had already developed, with those holding the same views banding together. The followers of Alexander Hamilton (the "Federalist") favored a strong central government that would support the interests of commerce and industry. The followers of Thomas Jefferson, ("Democratic-Republicans") preferred a decentralized agrarian republic. By 1828, the Federalists had disappeared as an organization, replaced first by the National Republican Party and then by the Whigs, while the Democratic Republicans evolved into the Democrats led by Andrew Jackson, and known for celebrating "the common (white) man" and the expansion of suffrage to most of them. In the 1850s, it was the Whigs' turn to disappear, undone by the issue of whether slavery should be allowed to expand into the country's new territories in the West. The Whigs were eventually replaced by the Republican Party which opposed slavery expansion and whose first successful candidate for the presidency was Abraham Lincoln. In the 150+ years since the Democratic and Republican parties have been America's two major parties, though their policies, base of support and relative strength have changed considerably. Some eras in American politics include: In pre-colonial and post-revolutionary American times, voters went to the polls and publicly stated which candidate they supported, rather than voting secretly, which was considered "cowardly" and "underhanded". Originally, state laws required voters to be property owners, but "by the time Andrew Jackson was elected President, in 1828, nearly all white men could vote". Later in the 19th century, voting was done by written paper ballot. A broadened franchise where many voters were illiterate or misspelling disqualified a vote, led to the use of printed ballots. Each political party would create its own ballot—preprinted "party tickets"—give them to supporters, and who would publicly put the party's ballot into the voting box, or hand them to election judges through a window. The tickets indicated a vote for all of that party's slate of candidates, preventing "ticket splitting". (As of 1859 "nowhere in the United States ... did election officials provide ballots", i.e. they all came from political parties.) In cities voters often had to make their way through a throng of partisans who would try to prevent supporters of the opposing party from voting, a practice generally allowed unless it "clearly" appeared "that there was such a display of force as ought to have intimidated men of ordinary firmness." The practice was dangerous enough that in "the middle decades of the nineteenth century," several dozen (89) were killed in Election Day riots. It was not until the late nineteenth century that states began to adopt the Australian secret-ballot method (despite fears it "would make any nation a nation of scoundrels"), and it eventually became the national standard. The secret ballot method ensured that the privacy of voters would be protected (hence government jobs could no longer be awarded to loyal voters), and each state would be responsible for creating one official ballot. Some key events of suffrage expansion are: Concerns, problems and criticism Ongoing concerns include lack of representation in the U.S. territories and the District of Columbia; fear that the interests of some are overrepresented, while others are underrepresented; a fear that certain features of the American political system make it less democratic, a fear that a small cultural elite has undermined traditional values, and whether policy and law-making is dominated by a small economic elite molding it to their interests. Greater representation given to small states in the Senate and the Electoral College, "first-past-the-post" voting, gerrymandering, etc.—have in recent years had a more extreme effect and have begun to create a disconnect between what the government does (in legislation and court rulings) and what the majority of Americans want. In an August 31, 2022, poll by Quinnipiac University, 69 percent of Democrats and 69 percent of Republicans replied yes to the question "Do you think the nation's democracy is in danger of collapse". A 2020 study, "Global Satisfaction with Democracy" by the Bennett Institute for Public Policy at the University of Cambridge, found that for the first time on record, polls show a majority of Americans dissatisfied with their system of government—a system of which they were once famously proud. Such levels of democratic dissatisfaction would not be unusual elsewhere. But for the United States, it marks an "end of exceptionalism"—a profound shift in America's view of itself, and therefore, of its place in the world. Concerns about the American political system include how well it represents and serves the interests of Americans. They include: More recently, concerns have included: Observations of historical trends and current governmental demographics have raised concerns about the equity of political representation in the United States. In particular, scholars have noted that levels of descriptive representation—which refers to when political representatives share demographic backgrounds or characteristics with their constituents—do not match the racial and gender makeup of the US. Descriptive representation is noted to be beneficial because of its symbolic representative benefits as a source of emotional identification with one's representatives. Furthermore, descriptive representation can lead to more substantive and functional representation, as well as greater institutional power, which can result in minority constituents having both representatives with matching policy views and power in the political system. Serving as a congressional committee chair is considered to be a good example of this relationship, as chairs control which issues are addressed by committees, especially through hearings that bring substantial attention to certain issues. Though minorities like African Americans and Latinos have rarely served as committee chairs, studies have shown that their presence has directly led to significantly higher likelihoods of minority issues being addressed. Given that racial and ethnic minorities of all backgrounds have historically been marginalized from participating in the US political system, their political representation and access to policymaking has been limited. Similarly, women lack proportional representation in the United States, bringing into question the extent to which women's issues are adequately addressed. Other minority groups, such as the LGBTQ community, have also been disadvantaged by an absence of equitable representation—especially since scholars have noted their gradual shift from originally being perceived as more of a moral political issue to being considered an actual constituency. Political representation is also an essential part of making sure that citizens have faith that representatives, political institutions, and democracy take their interests into account. For women and minorities, this issue can occur even in the levels of government that are meant to be closest to constituents, such as among members of Congress in the House of Representatives. Scholars have noted that in positions such as these, even close proximity to constituents does not necessarily translate to an understanding of their needs or experiences and that constituents can still feel unrepresented. In a democracy, a lack of faith in one's representatives can cause them to search for less-democratic alternative forms of representation, like unelected individuals or interest groups. For racial and ethnic minorities, the risk of seeking alternative representation is especially acute, as lived experiences often lead to different political perspectives that can be difficult for white representatives to fully understand or adequately address. Moreover, studies have begun to increasingly show that people of all races and genders tend to prefer having members of Congress who share their race or gender, which can also lead to more engagement between constituents and their representatives, as well as higher likelihoods of contacting or having faith in their congressperson. In addition to making it more likely that constituents will trust their representatives, having descriptive representation can help sustain an individual's positive perceptions of government. When considering women in particular, it has been suggested that broader economic and social equality could result from first working toward ensuring more equitable political representation for women, which would also help promote increased faith between women and their representatives. Although African Americans have begun to continually win more elected positions and increase their overall political representation, they still lack proportional representation across a variety of different levels of government. Some estimates indicate that most gains for African Americans—and other minorities in general—have not occurred at higher levels of government, but rather at sub-levels in federal and state governments. Additionally, congressional data from 2017 revealed that 35.7% of African Americans nationwide had a congressperson of the same race, while the majority of black Americans were represented by members of Congress of a different race. Scholars have partially explained this discrepancy by focusing on the obstacles that black candidates face. Factors like election type, campaign costs, district demographics, and historical barriers, such as voter suppression, can all hinder the likelihood of a black candidate winning an election or even choosing to enter into an election process. Demographics, in particular, are noted to have a large influence on black candidate success, as research has shown that the ratio of white-to-black voters can have a significant impact on a black candidate's chance of winning an election and that large black populations tend to increase the resources available to African American candidates. Despite the variety of obstacles that have contributed to the lack of proportional representation for African Americans, other factors have been found to increase the likelihood of a black candidate winning an election. Based on data from a study in Louisiana, prior black incumbency, as well as running for an office that other black candidates had pursued in the past, increased the likelihood of African Americans entering into races and winning elections. As the most populous minority demographic identified in the 2010 US Census, Hispanic and Latino Americans have become an increasingly important constituency that is spread throughout the United States. Despite also constituting 15% of the population in at least a quarter of House districts, Latino representation in Congress has not correspondingly increased. Furthermore, in 2017, Latino members of Congress only represented about one-quarter of the total Latino population in the US. While there are many potential explanations for this disparity, including issues related to voter suppression, surveys of Latino voters have identified trends unique to their demographic—though survey data has still indicated that descriptive representation is important to Hispanic and Latino voters. While descriptive representation may be considered important, an analysis of a 2004 national survey of Latinos revealed that political participation and substantive representation were strongly associated with each other, possibly indicating that voters mobilize more on behalf of candidates whose policy views reflect their own, rather than for those who share their ethnic background. Moreover, a breakdown of the rationale for emphasizing descriptive representation reveals additional factors behind supporting Latino candidates, such as the view that they may have a greater respect and appreciation for Spanish or a belief that Latinos are "linked" together, indicating the significance of shared cultural experiences and values. Although the reasons behind choosing to vote for Latino candidates are not monolithic, the election of Latinos to Congress has been identified as resulting in benefits for minorities overall. While it has been argued that unique district-related issues can take equal or greater precedence than Latino interests for Hispanic and Latino members of Congress, studies have also shown that Latinos are more likely to support African American members of Congress—and vice versa—beyond just what is expected from shared party membership. Similar to other minority groups, Native Americans often lack representation due to electoral policies. Gerrymandering, in particular, is noted as a method of concentrating Native voters in a limited number of districts to reduce their ability to influence multiple elections. Despite structural efforts to limit their political representation, some states with large Native American populations have higher levels of representation. South Dakota has a Native population of about 9% with multiple federally recognized tribal nations, and it has been used as a case study of representation. A 2017 study that conducted interviews of former state elected officials in South Dakota revealed that even though many felt that they were only able to implement a limited number of significant changes for tribal communities, they still considered it to be "absolutely essential" that Native Americans had at least some descriptive representation to prevent complete exclusion from the political process. Moreover, formerly elected state and local government officials asserted that ensuring that the issues and concerns of tribal nations were addressed and understood depended on politicians with Native backgrounds. Historically backed suspicion and skepticism of the predominantly white US government was also considered to be an important reason for having representatives that reflect the histories and views of Native Americans. Relative to other, larger minority demographics in the United States, Asian Americans and Pacific Islanders (AAPI) face different challenges related to political representation. Few congressional districts have a population that includes over 50% Asian Americans, which can elevate the likelihood of being represented by someone of a different race or ethnicity. As with other minorities, this can result in people feeling unrepresented by their member of Congress. Women have made continual socioeconomic progress in many key areas of society, such as in employment and education, and in comparison to men, women have voted at higher rates for over forty years—making their lack of more proportional representation in the political system surprising. Some scholars have partially attributed this discrepancy to the electoral system in the United States, as it does not provide a mechanism for the types of gender quotas seen in other countries. Additionally, even though gerrymandering and concentrated political representation can essentially ensure at least some representation for minority racial and ethnic groups, women—who are relatively evenly spread throughout the United States—do not receive similar benefits from this practice. Identifying the source of unequal gender representation of individuals can be predicted along party and ideological lines. A survey of attitudes toward women candidates revealed that Democrats are more likely to attribute systemic issues to gender inequalities in political representation, while Republicans are less likely to hold this perspective. While identifying an exact source of inequality may ultimately prove unlikely, some recent studies have suggested that the political ambitions of women may be influenced by the wide variety of proposed factors attributed to the underrepresentation of women. In contrast to attributing specific reasons to unequal representation, political party has also been identified as a way of predicting if a woman running for office is more likely to receive support, as women candidates are more likely to receive votes from members of their party and Independents. Social inequality and sexism have been noted by scholars as influencing the electoral process for women. In a survey of attitudes toward women candidates, women respondents were far more likely to view the process of running for office as "hostile" to women than men, especially when considering public hesitancy to support women candidates, media coverage, and public discrimination. Political fundraising for candidates is also an area of inequality, as men donate at a higher rate than women—which is compounded by gender and racial inequalities related to income and employment. Recent increases in woman-focused fundraising groups have started to alter this imbalance. Given that disproportionate levels of household labor often become the responsibility of women, discrimination within households has also been identified as a major influence on the capability of women to run for office. For women in the LGBTQ community, some scholars have raised concern about the unequal attention paid to the needs of lesbians compared to transgender, bisexual, and queer women, with lesbian civil rights described as receiving more of a focus from politicians. Social pressures are another influence on women who run for office, often coinciding with sexism and discrimination. Some scholars have argued that views of discrimination have prompted a decrease in the supply of women willing to run for office, though this has been partially countered by those who argue that women are actually just more "strategic" when trying to identify an election with favorable conditions. Other factors, like the overrepresentation of men, have been described as influencing perceptions of men as somehow inherently more effective as politicians or leaders, which some scholars argue could pressure women to stay out of elections. Others contend that the overrepresentation of men can actually result in "political momentum" for women, such as during the Year of the Woman. Within some racial and ethnic groups, social influences can also shape political engagement. Among Latinos, Latinas are more likely to partake in non-electoral activities, like community organizing, when compared to men. Despite differences in political activity and social pressures, elected women from both political parties have voiced their support for electing more women to Congress to increase the acceptance of their voices and experiences. Furthermore, studies have found that increasing the descriptive representation of women can provide positive social influences for democracy as a whole, such as improved perceptions of an individual's political efficacy and government's responsiveness to the needs of people. When women can vote for a woman candidate of the same party, studies have also found that these influences can be magnified. Although some scholars have disputed the benefits of descriptive representation, only a small number have argued that this form of representation actually has negative impacts on the group it represents. Studies of bills relating to LGBT rights in state legislatures have provided a more nuanced analysis. Pro-LGBT bills tend to be introduced in higher numbers when more LGBT representatives are elected to state legislatures, which may also indicate an increased likelihood of substantive representation. Increases in openly LGBT state lawmakers have also been hypothesized to inadvertently result in more anti-LGBT legislation, potentially as the result of backlash to their presence. Despite the risk of negative consequences, at least one study has concluded that the LGBT community receives net-benefits from increased openly LGBT representation. On the federal level, the presence of the Congressional LGBTQ+ Equality Caucus has been identified as improving the ability of Congress to address the intersectional issues faced by the LGBT community, as well as provide a source of pressure other than constituency on members of Congress to address LGBT issues. Additionally, non-LGBT members of the caucus have been criticized for not sponsoring enough legislation, emphasizing the value of openly LGBT members of Congress. While descriptive representation has provided benefits overall, scholars have noted that some groups in the community, such as transgender and bisexual people, tend to receive less focus than gays and lesbians. At least two "well-regarded" global democracy indices — V-Dem Democracy indices, and Democracy Index (The Economist) — "show an erosion of American democracy since 2016". A disconnect between "the power to set government policy" and political opinions of the general public has been noted by commentators and scholars (such as David Leonhardt). The United States is "far and away the most countermajoritarian democracy in the world," according to Steven Levitsky. Before the 2000 election, only three candidates for president won "while losing the popular vote (John Quincy Adams, Rutherford Hayes and Benjamin Harrison), and each served only a single term", while as of 2022 "two of the past four presidents have taken office despite losing the popular vote" - George W. Bush in 2000 and Donald Trump in 2016. Leonhardt points out that in one branch of the federal government—the Supreme Court—conservative legal decisions "both sweeping and, according to polls, unpopular" were delivered in 2022, what is likely the beginning of a reshaping of "American politics for years, if not decades" to come by the court's "Republican appointees". This is despite the fact that the president appoints the nominees, and that presidential candidates of the Democratic Party have won the popular vote in seven out of eight last elections (from 1992 to 2020). In the 2020 U.S. Senate, "50 Democratic senators effectively represent 186 million Americans, while the 50 Republican senators effectively represent 145 million". Explanations include: In 2014, United Press International reported that the political structure of the United States has become an oligarchy, where a small economic elite overwhelmingly dominate policy and law. Some academic researchers and Oxfam suggest a drift toward oligarchy has been occurring by way of the influence of corporations, wealthy, and other special interest groups, leaving individual citizens with less impact than economic elites and organized interest groups in the political process. An April 2014 study by political scientists Martin Gilens (Princeton University) and Benjamin Page (Northwestern University) concluded that the U.S. government does not represent the interests of the majority of its citizens but instead is "ruled by those of the rich and powerful". The researchers after analyzing nearly 1,800 U.S. policies between 1981 and 2002, stated that government policies tend to favour special interests and lobbying organizations, and that whenever a majority of citizens disagrees with the economic elites, the elites tend to prevail in getting their way. While not characterizing the United States as an "oligarchy" or "plutocracy" outright, Gilens and Page give weight to the idea of a "civil oligarchy" as used by Jeffrey A. Winters, saying, "Winters has posited a comparative theory of 'Oligarchy,' in which the wealthiest citizens—even in a 'civil oligarchy' like the United States—dominate policy concerning crucial issues of wealth- and income-protection." In their study, Gilens and Page reached these conclusions: When a majority of citizens disagrees with economic elites and/or with organized interests, they generally lose. Moreover, because of the strong status quo bias built into the US political system, even when fairly large majorities of Americans favor policy change, they generally do not get it. ... [T]he preferences of the average American appear to have only a minuscule, near-zero, statistically non-significant impact upon public policy. E. J. Dionne Jr. described what he considers the effects of ideological and oligarchical interests on the judiciary. The journalist, columnist, and scholar interprets recent Supreme Court decisions as ones that allow wealthy elites to use economic power to influence political outcomes in their favor. In speaking about the Supreme Court's McCutcheon v. FEC and Citizens United v. FEC decisions, Dionne wrote: "Thus has this court conferred on wealthy people the right to give vast sums of money to politicians while undercutting the rights of millions of citizens to cast a ballot." Nobel Prize–winning economist Paul Krugman wrote: The stark reality is that we have a society in which money is increasingly concentrated in the hands of a few people. This threatens to make us a democracy in name only. A November 2022 study by Pew Research Center showed that majorities in both the Republican and Democratic parties held increasingly negative views of major financial institutions and large corporations. Gerrymandering is the practice of shaping the boundaries of electoral districts for partisan advantage—those boundaries being reviewed and usually changed after every United States census, i.e. every ten years. Gerrymandering involves what's commonly called "cracking and packing". Used almost since the founding of the United States (the term was coined in 1810 after a review of Massachusetts's redistricting maps of 1812 set by Governor Elbridge Gerry noted that one of the districts looked like a salamander), in the 21st century it has "become a much more effective tool". Since 2010, detailed maps and high-speed computing have facilitated gerrymandering by political parties in the redistricting process, in order to gain control of state legislation and congressional representation and potentially to maintain that control over several decades, even against shifting political changes in a state's population. It allows the drawing of districts "with surgical precision". According to Julia Kirschenbaum and Michael Li of the Brennan Center In 2010, Republicans—in an effort to control the drawing of congressional maps—forged a campaign to win majorities in as many state legislatures as possible. It was wildly successful, giving them control over the drawing of 213 congressional districts. The redrawing of maps that followed produced some of the most extreme gerrymanders in history. In battleground Pennsylvania, for example, the congressional map gave Republicans a virtual lock on 13 of the state's 18 congressional districts, even in elections where Democrats won the majority of the statewide congressional vote. Attempts to appeal to the Supreme Court to disallow gerrymandering in cases such as Vieth v. Jubelirer in 2004 and its passing up of "numerous opportunities" in 2017 and 2018 "to decide upon the constitutional legality or illegality of gerrymandering" has "emboldened ever more partisan gerrymandering". In addition to giving one party power beyond its popular support, gerrymandering has been criticized for weakening the political power of minority voters by concentrated them into district(s) (though this process can also help ensure the election of a representative of the same race). Since the 1970s, the United States has grown more polarized, with rapid increases in polarization during the 2000s onward. As a general rule, urban areas and suburbs have become more "blue", Democratic or liberal, while agricultural rural areas have become more "red", Republican or conservative. Since many states have no large or extensive urban areas the result is that there are many "red" states in the south and Midwest, while coastal states which contain extensive urbanized areas tend to be "blue." Rural areas with a recreational focus such as ski resorts are an exception to the general rule. The polarization has been both more ideological (differences between the policy positions) and affective (i.e. a dislike and distrust of opposing political groups), than comparable democracies. Polarization among U.S. legislators is asymmetric, as it has primarily been driven by a substantial rightward shift among congressional Republicans, alongside a much smaller leftward shift among congressional Democrats. New Democrats advocated for neoliberal policies including financial deregulation and free trade, which is seen to have shifted the Democratic Party rightward on economic issues. Since the early 2010s, the party has shifted significantly to the left on social, cultural, and religious issues. According to the Pew Research Center, members of both parties who have unfavorable opinions of the opposing party have doubled since 1994, while those who have very unfavorable opinions of the opposing party are at record highs as of 2022. Many commentators and scholars (such as David Leonhardt) have expressed alarm at the "growing movement inside one of the country's two major parties—the Republican Party—to refuse to accept defeat in an election". In a survey by journalists (of the Washington Post) less than two months before the 2022 congressional election, a "majority of Republicans" in "important battleground" election campaigns, refused "to say they will accept the November election outcome". Six key Senate and gubernatorial Republican party nominees refused to commit to accepting the results of the November election: Blake Masters in Arizona, JD Vance in Ohio, Rep. Ted Budd in North Carolina, Kelly Tshibaka in Alaska, Tudor Dixon in Michigan and Geoff Diehl in Massachusetts. While the claim by a losing candidate that they won "despite clear evidence he lost", may have started with Donald Trump after his loss in 2020, during primaries leading up to the November 2022 general election, "candidates across the country have refused to concede—even in races that are not remotely close". This trend has been manifested in the violent January 6, 2021 attack on the US Capitol to prevent the certification of Joe Biden as president and the hundreds of elected Republican officials throughout the United States that said that the 2020 presidential election was "rigged", some of whom "are running for statewide offices that would oversee future elections, potentially putting them in position to overturn an election in 2024 or beyond". According to Yascha Mounk, "There is the possibility, for the first time in American history, that a legitimately elected president will not be able to take office". In part the phenomenon is international, democracies are struggling in other parts of the world led by the forces of "digital media, cultural change, and economic stagnation in affluent countries". Leonhardt states that "many experts point out that it is still not clear how the country will escape a larger crisis, such as an overturned election, at some point in the coming decade." In the 2022 elections observers have noted lack of participation in debates between candidates, and in the "retail politicking" that has been a political "cliché ... for generations" in American politics: pressing the flesh at "diners and state fairs ... town-hall-style meetings ... where citizens get to question their elected leaders and those running to replace them". Replacing these are "safer spaces" for candidates, "partisan news outlets, fund-raisers with supporters, friendly local crowds", as the number of competitive House of Representative districts and "swing voters" grows smaller, and candidates concentrate on mobilizing the party loyalists rather than appealing to undecided voters (appeals touching on compromise and bipartisanship angering party hardliners). Observers see a danger in candidates avoiding those tougher interactions, which cut down on the opportunities for candidates' characters and limitations to be revealed, and for elected officials to be held accountable to those who elected them. For the politicians, it creates an artificial environment where their positions appear uniformly popular and opposing views are angrily denounced, making compromise seem risky. Under the campaign and presidency of Donald Trump, observers (such as political scientist Brendan Nyhan) noted some erosion of political norms and ethics, including: The US doesn't recommend its own political system to its allies creating new constitutions. Democratic backsliding concerns have led to some academics to warn that thanks in part to the rulings of the Supreme Court that exacerbated the flaws in American institutions, creating a one-party state that longer meets the minimum requirements to be considered a democracy. With an implementation of term limits and holding elections for Supreme Court justices, the United States could solve the contentious battle for when Supreme Court members unexpectedly die. Packing the Supreme Court proposals would fade away if an election was going to decide the outcome. Thirty-three states already elect their state supreme courts. William Watkins Jr., a constitutional scholar from the Independent Institute on National Public Radio, stated his proposal for 8 to 10-year one-time term limits, he also said justices are supposed to be like umpires calling balls and strikes in the game but are acting more like coaches tinkering with starting lineups, and calling hit and runs. Local district attorneys and county sheriffs are elected and so could Supreme Court justices. The United States Senate used to be appointed by state legislatures before the 17th Amendment was passed in 1913 for them to be elected. A second constitutional convention of the states to amend the Constitution could be a way for this reform to proceed. Term limits for members of Congress was a movement that gained a lot of traction in the early 1990s. 23 State Governments passed legislation that term limited US Congress representatives from each respective state. The Supreme Court decision U.S. Term Limits, Inc. v. Thornton in 1995 invalidated the term limit legislation found in those 23 states. Newt Gingrich's Contract with America promised legislation in the first 100 days for a constitutional amendment for term limits. However, the Term Limits Constitutional Amendment bill did not pass the 2/3 majority to move the bill forward and only passed with a simple majority of 227–204. It would have limited the House and Senate to 12 years total, six terms in the House, and two terms in the Senate. Today, U.S. Term Limits campaigns for 34 states to call for a Convention to propose amendments to the United States Constitution to create a Term Limits amendment. See also Notes The Republican Party in the Trump era remained a mostly pro-business party in its policies but its constituencies and rhetoric have tilted more working class and populist ... much of corporate America has swung culturally into liberalism's camp. ... accelerated by anti-Trump backlash, the more left-leaning commitments of big business's younger customers and (especially) younger employees, ... As a consequence, today's G.O.P. is most clearly now the party of local capitalism—the small-business gentry, the family firms.... Much of the party elite wish to continue doing business with big business as before. But the party's base regards corporate institutions—especially in Silicon Valley, but extending to more traditional capitalist powers—as cultural enemies ... References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Python_(programming_language)#cite_note-28] | [TOKENS: 4314] |
Contents Python (programming language) Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional programming. Guido van Rossum began working on Python in the late 1980s as a successor to the ABC programming language. Python 3.0, released in 2008, was a major revision and not completely backward-compatible with earlier versions. Beginning with Python 3.5, capabilities and keywords for typing were added to the language, allowing optional static typing. As of 2026[update], the Python Software Foundation supports Python 3.10, 3.11, 3.12, 3.13, and 3.14, following the project's annual release cycle and five-year support policy. Python 3.15 is currently in the alpha development phase, and the stable release is expected to come out in October 2026. Earlier versions in the 3.x series have reached end-of-life and no longer receive security updates. Python has gained widespread use in the machine learning community. It is widely taught as an introductory programming language. Since 2003, Python has consistently ranked in the top ten of the most popular programming languages in the TIOBE Programming Community Index, which ranks based on searches in 24 platforms. History Python was conceived in the late 1980s by Guido van Rossum at Centrum Wiskunde & Informatica (CWI) in the Netherlands. It was designed as a successor to the ABC programming language, which was inspired by SETL, capable of exception handling and interfacing with the Amoeba operating system. Python implementation began in December 1989. Van Rossum first released it in 1991 as Python 0.9.0. Van Rossum assumed sole responsibility for the project, as the lead developer, until 12 July 2018, when he announced his "permanent vacation" from responsibilities as Python's "benevolent dictator for life" (BDFL); this title was bestowed on him by the Python community to reflect his long-term commitment as the project's chief decision-maker. (He has since come out of retirement and is self-titled "BDFL-emeritus".) In January 2019, active Python core developers elected a five-member Steering Council to lead the project. The name Python derives from the British comedy series Monty Python's Flying Circus. (See § Naming.) Python 2.0 was released on 16 October 2000, featuring many new features such as list comprehensions, cycle-detecting garbage collection, reference counting, and Unicode support. Python 2.7's end-of-life was initially set for 2015, and then postponed to 2020 out of concern that a large body of existing code could not easily be forward-ported to Python 3. It no longer receives security patches or updates. While Python 2.7 and older versions are officially unsupported, a different unofficial Python implementation, PyPy, continues to support Python 2, i.e., "2.7.18+" (plus 3.11), with the plus signifying (at least some) "backported security updates". Python 3.0 was released on 3 December 2008, and was a major revision and not completely backward-compatible with earlier versions, with some new semantics and changed syntax. Python 2.7.18, released in 2020, was the last release of Python 2. Several releases in the Python 3.x series have added new syntax to the language, and made a few (considered very minor) backward-incompatible changes. As of January 2026[update], Python 3.14.3 is the latest stable release. All older 3.x versions had a security update down to Python 3.9.24 then again with 3.9.25, the final version in 3.9 series. Python 3.10 is, since November 2025, the oldest supported branch. Python 3.15 has an alpha released, and Android has an official downloadable executable available for Python 3.14. Releases receive two years of full support followed by three years of security support. Design philosophy and features Python is a multi-paradigm programming language. Object-oriented programming and structured programming are fully supported, and many of their features support functional programming and aspect-oriented programming – including metaprogramming and metaobjects. Many other paradigms are supported via extensions, including design by contract and logic programming. Python is often referred to as a 'glue language' because it is purposely designed to be able to integrate components written in other languages. Python uses dynamic typing and a combination of reference counting and a cycle-detecting garbage collector for memory management. It uses dynamic name resolution (late binding), which binds method and variable names during program execution. Python's design offers some support for functional programming in the "Lisp tradition". It has filter, map, and reduce functions; list comprehensions, dictionaries, sets, and generator expressions. The standard library has two modules (itertools and functools) that implement functional tools borrowed from Haskell and Standard ML. Python's core philosophy is summarized in the Zen of Python (PEP 20) written by Tim Peters, which includes aphorisms such as these: However, Python has received criticism for violating these principles and adding unnecessary language bloat. Responses to these criticisms note that the Zen of Python is a guideline rather than a rule. The addition of some new features had been controversial: Guido van Rossum resigned as Benevolent Dictator for Life after conflict about adding the assignment expression operator in Python 3.8. Nevertheless, rather than building all functionality into its core, Python was designed to be highly extensible via modules. This compact modularity has made it particularly popular as a means of adding programmable interfaces to existing applications. Van Rossum's vision of a small core language with a large standard library and easily extensible interpreter stemmed from his frustrations with ABC, which represented the opposite approach. Python claims to strive for a simpler, less-cluttered syntax and grammar, while giving developers a choice in their coding methodology. Python lacks do .. while loops, which Rossum considered harmful. In contrast to Perl's motto "there is more than one way to do it", Python advocates an approach where "there should be one – and preferably only one – obvious way to do it". In practice, however, Python provides many ways to achieve a given goal. There are at least three ways to format a string literal, with no certainty as to which one a programmer should use. Alex Martelli is a Fellow at the Python Software Foundation and Python book author; he wrote that "To describe something as 'clever' is not considered a compliment in the Python culture." Python's developers typically prioritize readability over performance. For example, they reject patches to non-critical parts of the CPython reference implementation that would offer increases in speed that do not justify the cost of clarity and readability.[failed verification] Execution speed can be improved by moving speed-critical functions to extension modules written in languages such as C, or by using a just-in-time compiler like PyPy. Also, it is possible to transpile to other languages. However, this approach either fails to achieve the expected speed-up, since Python is a very dynamic language, or only a restricted subset of Python is compiled (with potential minor semantic changes). Python is meant to be a fun language to use. This goal is reflected in the name – a tribute to the British comedy group Monty Python – and in playful approaches to some tutorials and reference materials. For instance, some code examples use the terms "spam" and "eggs" (in reference to a Monty Python sketch), rather than the typical terms "foo" and "bar". A common neologism in the Python community is pythonic, which has a broad range of meanings related to program style: Pythonic code may use Python idioms well; be natural or show fluency in the language; or conform with Python's minimalist philosophy and emphasis on readability. Syntax and semantics Python is meant to be an easily readable language. Its formatting is visually uncluttered and often uses English keywords where other languages use punctuation. Unlike many other languages, it does not use curly brackets to delimit blocks, and semicolons after statements are allowed but rarely used. It has fewer syntactic exceptions and special cases than C or Pascal. Python uses whitespace indentation, rather than curly brackets or keywords, to delimit blocks. An increase in indentation comes after certain statements; a decrease in indentation signifies the end of the current block. Thus, the program's visual structure accurately represents its semantic structure. This feature is sometimes termed the off-side rule. Some other languages use indentation this way; but in most, indentation has no semantic meaning. The recommended indent size is four spaces. Python's statements include the following: The assignment statement (=) binds a name as a reference to a separate, dynamically allocated object. Variables may subsequently be rebound at any time to any object. In Python, a variable name is a generic reference holder without a fixed data type; however, it always refers to some object with a type. This is called dynamic typing—in contrast to statically-typed languages, where each variable may contain only a value of a certain type. Python does not support tail call optimization or first-class continuations; according to Van Rossum, the language never will. However, better support for coroutine-like functionality is provided by extending Python's generators. Before 2.5, generators were lazy iterators; data was passed unidirectionally out of the generator. From Python 2.5 on, it is possible to pass data back into a generator function; and from version 3.3, data can be passed through multiple stack levels. Python's expressions include the following: In Python, a distinction between expressions and statements is rigidly enforced, in contrast to languages such as Common Lisp, Scheme, or Ruby. This distinction leads to duplicating some functionality, for example: A statement cannot be part of an expression; because of this restriction, expressions such as list and dict comprehensions (and lambda expressions) cannot contain statements. As a particular case, an assignment statement such as a = 1 cannot be part of the conditional expression of a conditional statement. Python uses duck typing, and it has typed objects but untyped variable names. Type constraints are not checked at definition time; rather, operations on an object may fail at usage time, indicating that the object is not of an appropriate type. Despite being dynamically typed, Python is strongly typed, forbidding operations that are poorly defined (e.g., adding a number and a string) rather than quietly attempting to interpret them. Python allows programmers to define their own types using classes, most often for object-oriented programming. New instances of classes are constructed by calling the class, for example, SpamClass() or EggsClass()); the classes are instances of the metaclass type (which is an instance of itself), thereby allowing metaprogramming and reflection. Before version 3.0, Python had two kinds of classes, both using the same syntax: old-style and new-style. Current Python versions support the semantics of only the new style. Python supports optional type annotations. These annotations are not enforced by the language, but may be used by external tools such as mypy to catch errors. Python includes a module typing including several type names for type annotations. Also, mypy supports a Python compiler called mypyc, which leverages type annotations for optimization. 1.33333 frozenset() Python includes conventional symbols for arithmetic operators (+, -, *, /), the floor-division operator //, and the modulo operator %. (With the modulo operator, a remainder can be negative, e.g., 4 % -3 == -2.) Also, Python offers the ** symbol for exponentiation, e.g. 5**3 == 125 and 9**0.5 == 3.0. Also, it offers the matrix‑multiplication operator @ . These operators work as in traditional mathematics; with the same precedence rules, the infix operators + and - can also be unary, to represent positive and negative numbers respectively. Division between integers produces floating-point results. The behavior of division has changed significantly over time: In Python terms, the / operator represents true division (or simply division), while the // operator represents floor division. Before version 3.0, the / operator represents classic division. Rounding towards negative infinity, though a different method than in most languages, adds consistency to Python. For instance, this rounding implies that the equation (a + b)//b == a//b + 1 is always true. Also, the rounding implies that the equation b*(a//b) + a%b == a is valid for both positive and negative values of a. As expected, the result of a%b lies in the half-open interval [0, b), where b is a positive integer; however, maintaining the validity of the equation requires that the result must lie in the interval (b, 0] when b is negative. Python provides a round function for rounding a float to the nearest integer. For tie-breaking, Python 3 uses the round to even method: round(1.5) and round(2.5) both produce 2. Python versions before 3 used the round-away-from-zero method: round(0.5) is 1.0, and round(-0.5) is −1.0. Python allows Boolean expressions that contain multiple equality relations to be consistent with general usage in mathematics. For example, the expression a < b < c tests whether a is less than b and b is less than c. C-derived languages interpret this expression differently: in C, the expression would first evaluate a < b, resulting in 0 or 1, and that result would then be compared with c. Python uses arbitrary-precision arithmetic for all integer operations. The Decimal type/class in the decimal module provides decimal floating-point numbers to a pre-defined arbitrary precision with several rounding modes. The Fraction class in the fractions module provides arbitrary precision for rational numbers. Due to Python's extensive mathematics library and the third-party library NumPy, the language is frequently used for scientific scripting in tasks such as numerical data processing and manipulation. Functions are created in Python by using the def keyword. A function is defined similarly to how it is called, by first providing the function name and then the required parameters. Here is an example of a function that prints its inputs: To assign a default value to a function parameter in case no actual value is provided at run time, variable-definition syntax can be used inside the function header. Code examples "Hello, World!" program: Program to calculate the factorial of a non-negative integer: Libraries Python's large standard library is commonly cited as one of its greatest strengths. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. The language includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals, manipulating regular expressions, and unit testing. Some parts of the standard library are covered by specifications—for example, the Web Server Gateway Interface (WSGI) implementation wsgiref follows PEP 333—but most parts are specified by their code, internal documentation, and test suites. However, because most of the standard library is cross-platform Python code, only a few modules must be altered or rewritten for variant implementations. As of 13 March 2025,[update] the Python Package Index (PyPI), the official repository for third-party Python software, contains over 614,339 packages. Development environments Most[which?] Python implementations (including CPython) include a read–eval–print loop (REPL); this permits the environment to function as a command line interpreter, with which users enter statements sequentially and receive results immediately. Also, CPython is bundled with an integrated development environment (IDE) called IDLE, which is oriented toward beginners.[citation needed] Other shells, including IDLE and IPython, add additional capabilities such as improved auto-completion, session-state retention, and syntax highlighting. Standard desktop IDEs include PyCharm, Spyder, and Visual Studio Code; there are web browser-based IDEs, such as the following environments: Implementations CPython is the reference implementation of Python. This implementation is written in C, meeting the C11 standard since version 3.11. Older versions use the C89 standard with several select C99 features, but third-party extensions are not limited to older C versions—e.g., they can be implemented using C11 or C++. CPython compiles Python programs into an intermediate bytecode, which is then executed by a virtual machine. CPython is distributed with a large standard library written in a combination of C and native Python. CPython is available for many platforms, including Windows and most modern Unix-like systems, including macOS (and Apple M1 Macs, since Python 3.9.1, using an experimental installer). Starting with Python 3.9, the Python installer intentionally fails to install on Windows 7 and 8; Windows XP was supported until Python 3.5, with unofficial support for VMS. Platform portability was one of Python's earliest priorities. During development of Python 1 and 2, even OS/2 and Solaris were supported; since that time, support has been dropped for many platforms. All current Python versions (since 3.7) support only operating systems that feature multithreading, by now supporting not nearly as many operating systems (dropping many outdated) than in the past. All alternative implementations have at least slightly different semantics. For example, an alternative may include unordered dictionaries, in contrast to other current Python versions. As another example in the larger Python ecosystem, PyPy does not support the full C Python API. Creating an executable with Python often is done by bundling an entire Python interpreter into the executable, which causes binary sizes to be massive for small programs, yet there exist implementations that are capable of truly compiling Python. Alternative implementations include the following: Stackless Python is a significant fork of CPython that implements microthreads. This implementation uses the call stack differently, thus allowing massively concurrent programs. PyPy also offers a stackless version. Just-in-time Python compilers have been developed, but are now unsupported: There are several compilers/transpilers to high-level object languages; the source language is unrestricted Python, a subset of Python, or a language similar to Python: There are also specialized compilers: Some older projects existed, as well as compilers not designed for use with Python 3.x and related syntax: A performance comparison among various Python implementations, using a non-numerical (combinatorial) workload, was presented at EuroSciPy '13. In addition, Python's performance relative to other programming languages is benchmarked by The Computer Language Benchmarks Game. There are several approaches to optimizing Python performance, despite the inherent slowness of an interpreted language. These approaches include the following strategies or tools: Language Development Python's development is conducted mostly through the Python Enhancement Proposal (PEP) process; this process is the primary mechanism for proposing major new features, collecting community input on issues, and documenting Python design decisions. Python coding style is covered in PEP 8. Outstanding PEPs are reviewed and commented on by the Python community and the steering council. Enhancement of the language corresponds with development of the CPython reference implementation. The mailing list python-dev is the primary forum for the language's development. Specific issues were originally discussed in the Roundup bug tracker hosted by the foundation. In 2022, all issues and discussions were migrated to GitHub. Development originally took place on a self-hosted source-code repository running Mercurial, until Python moved to GitHub in January 2017. CPython's public releases have three types, distinguished by which part of the version number is incremented: Many alpha, beta, and release-candidates are also released as previews and for testing before final releases. Although there is a rough schedule for releases, they are often delayed if the code is not ready yet. Python's development team monitors the state of the code by running a large unit test suite during development. The major academic conference on Python is PyCon. Also, there are special Python mentoring programs, such as PyLadies. Naming Python's name is inspired by the British comedy group Monty Python, whom Python creator Guido van Rossum enjoyed while developing the language. Monty Python references appear frequently in Python code and culture; for example, the metasyntactic variables often used in Python literature are spam and eggs, rather than the traditional foo and bar. Also, the official Python documentation contains various references to Monty Python routines. Python users are sometimes referred to as "Pythonistas". Languages influenced by Python See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Syriac_language] | [TOKENS: 6684] |
Contents Syriac language The Syriac language (/ˈsɪriæk/ SIRR-ee-ak; Classical Syriac: ܠܫܢܐ ܣܘܪܝܝܐ, romanized: Leššānā Suryāyā),[a] also known natively in its spoken form in early Syriac literature as Edessan (Urhāyā), the Mesopotamian language (Nahrāyā) and Aramaic (Aramāyā), is an Eastern Middle Aramaic dialect. Classical Syriac is the academic term used to refer to the dialect's literary usage and standardization, distinguishing it from other Aramaic dialects also known as 'Syriac', 'Assyrian', or 'Syrian'. In its West-Syriac tradition, Classical Syriac is often known as leššōnō kṯoḇonōyō (lit. 'the written language or the book language') or simply kṯoḇonōyō, or kṯowonōyō, while in its East-Syriac tradition, it is known as leššānā ʔatīqā (lit. 'the old language') or saprāyā (lit. 'scribal or literary'). It emerged during the first century AD from a local Eastern Aramaic dialect that was spoken in the ancient Neo-Assyrian kingdom and region of Osroene, centered in the city of Edessa (Urhai). During the Early Christian period, it became the main literary language of various Aramaic-speaking Christian communities in the historical regions of Ancient Syria, Assyria and throughout the Near East. As a liturgical language of Syriac Christianity, it gained a prominent role among Eastern Christian communities that used both Eastern Syriac and Western Syriac rites. Following the spread of Syriac Christianity, it also became a liturgical language of eastern Christian communities as far as India and China. It flourished from the 4th to the 8th century, and continued to have an important role during the next centuries, but by the end of the Middle Ages it was gradually reduced to liturgical use, since the role of vernacular language among its native largely Assyrian and Aramean speakers was overtaken by several Neo-Aramaic languages. Classical Syriac is written in the Syriac alphabet, a derivation of the Aramaic alphabet. The language is preserved in a large body of Syriac literature, which comprises roughly 90% of the extant Aramaic literature. Along with Greek and Latin, Syriac became one of the three most important languages of Early Christianity. Already from the first and second centuries AD, the mostly Assyrian inhabitants of the region of Osroene began to embrace Christianity, and by the third and fourth centuries, local Edessan Aramaic language became the vehicle of the specific Christian culture that came to be known as Syriac Christianity. Because of theological differences, Syriac-speaking Christians diverged during the 5th century into the Assyrian Church of the East that followed the East Syriac Rite under Persian rule, and the Syriac Orthodox Church that followed the West Syriac Rite under the Byzantine rule. As a liturgical language of Syriac Christianity, Classical Syriac spread throughout Asia as far as the Southwestern India (Malabar Coast), and Eastern China, and became the medium of communication and cultural dissemination for the later Arabs, and (to a lesser extent) the other peoples of Parthian and Sasanian empires. Primarily a Christian medium of expression, Syriac had a fundamental cultural and literary influence on the development of Arabic, which largely replaced it during the later medieval period. Syriac remains the sacred language of Syriac Christianity to this day. It is used as the liturgical language of several denominations, like those who follow the East Syriac Rite, including the Assyrian Church of the East and its offshoots, the Ancient Church of the East, and the Chaldean Catholic Church, the Syro-Malabar Catholic Church, and the Assyrian Pentecostal Church, and also those who follow the West Syriac Rite, including: Syriac Orthodox Church, the Syriac Catholic Church, the Maronite Catholic Church, the Malankara Mar Thoma Syrian Church, the Malankara Orthodox Syrian Church and the Syro-Malankara Catholic Church. Classical Syriac was originally the liturgical language of the Syriac Melkites within the Greek Orthodox Patriarchate of Antioch in Antioch and parts of ancient Syria. The Syriac Melkites changed their church's West Syriac Rite to that of Constantinople in the 9th–11th centuries, necessitating new translations of all their Syriac liturgical books. Name Etymologically, the Name of Syria is originally an Iron Age derivation of Assyria and until the Seleucid Empire it referred solely to the historical Assyria which encompassed modern Northern Iraq, Northeast Syria and the area of Southeast Turkey north of these areas. In the English language, the term "Syriac" is used as a linguonym (language name) designating a specific variant of the Aramaic language in relation to its regional origin in northeastern parts of Ancient Syria, around Edessa, which lay outside of the provincial borders of Roman Syria. Since Aramaic was used by various Middle Eastern peoples such as Assyrians, Mandeans, Arameans and Judeans, having several variants (dialects), this specific dialect that originated in northeastern Syria became known under its regional (Syrian/Syriac) designation (Suryaya). In English scholarly literature, the term "Syriac" is preferred over the alternative form "Syrian", since the latter is much more polysemic and commonly relates to Syria in general. That distinction is used in English as a convention and does not exist on the ancient endonymic level. Several compound terms like "Syriac Aramaic", "Syrian Aramaic" or "Syro-Aramaic" are also used, thus emphasizing both the Aramaic nature of the language and its Syrian/Syriac regional origin. Early native speakers and writers used several endonymic terms as designations for their language. In addition to common endonym (native name) for the Aramaic language (Aramaya), another endonymic term was also used, designating more specifically the local Edessan dialect, known as Urhaya, a term derived directly from the native Assyrian name for the city of Edessa (Urhay). Among similar endonymic names with regional connotations, term Nahraya was also used. It was derived from choronym (regional name) Bet-Nahrain, an Aramaic name for Mesopotamia. Original endonymic (native) designations, for Aramaic more broadly (Aramaya), and Edessan Aramaic in particular (Urhaya), were later (starting from the 5th century) accompanied by another term, exonymic (foreign) in origin: Suryaya (Syrian/Syriac), adopted under the influence of a long-standing Greek custom of referring to speakers of Aramaic, be they Assyrian or Aramean as Syrians. Among ancient Greeks, term "Syrian language" was used as a common designation for Aramaic language, and such usage was also reflected in Aramaic, by subsequent (acquired) use of the term "Suryaya" as the most preferred synonym for "Aramaya" (Aramaic). Practice of interchangeable naming (Aramaya, Urhaya, Nahraya, and Suryaya) persisted for centuries, in common use and also in works of various prominent writers. One of those who used various terms was theologian Jacob of Edessa (d. 708), who was referring to the language as "Syrian or Aramaic" (Suryāyā awkēt Ārāmāyā), and also as Urhāyā, when referring to Edessan Aramaic, or Naḥrāyā when pointing to the region of Bet-Nahrain (Aramaic term for Mesopotamia). Plurality of terms among native speakers (ārāmāyā, urhāyā, naḥrāyā, and suryāyā) was not reflected in Greek and Latin terminology, which preferred the Syrian/Syriac designation, and the same preference was adopted by later scholars, with one important distinction: in western scholarly use, Syrian/Syriac label was subsequently reduced from the original Greek designation for the Aramaic language to a more specific (narrower) designation for Edessan Aramaic language, that in its literary and liturgical form came to be known as Classical Syriac. That reduction resulted in the creation of a specific field of Syriac studies, within Aramaic studies. Preference of early scholars towards the use of the Syrian/Syriac label was also relied upon its notable use as an alternative designation for Aramaic language in the "Cave of Treasures", long held to be the 4th century work of an authoritative writer and revered Christian saint Ephrem of Edessa (d. 373), who was thus believed to be proponent of various linguistic notions and tendencies expressed in the mentioned work. Since modern scholarly analyses have shown that the work in question was written much later (c. 600) by an unknown author, several questions had to be reexamined. In regard to the scope and usage of Syrian/Syriac labels in linguistic terminology, some modern scholars have noted that diversity of Aramaic dialects in the wider historical region of Syria should not be overlooked by improper and unspecific use of Syrian/Syriac labels. Diversity of Aramaic dialects was recorded by Theodoret of Cyrus (d. c. 466), who accepted Syrian/Syriac labels as common Greek designations for the Aramaic language, stating that "the Osroënians, the Syrians, the people of the Euphrates, the Palestinians, and the Phoenicians all speak Syriac, but with many differences in pronunciation". Theodoret's regional (provincial) differentiation of Aramaic dialects included an explicit distinction between the "Syrians" (as Aramaic speakers of Syria proper, western of Euphrates), and the "Osroenians" as Aramaic speakers of Osroene (eastern region, centered in Edessa), thus showing that dialect of the "Syrians" (Aramaic speakers of proper Syria) was known to be different from that of the "Osroenians" (speakers of Edessan Aramaic). Native (endonymic) use of the term Aramaic language (Aramaya/Oromoyo) among its speakers has continued throughout the medieval period, as attested by the works of prominent writers, including the Oriental Orthodox Patriarch Michael of Antioch (d. 1199). Since the proper dating of the Cave of Treasures, modern scholars were left with no indications of native Aramaic adoption of Syrian/Syriac labels before the 5th century. In the same time, a growing body of later sources showed that both in Greek, and in native literature, those labels were most commonly used as designations for the Aramaic language, including its various dialects (both eastern and western), thus challenging the conventional scholarly reduction of the term "Syriac language" to a specific designation for Edessan Aramaic. Such use, which excludes non-Edessan dialects, and particularly those of Western Aramaic provenience, persist as an accepted convention, but at the same time stands in contradiction both with original Greek, and later native (acquired) uses of Syrian/Syriac labels as common designations for the Aramaic language. Those problems were addressed by prominent scholars, including Theodor Nöldeke (d. 1930) who noted on several occasions that the term "Syriac language" has come to have two distinctive meanings, wider and narrower, with the first (historical and wider) serving as a common synonym for the Aramaic language as a whole, while other (conventional and narrower) designations only refer to Edessan Aramaic, also referred to more specifically as "Classical Syriac". Noting the problem, scholars have tried to resolve the issue by being more consistent in their use of the term "Classical Syriac" as a strict and clear scientific designation for the old literary and liturgical language, but the consistency of such use was never achieved within the field. Inconsistent use of "Syrian/Syriac" labels in scholarly literature has led some researchers to raise additional questions, related not only to terminological issues but also to some more fundamental (methodological) problems, that were undermining the integrity of the field. Attempts to resolve those issues were unsuccessful, and in many scholarly works, related to the old literary and liturgical language, reduction of the term "Classical Syriac" to "Syriac" (only) remained a manner of convenience, even in titles of works, including encyclopedic entries, thus creating a large body of unspecific references, that became a base for the emergence of several new classes of terminological problems at the advent of the informational era. Those problems culminated during the process of international standardization of the terms "Syriac" and "Classical Syriac" within the ISO 639 and MARC systems. The term "Classical Syriac" was accepted in 2007 and codified (ISO code: syc) as a designation for the old literary and liturgical language, thus confirming the proper use of the term. In the same time, within the MARC standard, code syc was accepted as designation for Classical Syriac, but under the name "Syriac", while the existing general code syr, that was until then named "Syriac", was renamed to "Syriac, Modern". Within ISO 639 system, large body of unspecific references related to various linguistic uses of the term "Syriac" remained related to the original ISO 639-2 code syr (Syriac), but its scope is defined within the ISO 639-3 standard as a macrolanguage that currently includes only some of the Neo-Aramaic languages. Such differences in classification, both terminological and substantial, within systems and between systems (ISO and MARC), led to the creation of several additional problems, that remain unresolved. Within linguistics, mosaic of terminological ambiguities related to Syrian/Syriac labels was additionally enriched by introduction of the term "Palaeo-Syrian language" as a variant designation for the ancient Eblaite language from the third millennium BC, that is unrelated to the much later Edessan Aramaic, and its early phases, that were commonly labeled as Old/Proto- or even Paleo/Palaeo-Syrian/Syriac in scholarly literature. Newest addition to the terminological mosaic occurred c. 2014, when it was proposed, also by a scholar, that one of regional dialects of the Old Aramaic language from the first centuries of the 1st millennium BC should be called "Central Syrian Aramaic", thus introducing another ambiguous term, that can be used, in its generic meaning, to any local variant of Aramaic that occurred in central regions of Syria during any period in history. After more than five centuries of Syriac studies, which were founded by western scholars at the end of the 15th century, main terminological issues related to the name and classification of the language known as Edessan Aramaic, and also referred to by several other names combined of Syrian/Syriac labels, remain opened and unsolved. Some of those issues have special sociolinguistic and ethnolinguistic significance for the remaining Neo-Aramaic speaking communities. Since the occurrence of major political changes in the Near East (2003), those issues have acquired additional complexity, related to legal recognition of the language and its name. In the Constitution of Iraq (Article 4), adopted in 2005, and also in subsequent legislation, term "Syriac" (Arabic: السريانية, romanized: al-suriania) is used as official designation for the language of Neo-Aramaic-speaking communities, thus opening additional questions related to linguistic and cultural identity of those communities. Legal and other practical (educational and informational) aspects of the linguistic self-identification also arose throughout Syriac-speaking diaspora, particularly in European countries (Germany, Sweden, Netherlands). Geographic distribution Syriac was the local dialect of Aramaic in Edessa, and evolved under the influence of the Church of the East and the Syriac Orthodox Church into its current form. Before Arabic became the dominant language, Syriac was a major language among Christian communities in the Middle East, Central Asia and the Malabar Coast in India, and remains so among the Syriac Christians to this day. It has been found as far afield as Hadrian's Wall in Great Britain, with inscriptions written by Aramaic-speaking soldiers of the Roman Empire. History The history of the Syriac language is divided into several successive periods, defined primarily by linguistic, and also by cultural criteria. Some terminological and chronological distinctions exist between different classifications, that were proposed among scholars. During the first three centuries of the Common Era, a local Aramaic dialect spoken in the Kingdom of Osroene, centered in Edessa, to the east of the Euphrates, started to gain prominence and regional significance. There are about eighty extant early inscriptions, written in Old-Edessan Aramaic, dated to the first three centuries AD, with the earliest inscription being dated to the 6th year AD, and the earliest parchment to 243 AD. All of these early examples of the language are non-Christian. As a language of public life and administration in the region of Osroene, Edessan Aramaic was gradually given a relatively coherent form, style and grammar that is lacking in other Aramaic dialects of the same period. Since Old-Edessan Aramaic later developed into Classical Syriac, it was retroactively labeled by western scholars as "Old Syrian/Syriac" or "Proto-Syrian/Syriac", although the linguistic homeland of the language in the region of Osroene, was never part of contemporary (Roman) Syria. In the 3rd century, churches in Edessa began to use local Aramaic dialect as the language of worship. Early literary efforts were focused on creation of an authoritative Aramaic translation of the Bible, the Peshitta (ܦܫܝܛܬܐ Pšīṭtā). At the same time, Ephrem the Syrian was producing the most treasured collection of poetry and theology in the Edessan Aramaic language, that later became known as Syriac. In 489, many Syriac-speaking Christians living in the eastern reaches of the Roman Empire fled to the Sasanian Empire to escape persecution and growing animosity with Greek-speaking Christians.[citation needed] The Christological differences with the Church of the East led to the bitter Nestorian Schism in the Syriac-speaking world. As a result, Syriac developed distinctive western and eastern varieties. Although remaining a single language with a high level of comprehension between the varieties, the two employ distinctive variations in pronunciation and writing system, and, to a lesser degree, in vocabulary. The Syriac language later split into a western variety, used mainly by the Syriac Orthodox Church in upper Mesopotamia and Syria proper, and an eastern variety used mainly by the Church of the East in central and northeastern Mesopotamia. Religious divisions were also reflected in linguistic differences between the Western Syriac Rite and the Eastern Syriac Rite. During the 5th and the 6th century, Syriac reached its height as the lingua franca of Mesopotamia and surrounding regions. It existed in literary (liturgical) form, as well as in vernacular forms, as the native language of Syriac-speaking populations. Following the Arab conquest in the 7th century, vernacular forms of Syriac were gradually replaced during the next centuries by the advancing Arabic language. Having an Aramaic (Syriac) substratum, the regional Arabic dialect (Mesopotamian Arabic) developed under the strong influence of local Aramaic (Syriac) dialects, sharing significant similarities in language structure, as well as having evident and stark influences from previous (ancient) languages of the region. Syriac-influenced Arabic dialects developed among Iraqi Muslims, as well as Iraqi Christians, most of whom descend from native Syriac speakers. Western Syriac is the official language of the West Syriac Rite, practiced by the Syriac Orthodox Church, the Syriac Catholic Church, the Maronite Catholic Church, the Malankara Orthodox Syrian Church, the Malabar Independent Syrian Church, the Malankara Mar Thoma Syrian Church, the Syro-Malankara Catholic Church and some Parishes in the Syro-Malabar Knanaya Archeparchy of Kottayam. Eastern Syriac is the liturgical language of the East Syriac Rite, practised in modern times by the ethnic Assyrian followers of the Assyrian Church of the East, the Assyrian Pentecostal Church, the Ancient Church of the East, the Chaldean Catholic Church, as well as the Syro-Malabar Catholic Church in India. Syriac literature is by far the most prodigious of the various Aramaic languages. Its corpus covers poetry, prose, theology, liturgy, hymnody, history, philosophy, science, medicine and natural history. Much of this wealth remains unavailable in critical editions or modern translation. From the 7th century onwards, Syriac gradually gave way to Arabic as the spoken language of much of the region, excepting northern Iraq and Mount Lebanon. The Mongol invasions and conquests of the 13th century, and the religiously motivated massacres of Syriac Christians by Timur further contributed to the rapid decline of the language. In many places outside of Upper Mesopotamia and Mount Lebanon, even in liturgy, it was replaced by Arabic. Revivals of literary Syriac in recent times have led to some success with the creation of newspapers in written Syriac (ܟܬܒܢܝܐ Kṯāḇānāyā), similar to the use of Modern Standard Arabic has been employed since the early decades of the 20th century.[clarification needed] Modern forms of literary Syriac have also been used not only in religious literature but also in secular genres, often with Assyrian nationalistic themes. Syriac is spoken as the liturgical language of the Syriac Orthodox Church, as well as by some of its adherents. Syriac has been recognised as an official minority language in Iraq. It is also taught in some public schools in Iraq, Syria, Palestine, Israel, Sweden, Augsburg (Germany) and Kerala (India). In 2014, an Assyrian nursery school could finally be opened in Yeşilköy, Istanbul, after waging a lawsuit against the Ministry of National Education which had denied it permission, but was required to respect non-Muslim minority rights as specified in the Treaty of Lausanne. In August 2016, the Ourhi Centre was founded by the Assyrian community in the city of Qamishli, to educate teachers in order to make Syriac an additional language to be taught in public schools in the Jazira Region of the Autonomous Administration of North and East Syria, which then started with the 2016/17 academic year. In April 2023, a team of AI researchers completed the first AI translation model and website for classical Syriac. Grammar Many Syriac words, like those in other Semitic languages, belong to triconsonantal roots, collations of three Syriac consonants. New words are built from these three consonants with variable vowel and consonant sets. For example, the following words belong to the root ܫܩܠ (ŠQL), to which a basic meaning of taking can be assigned: Most Syriac nouns are built from triliteral roots. Nouns carry grammatical gender (masculine or feminine), they can be either singular or plural in number (a very few can be dual) and can exist in one of three grammatical states. These states should not be confused with grammatical cases in other languages. However, very quickly in the development of Classical Syriac, the emphatic state became the ordinary form of the noun, and the absolute and construct states were relegated to certain stock phrases (for example, ܒܪ ܐܢܫܐ/ܒܪܢܫܐ, bar nāšā, "man, person", literally "son of man"). In Old and early Classical Syriac, most genitive noun relationships are built using the construct state, but contrary to the genitive case, it is the head-noun which is marked by the construct state. Thus, ܫܩ̈ܠܝ ܡܠܟܘܬܐ, šeqlay malkuṯā, means "the taxes of the kingdom". Quickly, the construct relationship was abandoned and replaced by the use of the relative particle ܕ, d-, da-. Thus, the same noun phrase becomes ܫܩ̈ܠܐ ܕܡܠܟܘܬܐ, šeqlē d-malkuṯā, where both nouns are in the emphatic state. Very closely related nouns can be drawn into a closer grammatical relationship by the addition of a pronominal suffix. Thus, the phrase can be written as ܫܩ̈ܠܝܗ ܕܡܠܟܘܬܐ, šeqlêh d-malkuṯā. In this case, both nouns continue to be in the emphatic state, but the first has the suffix that makes it literally read "her taxes" ("kingdom" is feminine), and thus is "her taxes, [those] of the kingdom". Adjectives always agree in gender and number with the nouns they modify. Adjectives are in the absolute state if they are predicative, but agree with the state of their noun if attributive. Thus, ܒܝܫܝ̈ܢ ܫܩ̈ܠܐ, bišin šeqlē, means "the taxes are evil", whereas ܫܩ̈ܠܐ ܒܝ̈ܫܐ, šeqlē ḇišē, means "evil taxes". Most Syriac verbs are built on triliteral roots as well. Finite verbs carry person, gender (except in the first person) and number, as well as tense and conjugation. The non-finite verb forms are the infinitive and the active and passive participles. Syriac has only two true morphological tenses: perfect and imperfect. Whereas these tenses were originally aspectual in Aramaic, they have become a truly temporal past and future tenses respectively. The present tense is usually marked with the participle followed by the subject pronoun. Such pronouns are usually omitted in the case of the third person. This use of the participle to mark the present tense is the most common of a number of compound tenses that can be used to express varying senses of tense and aspect. Syriac also employs derived verb stems such as are present in other Semitic languages. These are regular modifications of the verb's root to express other changes in meaning. The first stem is the ground state, or Pəʿal (this name models the shape of the root) form of the verb, which carries the usual meaning of the word. The next is the intensive stem, or Paʿʿel, form of the verb, which usually carries an intensified meaning. The third is the extensive stem, or ʾAp̄ʿel, form of the verb, which is often causative in meaning. Each of these stems has its parallel passive conjugation: the ʾEṯpəʿel, ʾEṯpaʿʿal and ʾEttap̄ʿal respectively. To these six cardinal stems are added a few irregular stems, like the Šap̄ʿel and ʾEštap̄ʿal, which generally have an extensive meaning. The basic G-stem or "Peal" conjugation of "to write" in the perfect and imperfect is as follows: Phonology Phonologically, like the other Northwest Semitic languages, Syriac has 22 consonants. The consonantal phonemes are: Phonetically, there is some variation in the pronunciation of Syriac in its various forms. The various Modern Eastern Aramaic vernaculars have quite different pronunciations, and these sometimes influence how the classical language is pronounced, for example, in public prayer. Classical Syriac has two major streams of pronunciation: western and eastern. Syriac shares with Aramaic a set of lightly contrasted stop/fricative pairs. In different variations of a certain lexical root, a root consonant might exist in stop form in one variation and fricative form in another. In the Syriac alphabet, a single letter is used for each pair. Sometimes a dot is placed above the letter (quššāyā "strengthening"; equivalent to a dagesh in Hebrew) to mark that the stop pronunciation is required, and a dot is placed below the letter (rukkāḵā "softening") to mark that the fricative pronunciation is required. The pairs are: Like some Semitic languages, Syriac too has emphatic consonants, and it has three of them, /q/ being a historically emphatic variant of /k/. These are consonants that have a coarticulation in the pharynx or slightly higher. There are two pharyngeal fricatives, another class of consonants typically found in Semitic languages. Syriac also has a rich array of sibilants: As with most Semitic languages, the vowels of Syriac are mostly subordinated to consonants. Especially in the presence of an emphatic consonant, vowels tend to become mid-centralised. Classical Syriac had the following distinguishable vowels: In the western dialect, /ɑ/ has become [ɔ], and the original /o/ has merged with /u/. In eastern dialects, there is more fluidity in the pronunciation of front vowels, with some speakers distinguishing five qualities of such vowels, and others only distinguishing three. Vowel length is generally not important: close vowels tend to be longer than open vowels. The open vowels form diphthongs with the approximants /j/ and /w/. In almost all dialects, the full sets of possible diphthongs collapses into two or three actual pronunciations: See also Notes References Sources External links |
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Contents PlayStation 2 The PlayStation 2 (PS2) is a home video game console developed and marketed by Sony Computer Entertainment. It was first released in Japan on 4 March 2000, in North America on October 26, in Europe on November 24, in Australia on November 30, and other regions thereafter. It is the successor to the original PlayStation as well as the second installment in the PlayStation brand of consoles. As a sixth-generation console, it competed with Nintendo's GameCube, Sega's Dreamcast, and Microsoft's Xbox. Announced in 1999, Sony began developing the console after the immense success of its predecessor. In addition to serving as a game console, it features a built-in DVD drive and was priced lower than standalone DVD players of the time, enhancing its value. Full backward compatibility with original PlayStation games and accessories gave it access to a vast launch library, far surpassing those of its competitors. The console's hardware was also notable for its custom-built Emotion Engine processor, co-developed with Toshiba, which was promoted as being more powerful than most personal computers of the era. The PlayStation 2 remains the best-selling video game console of all time, having sold 160 million units worldwide—nearly triple the combined sales of competing sixth-generation consoles. It received widespread critical acclaim and amassed a global library of 10,987 game titles,[citation needed] with 1.54 billion copies sold. In 2004, Sony revised the console with a smaller, lighter body officially known as the "Slimline". Even after the release of its successor, the PlayStation 3, in 2006, it remained in production and continued to receive new game releases for several years with the last game for the system Pro Evolution Soccer 2014 being released in Europe in November 2013. Manufacturing officially ended in early 2013, giving the console one of the longest lifespans in video game history. History [[PlayStation ( )|Plopment kits]], large-scale advertising campaigns, and strong third-party developer support. By the late 1990s Sony had dethroned established rivals Sega and Nintendo in the global video game market. Sega, spurred on by their declining market share and significant financial losses, launched the Dreamcast in 1998 as a last-ditch attempt to stay in the industry. Fuelled by a large marketing campaign, it sold over 500,000 units within two weeks. Though Sony has kept details of the PlayStation 2's development secret, Ken Kutaragi, "the Father of the PlayStation", reportedly began working on a second console around the time of the original PlayStation's launch in late 1994. At some point during development, employees from Argonaut Games, under contract for semiconductor manufacturer LSI Logic Corporation, were instructed to design a rendering chip for Sony's upcoming console. Jez San, founder of Argonaut, recalled that his team had no direct contact with Sony during the development process. Unbeknownst to him, Sony was designing their own chip in-house and had instructed other companies to design rendering chips merely to diversify their options. By early 1997, the press was reporting that a new PlayStation was being developed and would have backward-compatibility with the original PlayStation, a built-in DVD player, and Internet connectivity. However, Sony continued to officially deny that a successor was being developed. Chris Deering, then-president of Sony Computer Entertainment Europe (SCEE) recalled that there was a degree of trepidation among Sony leaders to produce a console which would recapture or exceed the success of its predecessor. As such, Sony aimed for a consecutive market success, noting that neither Nintendo nor Sega had achieved back-to-back console victories. Deering compared the goal to winning "two gold medals in two back-to-back Olympics". Sony officially revealed the first details of the PlayStation 2 on 2 March 1999, confirming in a press release that its processor would ensure full backwards compatibility with original PlayStation software, significantly boosted performance, four-fold increase in data transfer rates, and a 20-times faster serial interface. Kutaragi affirmed that the new console would allow video games to convey "unprecedented emotions". Indeed, Sony estimated the PlayStation 2 could render 7.5 million to 16 million polygons per second, whereas contemporary independent estimates ranged from 3 million to 20 million, compared to Sega's estimates of more than 3 million to 6 million for the rival Dreamcast. Later in the year, Nintendo announced their next console, the GameCube, and Microsoft began development of their own console, the Xbox. Rumours soon emerged suggesting that, despite its technical capabilities, the PlayStation 2 was notably difficult to develop for. Capcom designer Shinji Mikami, known for creating the Resident Evil and Dino Crisis franchises, criticised the lack of adequate development tools provided by Sony. Having worked on titles for multiple fifth-generation platforms, Mikami described the PlayStation 2 as the most challenging system he had encountered. Likewise, Konami's Hideo Kojima expressed disappointment with the console's power, feeling it had not met his expectations. "PlayStation 2's real-time graphics have no limitations. That's why I chose the colour black as it represents the infinity of the universe. The blue represents the intelligence and life spouting up." The PlayStation 2 was officially unveiled at the Tokyo Game Show on 20 September 1999, in the presence of around 1,500 journalists. Although no physical console was shown and the name had yet to be finalised, Sony presented a series of visually striking—if somewhat overstated—technical demonstrations that generated considerable media attention. A press release issued the same day described the hardware as featuring "the world’s fastest graphics rendering processor", capable of producing "movie-quality 3D graphics in real time". One of the event's most symbolic moments came when Sony president Norio Ohga expressed pride in formally associating the Sony name with the PlayStation brand—a notable reversal from the company's cautious stance during the development of the original console, when concerns about entering the video game industry had led executives to distance the corporate brand from the project. By this point, the PlayStation had sold over 50 million units worldwide and become one of Sony's most profitable divisions, accounting for roughly a quarter of their operating income. Shortly after its unveiling, Sony announced a major restructuring that included workforce reductions and a shift in focus towards PlayStation as a core part of the company's future. Kutaragi, once considered a maverick for championing the original PlayStation, remarked: "We’re just going to be forced to educate the Sony Corporation a bit". On 1 April 1999, Sony and Toshiba established a joint venture in Nagasaki Prefecture to manufacture the PlayStation 2's central processor, known as the Emotion Engine. Sony Computer Entertainment (SCE) held a 49 per cent stake in the new company, which was formed to ensure a steady supply of the chip and avoid production issues similar to those faced by rivals such as Sega and NEC. The Emotion Engine was central to Kutaragi's vision for the console. Designed specifically for gaming, it featured strong floating-point performance and could deliver 6.2 gigaflops at 300 MHz—twice the speed of the leading PC processors at the time. Kutaragi envisioned the chip as enabling more lifelike and emotionally resonant gameplay. According to then-Worldwide Studios head Phil Harrison, the processor's architecture was initially met with scepticism when presented at a chip design conference, with some experts doubting it could be manufactured at scale. Sony ultimately invested over $1 billion in production during the console's first two years. The ultimate success of the Emotion Engine helped elevate SCE's profile from a game developer to a serious player in semiconductor design. Incorporating a DVD player in the console proved to be a pivotal decision. While Sony presented it primarily as a gaming device, the DVD functionality would prove influential in expanding its appeal. Ray Maguire, then-managing director of SCE UK, later said that although the DVD feature was acknowledged in marketing, the focus remained on games. In contrast, Deering noted that in regions such as Southern Europe, where gaming was less prevalent, the DVD capability was to be promoted more heavily. This strategy proved successful in increasing console penetration in markets like Spain, where the PS2 significantly expanded the installed base of video game hardware. The decision to include DVD-Video support was the result of Kutaragi witnessing a demonstration for the Nuon, an enhancement chip developed by VM Labs that added video game support to commercial DVD players. The original PlayStation's success had elevated Kutaragi's stature within Sony to the extent that he could overrule the company's concerns over cannibalizing sales of their standalone DVD players. Sony launched the PlayStation 2 in Japan on 4 March 2000, at a price of ¥39,800. Reported scenes of "hysteria" contrasted with the relatively subdued launch of the original PlayStation in 1994. More than 10,000 people queued across Tokyo on its launch day, some of whom had started waiting four days earlier. Demand was exceptionally high, with all one million launch units selling out over the course of the first weekend. A black market had quickly opened up in Akihabara, with most consoles on eBay selling in excess of $2000 each. One Japanese man committed suicide after failing to purchase one. Within five days, a million PlayStation 2 had been sold. Despite very strong hardware sales, the Japanese launch was not without issues. Software sales were initially low, with reports suggesting that many consumers purchased the console primarily for its DVD playback capabilities. Additionally, early complaints about faulty memory cards contributed to a dip in Sony's stock price on the Tokyo Stock Exchange in the days following the release. We were awfully unprepared [...] because of the fast transition between PS1 and PS2, we had no idea how the industry manages these things. Former Worldwide Studios president Shuhei Yoshida acknowledged that Sony had been "awfully unprepared" for the transition from the original PlayStation, noting the company's limited experience in managing generational console launches. Due to a lack of launch software, much of the early consumer interest centred on the console's ability to play DVDs. According to Yoshida, in Japan, the best-selling title during the launch period was not a game, but a DVD of The Matrix (1999). He remarked that while standalone DVD players were still expensive at the time, the PlayStation 2 offered comparable functionality at a significantly lower price point, contributing to its immediate commercial success. The PlayStation 2 launched with eleven "underwhelming" titles, including Ridge Racer V, Tekken Tag Tournament, and Street Fighter EX3. By 31 March 2000, the PlayStation 2 had sold its entire inventory of 1.4 million units in Japan. The United States launch on 26 October 2000 received a mixed reception. Sony reduced their initial shipment from one million units to approximately 500,000 due to supply constraints and manufacturing issues with a new, smaller version of the Graphics Synthesizer chip, leading to widespread shortages. This sparked rumours of intentional stock manipulation to drive hype, especially as small supplies remained available in Japan. Retailers, who had taken pre-orders based on the higher estimates, were forced to cancel many reservations. Despite the frustration, the scarcity created a media frenzy, with widespread coverage of long queues and eager buyers camping outside stores. Technology journalist, analyst and blogger Michael Gartenberg remarked that "you could not get a PlayStation 2 in the US in that first holiday season", and felt that its demand could have harmed Sony's image when consumers were looking to purchase, but ultimately could not. However, the launch was supported by a broader selection of games compared to Japan. Electronic Arts (EA) sold 40,000 copies of Madden NFL 2001 prior to the console's release, and Rockstar Games saw early success with Midnight Club: Street Racing (2000) and Smuggler's Run (2000). Despite some criticism of the launch itself, Rockstar's Sam Houser remarked that it marked the "beginning of a new era" for the video game industry. American sales of the console generated $250 million on the first day, beating the $97 million made on the first day of the Dreamcast. Sony's strategy of shipping approximately 100,000 PlayStation 2 units per week to the American market did little to ease consumer frustration. While the console was readily available in Japan, it remained largely sold out in the United States until March 2001 due to manufacturing delays. The PlayStation 2 had a yet more troubled launch in the United Kingdom and rest of Europe on 24 November 2000. The BBC's consumer investigative journalism programme Watchdog criticised the console's £299 price as part of a "Rip-off Britain" segment. Additionally, some media outlets speculated that Sony had deliberately limited supply to create artificial demand. This perception was intensified by the decision to allocate only 80,000 preorders to the European market, despite Sony having previously identified Europe as its largest PlayStation territory, with 28 million original PlayStation units sold—compared to 27 million in North America and 17 million in Japan. Particularly serious were complaints about faults with the new consoles, many of which purportedly failed to work on Christmas Day. The European launch of the PlayStation 2 was marked by stock shortages, which led to an unusual scene on release night as journalists searched unsuccessfully for the kind of large-scale consumer queues seen in Japan and the United States. Early resale attempts online saw ambitious asking prices of up to £1,500, though most units ultimately sold for closer to £500. Post-launch criticism emerged online, with some gaming outlets focusing on the console's lack of anti-aliasing and developers voicing frustration over the system's programming complexity. At the time, Phil Harrison dismissed the backlash as indicative of the "worldwide cultural significance" of the console's arrival. Despite its problematic launch, the PlayStation 2 was an immediate financial and competitive triumph. Its success at the end of 2000 compounded Sega's serious financial issues; having sold 6.5 million Dreamcast consoles over a period of 22 months, Sony managed to ship 10 million PlayStation 2 units in under 15 months, with sales continuing to accelerate. As the PlayStation 2 increasingly dominated the market, and with Nintendo and Microsoft preparing to enter with new consoles, Sega chairman Isao Okawa made the decision to exit the hardware business. The Dreamcast was discontinued on 31 March 2001. On the same day, Sony announced that over 10.6 million units had been sold worldwide. Sony soon faced a new challenge from Microsoft's entry into the gaming sector with their release of the Xbox in November 2001. Internally, Sony executives recognised the scale of the threat, aware that Microsoft held significantly greater financial resources. Whilst the Japanese team were less alarmed, SCEE's Chris Deering anticipated intense competition and took a cautious approach. However, Microsoft's US-centric strategy resulted in the Xbox struggling to gain traction outside North America, despite hiring talented staff. Sony's emphasis on building strong relationships with third-party publishers, and attractive incentives such as reduced platform fees, marketing support, and access to advanced development kits, secured key exclusives that helped maintain their market lead. This initiative was heavily emphasised by Ken Kutaragi, who advocated for a diverse ecosystem of software support. He advised that Sony should not dominate more than a third of its own software market to avoid alienating third-party developers. By 2001, Sony had established a commanding lead in the gaming market, bolstered by the break-out success of Rockstar's Grand Theft Auto III and Konami's Metal Gear Solid 2: Sons of Liberty. The former game's open world design captured the attention of a broad audience and marked a turning point in the PlayStation 2's momentum. The console's growing library reflected the same wide-ranging appeal that had defined the original PlayStation, offering something for "every type" of consumer. Sony also positioned itself at the forefront of innovation. Early trade show demonstrations showcased the PlayStation 2's USB capabilities, with developers experimenting with motion controls long before they became industry standard. This experimentation would eventually lead to the release of the EyeToy, a camera-based peripheral that introduced a new form of interactive play and inspired a wave of titles aimed at broader, non-traditional audience. Many analysts initially predicted a close three-way matchup among the PlayStation 2, Xbox and GameCube. While the Xbox boasted the most powerful hardware, and the GameCube least expensive of the three, the PlayStation 2 continued to rapidly outsell both platforms. By October 2002, it had sold 40 million units worldwide. Market research firm In-Stat projected that Sony would sell 120 million consoles by 2006, reaffirming the platform's commercial dominance. The report highlighted the expanding scale of the video game industry, characterising it as an increasingly significant segment of the consumer electronics market. Sony cut the price of the console in 2002 from $299 to $199 in North America, undercutting both the Xbox and GameCube. Further price drops in Japan followed in the following year. In early 2004, Sony Computer Entertainment America (SCEA) reported over 25 million PlayStation 2 units had sold in North America. Of these, approximately 2.6 million were equipped for online play, with one million users actively engaging in online gaming services. While hardware sales were expected to decline as the PlayStation 2 entered its post-peak sales period, software sales remained strong. Analysts projected continued growth in the platform's game library and online engagement, particularly as new online-compatible titles were released and existing users looked to extend the utility of their consoles. In September 2004, Sony revealed a newer, slimmer model of the PlayStation 2 dubbed the "Slimline" for US$149 (equivalent to $250 in 2025). An apparent manufacturing issue and underestimated demand caused initial slowdown in producing the new unit caused in part by shortages between the time Sony cleared out the old units and the new units were ready. The issue was compounded in the United Kingdom when a Russian oil tanker became stuck in the Suez Canal, blocking a ship from China carrying PlayStation 2s bound for the Port of Felixstowe. During one week in November 2004, British sales totalled 6,000 units—compared to 70,000 units a few weeks prior. Sony remedied the issue by hiring Russian Antonov An-24 cargo planes to airlift units twice a week. There were shortages in more than 1,700 shops in North America on the day before Christmas. It became the fastest game console to sell 100 million units by 2008, accomplishing the feat within 5 years and 9 months from its launch; though this was surpassed 4 years later when the Nintendo DS reached 100 million shipments in 4 years and 5 months from its launch. The PlayStation 2 remained the best-selling and most played console by 2008, even surpassing the PlayStation 3. By July 2009, the system had sold 138.8 million units worldwide, with 51 million of those units sold in PAL regions. Later that year, Sony announced that it had discontinued all console colours, however sales remained consistently strong. In 2010, Sony introduced a Bravia television with a built-in PlayStation 2. Sales dropped significantly to 600,000 units by the beginning of 2012, partly due to the global launch of the PlayStation Vita a few months prior. By 31 March 2012, twelve years after its launch, over 155 million units were sold worldwide. Sony officially stopped supplying updated sales numbers of the system in the same year. Production was officially discontinued on 4 January 2013 after almost thirteen years of production—one of the longest lifespans of any video game console. Sales in the fourth quarter of 2012 reached an "astonishing" 1.6 million units, totalling to 5 million units sold that year, surpassing the previous year's sales of 4.1 million units. New games continued to be made until the end of 2013, including Final Fantasy XI for Japan, and FIFA 14: Legacy Edition for North America and South America. The last game ever released for the system was Pro Evolution Soccer 2014 for the United Kingdom on 8 November 2013. Repair services for the system in Japan ended on 7 September 2018 due to a shortage of parts. In February 2024, Jim Ryan (CEO of Sony Interactive Entertainment) confirmed on the Official PlayStation Podcast that the PlayStation 2 had sold 160 million units worldwide. This statement was not directly corroborated by Sony themselves until eight months later, when this figure officially appeared on the PlayStation 30th Anniversary website in November that year. Hardware The main central processing unit (CPU) is the 64-bit R5900-based "Emotion Engine", custom-designed by Sony and Toshiba.[c] The Emotion Engine consists of eight separate "units", each performing a specific task, integrated onto the same die. These units include a central CPU core, two Vector Processing Units (VPU), a 10-channel DMA unit, a memory controller, and an Image Processing Unit (IPU). There are three interfaces: an input output interface to the I/O processor running at a clock speed of 36.864 MHz, a graphics interface to the graphics synthesiser, and a memory interface to the system memory. The Emotion Engine CPU has a clock rate of 294.912 MHz (299 MHz on newer versions) and 6,000 MIPS, with a floating point performance of 6.2 GFLOPS. The system's I/O processor was based on the PlayStation's CPU and was designed to provide full backward compatibility with the PlayStation. The system has 32 MB of RDRAM. The GPU is likewise custom-designed for the console, named the "Graphics Synthesizer". It has a fillrate of 2.4 gigapixels per second, capable of rendering up to 75 million polygons per second. The GPU also runs with a clock frequency of 147.456 MHz (which is half the clock speed of the Emotion Engine), 4 MB of DRAM is capable of transmitting a display output of 1280 x 1024 pixels on both PAL and NTSC televisions. The PlayStation 2 has a maximum colour depth of 16.7 million true colours. When accounting for features such as lighting, texture mapping, artificial intelligence, and game physics, the console has a real-world performance of 25 million polygons per second. The PlayStation 2 also features two USB ports, and one IEEE 1394 (Firewire) port for SCPH-10000 to 3900x models only. A hard disk drive can be installed in an expansion bay on the back of the console, and is required to play certain games, notably the popular Final Fantasy XI. The system has 4 MB of Video RAM in the form of eDRAM. Software was distributed primarily on DVD-ROMs, with earlier titles being published on blue-tinted CD-ROM format. In addition, the console can play audio CDs and DVD films and is backward-compatible with almost all original PlayStation games. The PlayStation 2 also supports PlayStation memory cards and controllers, although original PlayStation memory cards will only work with original PlayStation games and the controllers may not support all functions (such as analogue buttons) for PlayStation 2 games. The standard PlayStation 2 memory card has an 8 megabyte (MB) capacity and features MagicGate encryption. The PlayStation 2 can natively output video resolutions on SDTV and HDTV from 480i to 480p, and some games, such as Gran Turismo 4 (2004) and Tourist Trophy (2006), are known to support up-scaled 1080i resolution. The PlayStation 2 supports the following standards: composite video(480i), S-Video (480i), RGB (480i/p), VGA (for progressive scan games and PS2 Linux only), YPBPR component video (240p, 480i/p, 1080i), and D-Terminal. Cables are available for all of these signal types; these cables also output analogue stereo audio. Additionally, an RF modulator is available for the system to connect to older TVs. The PlayStation 2 underwent many revisions during its lifespan. It is primarily differentiated between models featuring the original "fat" case design and "slimline" models, which were introduced at the end of 2004. In 2010, the Sony Bravia KDL-22PX300 was made available to consumers. It was a 22" HD-Ready television which incorporated a built-in PlayStation 2. The standard colour of the PS2 is matte black. Several variations in colour were produced in different quantities and regions, including ceramic white, light yellow, aqua, metallic silver, navy blue, opaque blue, midnight black, pearl white, sakura purple, satin gold, satin silver, snow white, super red, ocean blue, and pink, which was distributed in some regions such as Oceania, and parts of Asia. In October 2004, Sony released the "Slimline", a smaller, redesigned version of the original PlayStation 2. It includes a built-in Ethernet port and an external power supply. Due to its thinner profile, it does not contain the 3.5" expansion bay and therefore does not support the internal hard disk drive. The removal of the expansion bay was criticised as a limitation to software, due to the existence of titles such as Final Fantasy XI, which required the HDD use. The slimline model features a top-loading disc mechanism, replacing the motorised tray-loading system of the original version. Like its predecessor, the slimline console is designed to operate in both horizontal and vertical orientations; however, vertical placement requires a dedicated stand for stability. Sony also manufactured a consumer electronic device, the PSX, which was marketed as an all-in-one home media centre. Integrating nanotechnology, the system combines the PlayStation 2's Graphics Synthesizer and Emotion Engine processors into a single chipset, known as the 90 nm EE+GS. In addition to its gaming capabilities, the PSX features an integrated analogue television tuner, as well as the ability to record both television programmes and DVDs. The device also supports broadband internet connectivity and features a memory card slot, enabling users to view digital photographs and play MP3 audio files directly on a connected television. It was released exclusively in Japan on 13 December 2003 in two models: the DESR-5000, featuring a 160 GB hard drive, priced at ¥79,800, and the DESR-7000, with a 250 GB hard drive, priced at ¥99,800. The PlayStation 2 introduced optional online functionality via a dedicated network adaptor, which enabled both Ethernet and dial-up Internet connections. The hardware component of the adaptor was compact—smaller than a standard paperback book—and installed easily into the expansion bay at the rear of the console. Once secured with two screws and connected to a telephone line or Ethernet cable, the adaptor was ready for use. Sony did not operate their own subscription-based online service for the PlayStation 2, instead allowing users to connect through existing Internet service providers. However, some providers, such as AOL, imposed additional charges for console connectivity—typically around $4.95 per month. A key distinction in Sony's approach was their support for both broadband and dial-up connections, in contrast to Microsoft's broadband-only requirement for the Xbox. While broadband provided a significantly smoother experience, Sony's decision ensured greater accessibility for users with limited internet infrastructure. For households with established home networks, connecting the PlayStation 2 via Ethernet to a router was straightforward and efficient. Sony also delegated the responsibility for online functionality to individual game developers and publishers. Each third-party developer was required to manage their own servers and infrastructure for their respective titles. This decentralised model meant that users often needed to create separate login credentials for each game, and the quality of online services varied depending on the developer's expertise and resources. The PlayStation 2's DualShock 2 controller retains most of the same functionality as its predecessor, with several key enhancements. The most significant functional upgrade is the inclusion of pressure-sensitive inputs across all primary controls. Unlike the original DualShock controller, which featured only digital input for the directional pad and face buttons, the DualShock 2 allowed for 255 levels of pressure sensitivity on the directional pad; four face buttons, and four shoulder buttons. Aesthetically, the DualShock 2 is distinguished by its black colour scheme and minor adjustments in weight and internal components. It is marginally lighter than the original, due in part to a reduction in the mechanical complexity of the vibration motors. The DualShock 2 maintained the overall layout and ergonomics of the original controller. Like its predecessor, the DualShock 2 controller has force feedback, or "vibration" functionality. Specialised controllers include light guns (GunCon), fishing rod and reel controllers, a Dragon Quest VIII "slime" controller, a Final Fantasy X-2 "Tiny Bee" dual pistol controller, an Onimusha 3 katana controller, and a Resident Evil 4 chainsaw controller. Much like the original PlayStation, Sony released a series of peripherals to add extra layers of functionality. Such peripherals include memory cards, a DVD remote control, an internal or external hard disk drive (HDD), network adapter, horizontal and vertical stands, the Multiplayer Adapter (a four-player multitap), a USB motion camera (EyeToy), keyboard and mouse, and a headset. Unlike the original PlayStation, which requires the use of an official PlayStation Mouse to play mouse-compatible games, the few PlayStation 2 games with mouse support also work with a standard USB mouse as well as a USB trackball. Early versions of the console could be networked via an i.LINK port, though this had little game support and was ultimately removed in the "Slimline" model. Some third-party companies, such as Joytech, produced LCD monitor and speaker attachments for the PlayStation 2, which attach to the rear of the console. These allow users to play games without access to a television as long as there is access to mains electricity or a similar power source. There are many accessories for music games, such as dance pads for Dance Dance Revolution titles, Konami microphones for use with the Karaoke Revolution games, wireless microphones (sold with and used exclusively for SingStar games), various "guitar" controllers (for the GuitarFreaks series and Guitar Hero series), the drum set controller (sold in a box set (or by itself) with a "guitar" controller and a USB microphone (for use with Rock Band and Guitar Hero series), and a taiko drum controller for Taiko: Drum Master (2004). Sony released a Linux-based operating system kit, Linux for PlayStation 2, which included a keyboard, mouse, Ethernet adapter and HDD. In Europe and Australia, the consoles comes with a free Yabasic interpreter on the bundled demo disc. This allows users to create simple programs for the PlayStation 2. A port of the NetBSD project and BlackRhino GNU/Linux, an alternative Debian-based distribution, are also available. Game library The PlayStation 2 features a diverse global library. Premier franchises include the Grand Theft Auto, Final Fantasy, Silent Hill, Gran Turismo, Persona and Metal Gear series, most games of which were released exclusively for the console. Several prolific series first arrived on the console, including God of War (2005), Ratchet & Clank (2002), Jak and Daxter: The Precursor Legacy (2001), Katamari (2004), Devil May Cry (2001), and Kingdom Hearts (2002). The best-selling PlayStation 2 game is Grand Theft Auto: San Andreas (2004), which sold 17.33 million units. After the PlayStation 2's discontinuation in 2013, the cumulative software shipment was 1.54 billion units. Following its 2000 launch in Japan, the PlayStation 2 was released with eleven launch titles; early notable games included Ridge Racer V (2000) and Tekken Tag Tournament (2000). This was increased to 29 titles for its North American launch, and 30 in Europe. The last games released for the console were Final Fantasy XI: Seekers of Adoulin (2013) in Japan, FIFA 14 (2013) in North America, and Pro Evolution Soccer 2014 (2013) in the United Kingdom. Reception The PlayStation 2 received critical acclaim upon release. Initial reviews commended its hardware and graphics capabilities, ability to play DVDs, and backward compatibility with games and hardware for the original PlayStation. Early points of criticism included the lack of online support at the time, its inclusion of only two controller ports, and the system's price at launch compared to the Dreamcast in 2000. PC Magazine in 2001 called the console "outstanding", praising its "noteworthy components" such as the Emotion Engine CPU, 32 MB of RAM, support for IEEE 1394 (branded as "i.LINK" by Sony and "FireWire" by Apple), and the console's two USB ports while criticising its "expensive" games and its support for only two controllers without the multitap accessory. The inclusion of DVD playback was a major factor in the commercial success of the PlayStation 2. At launch, the PS2 was priced comparably to standalone DVD players, making it an attractive option for consumers. This multifunctionality also increased the console's appeal beyond traditional gamers and accelerated DVD adoption in households. There was, however, some concern about the system's abilities following the lack of anti-aliasing in the two most popular early titles, Ridge Racer V (2000) and Tekken Tag Tournament (2000). It was exacerbated for a period of time post-launch amid concerns about the relative lack of new quality software. This situation was eventually turned around following a spate of highly acclaimed games in the final quarter of 2001. Later reviews, especially after the launch of the competing GameCube and Xbox systems, continued to praise the PlayStation 2's large game library and DVD playback, while routinely criticising the PlayStation 2's lesser graphics performance compared to the newer systems and its rudimentary online service compared to Xbox Live. In 2002, CNET rated the console 7.3 out of 10, calling it a "safe bet" despite not being the "newest or most powerful", noting that the console "yields in-game graphics with more jagged edges". CNET also criticised the DVD playback functionality, claiming that the console's video quality was "passable" and that the playback controls were "rudimentary", recommending users to purchase a remote control. The console's two controller ports and the high cost of its memory cards were also a point of criticism. The slim model of the PlayStation 2 received positive reviews for its small size and built-in networking, but received criticism for easily overheating due to the exclusion of the original model's built-in fan. The requirement for a separate power adapter was criticised while the top-loading disc drive was noted as being less likely to break compared to the tray-loading drive of the original model. The PlayStation 2 overcame the earlier launch of the Sega's Dreamcast and then fended off competition from Microsoft's newcomer Xbox and Nintendo's GameCube. Its immense success and failure of the Dreamcast were among the main factors which led to Sega abandoning the console market entirely. Sony's integration of a DVD player into the console not only positioned it as a cost-effective home entertainment device, but also helped broaden its reach beyond traditional gaming audiences. This feature contributed to the PlayStation 2's widespread adoption, particularly as DVD technology was gaining popularity. Additionally, the console served as the exclusive platform for several early landmark titles such as Grand Theft Auto III (2001), Final Fantasy X (2001), and Metal Gear Solid 2: Sons of Liberty (2001), during a period marked by significant innovation in game design. This era saw the emergence of cinematic storytelling and expansive open-world gameplay, which further solidified the system's appeal. According to Piers Harding-Rolls, a senior analyst at IHS Screen Digest, Sony's marketing strategy—particularly its alignment with association football—was instrumental in securing strong market penetration in regions where console gaming had previously been underdeveloped. In its later years, the PlayStation 2 expanded its demographic by incorporating lifestyle and social games, further enhancing its longevity and appeal during the mid-2000s. The PlayStation 2 has often ranked among the best video game consoles. In 2020, Keith Stuart from The Guardian named it as the second best console, declaring that its "utter dominance" and technical prowess heralded a golden era in video gaming. IGN ranked the PlayStation 2 in 2009 as the third best console, noting its diverse game library and appeal towards all audiences to be a strong testament to its "staying power". In 2018, Retro Gamer named it the fifth best console, similarly crediting its large library and appeal to developers as key factors in gaining mass success, lauding it as a machine with "mad architecture". See also References |
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[SOURCE: https://en.wikipedia.org/wiki/Federal_holidays_in_the_United_States] | [TOKENS: 1620] |
Contents Federal holidays in the United States Federal holidays in the United States are 11 calendar dates designated by the U.S. federal government as holidays. On these days non-essential U.S. federal government offices are closed and federal employees are paid for the day off. Federal holidays are designated by the United States Congress in Title V of the United States Code (5 U.S.C. § 6103). Congress only has authority to create holidays for federal institutions (including federally-owned properties), employees, and the District of Columbia. As a general rule of courtesy, custom, and sometimes regulation, other institutions, such as banks, businesses, schools, and the financial markets, may be closed on federal holidays. In various parts of the country, state and city holidays may be observed concurrently with federal holidays. History The history of national holidays in the United States dates back to June 28, 1870, when Congress created national holidays "to correspond with similar laws of States around the District...and...in every State of the Union." Although at first applicable only to federal employees in Washington, D.C., Congress extended coverage in 1885 to all federal employees. The original four holidays in 1870 were: New Years Day celebrates the beginning of the new calendar year on January 1. The July 4th Independence Day commemorates the United States Declaration of Independence in 1776. On October 3, 1789, at the request of the U.S. Congress, President George Washington issued a Thanksgiving proclamation designating November 26, 1789 as a day of "public thanksgiving and prayer" for the "People of the United States". Thanksgiving has been proclaimed in the U.S. for various months and days of the week, including March, August, September, November, December, and on Sundays. Since 1941, it has been celebrated on the fourth Thursday in November. Celebrated on December 25 around the world, Christmas is the day that Christians remember the birth and incarnation of Jesus Christ. In the United States, Christmas Day as a federal or public holiday is sometimes objected to by various non-Christians, usually due to its ties with Christianity. In December 1999, the Western Division of the United States District Court for the Southern District of Ohio, in the case Ganulin v. United States, denied the charge that Christmas Day's federal status violated the Establishment Clause of the Constitution, ruling that "the Christmas holiday has become largely secularized", and that "by giving federal employees a paid vacation day on Christmas, the government is doing no more than recognizing the cultural significance of the holiday". George Washington's Birthday became a federal holiday in 1879. In 1888 and 1894, respectively, Decoration Day (later Memorial Day) and Labor Day were created. Armistice Day was established in 1938 to honor the end of World War I, and the scope of the holiday was expanded to honor American soldiers who fought in World War II and the Korean War when it was renamed Veterans Day in 1954, commemorating all veterans. In 1968, the Uniform Monday Holiday Act gave several holidays "floating" dates so that they always fall on a Monday, and also established Columbus Day. In 1983, President Ronald Reagan signed the bill that created Martin Luther King Jr. Day. It was first observed three years later, although some states resisted making it a state holiday. It was finally celebrated both nationally and by each of the states in 2000. King's birthday is January 15. On June 17, 2021, President Joe Biden signed the law that made June 19 a federal holiday. Officially designated as "Juneteenth National Independence Day", Juneteenth commemorates June 19, 1865, symbolic of the ending of slavery in the United States at the conclusion of the American Civil War. List of federal holidays Most of the 11 U.S. federal holidays are also state holidays. Five of the "floating" date holidays always fall on a Monday; the remaining floating holiday, Thanksgiving, is always on a Thursday. The rest are on fixed dates. A fixed date holiday that falls on a weekend (Saturday and Sunday) is usually observed for federal employees on the closest weekday: a holiday falling on a Saturday is observed on the preceding Friday, while a holiday falling on a Sunday is observed on the succeeding Monday. The official names come from the statute that defines holidays for federal employees. 1938 (federal holiday) 1941 (received permanent observation date) Inauguration Day, held on January 20 every four years following a quadrennial presidential election, if not falling on the Birthday of Martin Luther King, Jr., is considered a paid holiday for federal employees in the Washington, D.C., area by the Office of Personnel Management. It is not considered a federal holiday in the United States equivalent to the eleven holidays mentioned above. Although many states recognize most or all federal holidays as state holidays, the federal government cannot enact laws to compel them to do so. States can recognize other days as state holidays that are not federal holidays. For example, the State of Texas recognizes all federal holidays except Columbus Day, and recognizes the Friday after Thanksgiving, Christmas Eve, and the day after Christmas as state holidays. Texas does not follow the federal rule of closing either the Friday before, if a holiday falls on a Saturday, or the Monday after if a holiday falls on a Sunday. Offices are open on those Fridays or Mondays. Texas has "partial staffing holidays", such as March 2, which is Texas Independence Day, and "optional holidays", such as Good Friday. Private employers are not required to observe federal or state holidays, the key exception being federally-chartered banks. Some private employers, often by a union contract, pay a differential such as time-and-a-half or double-time to employees who work on some federal holidays. Employees not specifically covered by a union contract might only receive their standard pay for working on a federal holiday, depending on the company policy. Legal holidays due to presidential proclamation Federal law also provides for the declaration of other public holidays by the President of the United States. Generally the president will provide a reasoning behind the elevation of the day, and call on the people of the United States to observe the day "with appropriate ceremonies and activities." Examples of presidentially declared holidays were the days of the funerals for former Presidents Ronald Reagan, Gerald Ford, George H. W. Bush, and Jimmy Carter; when federal government offices are closed and employees given a paid holiday. In addition, occasionally the President will grant Christmas Eve as a holiday or partial holiday (the latter generally being four hours for full-time employees). Proposed federal holidays Many other federal holidays have been proposed. However, as the U.S. federal government is a large employer, these holidays are expensive. If a holiday is controversial, opposition will generally prevent any bill enacting it from passing. For example, Martin Luther King Jr. Day, marking King's birthday, took much effort to pass and for all states to recognize it. It was not until 2000 that this holiday was officially observed in all 50 states. The following list is an example of holidays that have been proposed and reasons why they are not observed at the federal level. Some of these holidays are observed at the state level. Controversy Some Native American groups protest the observance of Columbus Day, mainly due to the controversy of Columbus' arrival to the Americas. Alaska, Colorado, Florida, Hawaii, Iowa, Louisiana, Maine, Michigan, Minnesota, New Mexico, North Carolina, Oregon, South Dakota, Vermont, Washington, and Wisconsin do not recognize Columbus Day. Nevada recognizes it, but schools and most businesses remain open because it falls too close to Nevada Day (which is a full holiday). Hawaii and South Dakota mark the day with an alternative holiday or observance. South Dakota is the only state to recognize Native American Day as an official state holiday. See also References External links |
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[SOURCE: https://he.wikipedia.org/wiki/Grand_Theft_Auto:_Liberty_City_Stories] | [TOKENS: 1755] |
תוכן עניינים Grand Theft Auto: Liberty City Stories PlayStation Portable: ב-25 באוקטובר 2005 (ארצות הברית) פלייסטיישן 2: 6 ביוני 2006 (ארצות הברית) IOS:דצמבר 17 2015 Grand Theft Auto: Liberty City Stories, ידוע גם בראשי התיבות GTA: LCS, הוא משחק וידאו מסדרת משחקי Grand Theft Auto בגרפיקת ה-3D. על פי הסקרים לחודש יולי 2006, משחק זה הוא הנמכר ביותר לקונסולת ה-PSP. רבים מחשיבים משחק זה כחידוש למשחק GTA 3, אך בפועל הוא מהווה משחק נוסף שמשמש כפריקוול ל-GTA 3 באותו מקום התרחשות, ומכאן שמו "Liberty City Stories" ("סיפורי עיר החופש" בתרגום חופשי לעברית). ב-17 בדצמבר 2015 הוא שוחרר למערכת ההפעלה IOS, וב-11 בפברואר 2016 שוחרר למערכת ההפעלה אנדרואיד. מקום ההתרחשות אירועי המשחק מתפתחים בשנת 1998, שלוש שנים לפני אירועי המשחק GTA 3. טוני סיפרני חוזר לעיר לאחר מספר שנים בהן חי בסתר מאחר שרצח ראש מאפיה לבקשת דון סלבאטורי לאוני. כאות תודה סלבאטור נותן לו עבודה. בזמן ההתרחשות של "Liberty City Stories", טוני סיפריאני מבצע משימות שונות מאנשים שונים, בהם כלולים: סלבטורי ליאוני, וינצ'נזו סילי, מריה לטורה, JD א'וטול, דונלד לאב, הנבל הראשי של המשחק מסימו טוריני, ליאון מק'אפרי ואף אימו של טוני. העיר ליברטי סיטי במשחק זה שונה מהעיר ב-GTA Advance. אך דומה מאוד לעיר ב-GTA 3 לדוגמה, ה"סקס קלאב סבן" של לודג'י גוטרלי נקרא כאן "Paulie's Revue Bar" ובעליו הוא JD אוטול שעובד תחת משפחת המאפיה סינדאקו. JD נהרג על ידי מיקי המפיסטס עוזרו של לואיג'י, כמו כן השחקן רואה בהמשך המשחק סצנה בה המועדון מקבל בעלים חדשים ואת שמו החדש. יותר מכך, בעיר קיימת שכונה חדשה בשם "איטליה הקטנה" שלא קיימת בליברטי סיטי בתקופת המשחק GTA 3 אך גורל שכונה זו מתגלה לשחקן באחת ממשימות המשחק, כך שההגיון בין המשחקים השונים נשמר. השינויים מתבטאים גם במעברים בין האיים. הבנייה של הגשר בין "פורטלנד איילנד" ו"סטנטון איילנד" וכך גם המערה המחברת ביניהם ב-GTA 3 עדיין לא הסתיימה. רק חלק מין המערה פתוח והוא מגיע לצד הצפוני של האי "Shoreside Vale" עד לצד הדרומי. הגשר "קלאהן" (שמתפוצץ בתחילת המשחק GTA 3) בתהליכי בנייה גם הוא. רק לאחר המשימה "Driving Mr. Leone" בניית הגשר מסתיימת והשחקן יכול להגיע לאי סטאונטון. בליברטי סיטי מופיעים גם האופנועים, שלא היו קיימים ב-GTA 3. דמויות קישורים חיצוניים |
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[SOURCE: https://en.wikipedia.org/wiki/Nevada] | [TOKENS: 12287] |
Contents Nevada Nevada (/nəˈvædə/ ⓘ nə-VAD-ə; Spanish: [neˈβaða] ⓘ) is a landlocked state in the Western United States. It is also sometimes placed in the Mountain West and Southwestern United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive and the 31st-most populous U.S. state. Nearly three-quarters of Nevada's population live in Clark County, which contains the Las Vegas–Paradise metropolitan area. Nevada's capital is Carson City. Las Vegas is the largest city in the state. Nevada is officially known as the "Silver State" because of the importance of silver to its history and economy. It is also known as the "Battle Born State" because it achieved statehood during the Civil War; as the "Sagebrush State", for the native plant of the same name; and as the "Sage-hen State". Native Americans of the Paiute, Shoshone, and Washoe tribes inhabit what is now Nevada. The first Europeans to explore the region were Spanish. They called the region Nevada (snowy) because of the snow which covered the mountains in winter, similar to the Sierra Nevada in Spain. The area formed from mostly Alta California and part of Nuevo México's territory within the Viceroyalty of New Spain, which gained independence as Mexico in 1821. The United States annexed the area in 1848 after its victory in the Mexican–American War, and it was incorporated as part of the New Mexico and Utah Territory in 1850. The discovery of silver at the Comstock Lode in 1859 led to a population boom that became an impetus to the creation of Nevada Territory out of western Utah Territory in 1861. Nevada became the 36th state on October 31, 1864, as the second of two states added to the Union during the Civil War (the first being West Virginia). Nevada is known for its libertarian laws. In 1940, with a population of just over 110,000 people, Nevada was by far the least-populated state, with less than half the population of the next least-populous state, Wyoming. However, legalized gambling and lenient marriage and divorce laws transformed Nevada into a major tourist destination in the 20th century. Nevada is the only U.S. state where prostitution is legal, though it is illegal in its most populated regions – Clark County (Las Vegas), Washoe County (Reno) and Carson City (which, as an independent city, is not within the boundaries of any county). The tourism industry remains Nevada's largest employer, with mining continuing as a substantial sector of the economy: Nevada is the fourth-largest producer of gold in the world. The state's name means "snowy" in Spanish, referring to Nevada's extensive number of mountain ranges capped with snow in winter, which help make Nevada among the highest US states by mean altitude. These include the Carson Range portion of the Sierra Nevada (and about 1/3 of Lake Tahoe by surface area), as well as the Toiyabe Range, Ruby Mountains, and Spring Mountains (which exemplify the sky islands of the Great Basin montane forests), in western, central, northeastern, and southern Nevada, respectively. Nevada is the driest U.S. state, both lying in the rain shadow of the Sierra Nevada and receiving among the highest solar irradiance of any U.S. state, and is thus largely desert and semi-arid. Nevada comprises the majority of the Great Basin, as well as a large portion of the Mojave Desert. In 2020, 80.1% of the state's land was managed by various jurisdictions of the U.S. federal government, both civilian and military. Droughts in Nevada, which are influenced by climate change, have been increasing in frequency and severity, putting a further strain on Nevada's water security. Nonetheless, Nevada is among the leaders in adapting to climate change, including via climate science at Desert Research Institute, extensive water recycling in the Las Vegas metropolitan area, voter-mandated investment in solar power, hosting leading electric vehicle manufacturing ecosystem resources at the largest industrial park in the U.S., and developing the largest lithium mine in the U.S. for use in electric batteries. Etymology The name "Nevada" comes from the Spanish adjective nevada ([neˈβaða]), meaning "snowy" or "snow-covered". The state takes its name from the Nevada Territory, which in turn may have been named either for the Sierra Nevada (Spain) mountain range, or for the Sierra Nevada mountain range lying mostly in neighboring California, or just as a descriptive name for a range of snowy mountains. A number of other mountain ranges in Spanish-speaking countries are also named "Sierra Nevada". Nevadans pronounce the second syllable with the "a" of "apple" (/nəˈvædə/). Despite this, some people from outside of the state pronounce it with the "a" of "palm" (/nəˈvɑːdə/). Although the quality, but not the length, of the latter pronunciation is closer to the Spanish pronunciation (Spanish /a/ is open central [ä], whereas American English /ɑː/ varies from back [ɑː] to central [äː]), it is not the pronunciation used by Nevadans. State Assemblyman Harry Mortenson proposed a bill to recognize the alternative pronunciation of Nevada, though the bill was not supported by most legislators and never received a vote. The Nevadan pronunciation is the one used by the state legislature. At one time, the state's official tourism organization, TravelNevada, stylized the name of the state as "Nevăda", with a breve over the a indicating the locally preferred pronunciation, which was also available as a license plate design until 2007. History Before the arrival of Europeans, the earliest inhabitants were Indigenous tribes including the Goshute, Southern Paiute, Mohave, and Wašišiw (Washoe people). Francisco Garcés was the first European in the area. Nevada was annexed as a part of the Spanish Empire in the northwestern territory of New Spain. Administratively, the area of Nevada was part of the Commandancy General of the Provincias Internas in the Viceroyalty of New Spain. Nevada became a part of Alta California (Upper California) province in 1804 when the Californias were split. With the Mexican War of Independence won in 1821, the province of Alta California became a territory (state) of Mexico, with a small population. Jedediah Smith entered the Las Vegas Valley in 1827, Peter Skene Ogden traveled the Humboldt River in 1828, and in 1829 a merchant from Nuevo México named Antonio Armijo streamlined travel along the Old Spanish Trail. Chronicling Armijo's route his scout Raphael Rivera was the first to name Las Vegas, in an 1830 report to governor José Antonio Chaves. Following the suggestions by Rivera of a spring, on the published expedition's map, located in the Las Vegas area John C. Frémont set up camp in Las Vegas Springs in 1844. In 1847, Mormons established the State of Deseret, claiming all of Nevada within the Great Basin and the Colorado watershed. They built the first permanent settlement in what is now Nevada, called Mormon Station (now Genoa), in 1851. Additionally, in June 1855, William Bringhurst and 29 other Mormon missionaries built the first permanent structure, a 150-foot square adobe fort, northeast of downtown Las Vegas, converging on the Spanish and Mormon Roads. The fort remained under Salt Lake City's control until the winter of 1858–1859, and the route remained largely under the control of Salt Lake City and Santa Fe tradespersons. As such, these pioneers laid the foundation for the emergence of the initial settlements between the Sierra Nevadas and Mojave Desert and within the Las Vegas Valley. The enduring influence of New Mexico and Utah culture has since profoundly impacted Nevada's identity, manifesting through New Mexican cuisine and Mormon foodways or New Mexican and Mormon folk musics, into the fabric of Nevada's own cultural landscape. As a result of the Mexican–American War and the Treaty of Guadalupe Hidalgo, Mexico permanently lost Alta California in 1848. The new areas acquired by the United States continued to be administered as territories. As part of the Mexican Cession (1848) and the subsequent California Gold Rush that used Emigrant Trails through the area, the state's area evolved first as part of the Utah Territory and New Mexico Territory, then the Nevada Territory (March 2, 1861; named for the Sierra Nevada). The first discovery of a major U.S. deposit of silver ore occurred in Comstock Lode under Virginia City, Nevada, in 1859. On March 2, 1861, the Nevada Territory separated from the Utah Territory and adopted its current name, shortened from The Sierra Nevada (Spanish for "snow-covered mountain range"). The 1861 southern boundary is commemorated by Nevada Historical Markers 57 and 58 in the Lincoln and Nye counties. Eight days before the presidential election of 1864, Nevada became the 36th state in the Union, despite lacking the minimum 60,000 residents that Congress typically required a potential state to have in order to become a state. At the time, Nevada's population was little more than 40,000. Governor James W. Nye was frustrated that previous attempts to send the constitution via overland mail and by sea had failed by October 24, so on October 26 the full text was sent by telegraph at a cost of $4,303.27[c] – the most costly telegraph on file at the time for a single dispatch, equivalent to $88,583.27 in 2025. Finally, the response from Washington came on October 31, 1864: "the pain is over, the child is born, Nevada this day was admitted into the Union". Statehood was rushed to the date of October 31 to help ensure Abraham Lincoln's reelection on November 8 and post-Civil War Republican dominance in Congress, as Nevada's mining-based economy tied it to the more industrialized Union. As it turned out, however, Lincoln and the Republicans won the election handily and did not need Nevada's help. Nevada is one of only two states to significantly expand its borders after admission to the Union, with the other being Missouri, which acquired additional territory in 1837 due to the Platte Purchase. In 1866, another part of the western Utah Territory was added to Nevada in the eastern part of the state, setting the current eastern boundary. Nevada achieved its current southern boundaries on January 18, 1867, when it absorbed the portion of Pah-Ute County in the Arizona Territory west of the Colorado River, essentially all of present-day Nevada south of the 37th parallel. The transfer was prompted by the discovery of gold in the area, and officials thought Nevada would be better able to oversee the expected population boom. This area includes all of what is now Clark County and the southern-most portions of Esmeralda, Lincoln, and Nye counties. Mining shaped Nevada's economy for many years (see Silver mining in Nevada). When Mark Twain lived in Nevada during the period described in Roughing It, mining had led to an industry of speculation and immense wealth. Both mining and population temporarily declined in the late 19th century. However, the rich silver strike at Tonopah in 1900, followed by strikes in Goldfield and Rhyolite, created a second mining boom in Nevada and Nevada's population. Unregulated gambling was commonplace in the early Nevada mining towns but was outlawed in 1909 as part of a nationwide anti-gambling crusade. Because of subsequent declines in mining output and the decline of the agricultural sector during the Great Depression, Nevada again legalized gambling on March 19, 1931, with approval from the legislature. Governor Fred B. Balzar's signature enacted the most liberal divorce laws in the country and open gambling. The reforms came just eight days after the federal government presented the $49 million construction contract for Boulder Dam (now Hoover Dam). The Nevada Test Site, 65 miles (105 km) northwest of the city of Las Vegas, was founded on January 11, 1951, for the testing of nuclear weapons. The site consists of about 1,350 square miles (3,500 km2) of the desert and mountainous terrain. Nuclear testing at the Nevada Test Site began with a 1 kiloton of TNT (4.2 TJ) nuclear bomb dropped on Frenchman Flat on January 27, 1951. The last atmospheric test was conducted on July 17, 1962, and the underground testing of weapons continued until September 23, 1992. The location is known for having the highest concentration of nuclear-detonated weapons in the U.S. Over 80% of the state's area is owned by the federal government. This is mainly because homesteads were not permitted in large enough sizes to be viable in the arid conditions that prevail throughout desert Nevada. Instead, early settlers would homestead land surrounding a water source, and then graze livestock on the adjacent public land, which is useless for agriculture without access to water (this pattern of ranching still prevails). The COVID-19 pandemic was confirmed in Nevada on March 5, 2020. Because of concerns about coronavirus disease 2019 (COVID-19), Nevada governor Steve Sisolak declared a state of emergency on March 12, 2020. Four days later, Nevada reported its first death. On March 17, 2020, Sisolak ordered the closure of non-essential businesses in the state to help prevent the spread of the coronavirus. Several protests were held against Sisolak's shutdown order beginning in April 2020. Nevada launched the first phase of its reopening on May 9, 2020. Restaurants, retailers, outdoor malls, and hair salons were among the businesses allowed to reopen, but with precautions in place, such as limiting occupancy to 50 percent. A second phase went into effect on May 29, 2020. It allowed for the reopening of state parks and businesses such as bars, gyms, and movie theaters. Casinos began reopening on June 4, 2020. Geography Nevada is almost entirely within the Basin and Range Province and is broken up by many north–south mountain ranges. Most of these ranges have endorheic valleys between them. Much of the northern part of the state is within the Great Basin, a mild desert that experiences hot temperatures in the summer and cold temperatures in the winter. Occasionally, moisture from the Arizona Monsoon will cause summer thunderstorms; Pacific storms may blanket the area with snow. The state's highest recorded temperature was 125 °F (52 °C) in Laughlin (elevation of 605 feet or 184 meters) on June 29, 1994. The coldest recorded temperature was −52 °F (−47 °C) set in San Jacinto in 1972, in the northeastern portion of the state. The Humboldt River crosses the state from east to west across the northern part of the state, draining into the Humboldt Sink near Lovelock. Several rivers drain from the Sierra Nevada eastward, including the Walker, Truckee, and Carson rivers. All of these rivers are endorheic basins, ending in Walker Lake, Pyramid Lake, and the Carson Sink, respectively. However, not all of Nevada is within the Great Basin. Tributaries of the Snake River drain the far north, while the Colorado River, which also forms much of the boundary with Arizona, drains much of southern Nevada. The mountain ranges, some of which have peaks above 13,000 feet (4,000 m), harbor lush forests high above desert plains, creating sky islands for endemic species. The valleys are often no lower in elevation than 3,000 feet (910 m), while some in central Nevada are above 6,000 feet (1,800 m). The southern third of the state, where the Las Vegas area is situated, is within the Mojave Desert. The area receives less rain in the winter but is closer to the Arizona Monsoon in the summer. The terrain is also lower, mostly below 4,000 feet (1,200 m), creating conditions for hot summer days and cool to chilly winter nights. Nevada and California have by far the longest diagonal line (in respect to the cardinal directions) as a state boundary at just over 400 miles (640 km). This line begins in Lake Tahoe nearly 4 miles (6.4 km) offshore (in the direction of the boundary), and continues to the Colorado River where the Nevada, California, and Arizona boundaries merge 12 miles (19 km) southwest of the Laughlin Bridge. The largest mountain range in the southern portion of the state is the Spring Mountain Range, just west of Las Vegas. The state's lowest point is along the Colorado River, south of Laughlin. Nevada has 172 mountain summits with 2,000 feet (610 m) of prominence. Nevada ranks second, after Alaska, for the greatest number of mountains in the United States, followed by California, Montana, and Washington. Nevada is the driest state in the United States. It is made up of mostly desert and semi-arid climate regions, and, with the exception of the Las Vegas Valley, the average summer diurnal temperature range approaches 40 °F (22 °C) in much of the state. While winters in northern Nevada are long and fairly cold, the winter season in the southern part of the state tends to be of short duration and mild. Most parts of Nevada receive scarce precipitation during the year. The most rain that falls in the state falls on the east and northeast slopes of the Sierra Nevada. The average annual rainfall per year is about 7 inches (180 mm); the wettest parts get around 40 inches (1,000 mm). Nevada's highest recorded temperature is 125 °F (52 °C) at Laughlin on June 29, 1994, and the lowest recorded temperature is −50 °F (−46 °C) at San Jacinto on January 8, 1937. Nevada's 125 °F (52 °C) reading is the third highest statewide record high temperature of a U.S. state, just behind Arizona's 128 °F (53 °C) reading and California's 134 °F (57 °C) reading. The vegetation of Nevada is diverse and differs by state area. Nevada contains six biotic zones: alpine, sub-alpine, ponderosa pine, pinion-juniper, sagebrush and creosotebush. Nevada is divided into political jurisdictions designated as counties. Carson City is officially a consolidated municipality, meaning it legally functions as both a city and a county. As of 1919, there were 17 counties in the state, ranging from 146 to 18,159 square miles (380 to 47,030 km2). Lake County, one of the original nine counties formed in 1861, was renamed Roop County in 1862. Part of the county became Lassen County, California, in 1864, resolving border uncertainty. In 1883, Washoe County annexed the portion that remained in Nevada. In 1969, Ormsby County was dissolved and the Consolidated Municipality of Carson City was created by the Legislature in its place coterminous with the old boundaries of Ormsby County. Bullfrog County was formed in 1987 from part of Nye County. After the creation was declared unconstitutional, the county was abolished in 1989. Humboldt County was designated as a county in 1856 by Utah Territorial Legislature and again in 1861 by the new Nevada Legislature. Clark County is the most populous county in Nevada, accounting for nearly three-quarters of its residents. Las Vegas, Nevada's most populous city, has been the county seat since the county was created in 1909 from a portion of Lincoln County, Nevada. Before that, it was a part of Arizona Territory. Clark County attracts numerous tourists: An estimated 44 million people visited Clark County in 2014. Washoe County is the second-most populous county of Nevada. Its county seat is Reno. Washoe County includes the Reno–Sparks metropolitan area. Lyon County is the third most populous county. It was one of the nine original counties created in 1861. It was named after Nathaniel Lyon, the first Union General to be killed in the Civil War. Its current county seat is Yerington. Its first county seat was established at Dayton on November 29, 1861. Parks and recreation areas There are 68 designated wilderness areas in Nevada, protecting some 6,579,014 acres (2,662,433 ha) under the jurisdiction of the National Park Service, U.S. Forest Service, and Bureau of Land Management. The Nevada state parks comprise protected areas managed by the state of Nevada, including state parks, state historic sites, and state recreation areas. There are 24 state park units, including Van Sickle Bi-State Park which opened in July 2011 and is operated in partnership with the adjacent state of California. Demographics The United States Census Bureau determined Nevada had a population of 3,104,614 at the 2020 U.S. census. In 2022, the estimated population of Nevada was 3,177,772, an increase of 73,158 residents (2.36%) since the 2020 census. Nevada had the highest percentage growth in population from 2017 to 2018. At the 2020 census, 6.0% of the state's population were reported as under 5, 22.5% were under 18, and 16.1% were 65 or older. Females made up about 49.8% of the population. 19.1% of the population was reported as foreign-born. Since the 2020 census, the population of Nevada had a natural increase of 2,374 (the net difference between 42,076 births and 39,702 deaths); and an increase due to net migration of 36,605 (of which 34,280 was due to domestic and 2,325 was due to international migration). The center of population of Nevada is in southern Nye County. In this county, the unincorporated town of Pahrump, 60 miles (97 km) west of Las Vegas on the California state line, has grown very rapidly from 1980 to 2020. At the 2020 census, the town had 44,738 residents. Las Vegas grew from a gulch of 100 people in 1900 to 10,000 by 1950 to 100,000 by 1970, and was America's fastest-growing city and metropolitan area from 1960 to 2000. From about the 1940s until 2003, Nevada was the fastest-growing state in the U.S. percentage-wise. Between 1990 and 2000, Nevada's population increased by 66%, while the nation's population increased by 13%. More than two-thirds of the population live in Clark County, which is coextensive with the Las Vegas metropolitan area. Thus, in terms of population, Nevada is one of the most centralized states in the nation. Henderson and North Las Vegas are among the top 20 fastest-growing U.S. cities with populations over 100,000. The rural community of Mesquite 65 miles (105 km) northeast of Las Vegas was an example of micropolitan growth in the 1990s and 2000s. Other desert towns like Indian Springs and Searchlight on the outskirts of Las Vegas have seen some growth as well. Since 1950, the rate of population born in Nevada has never peaked above 27 percent, the lowest rate of all states. In 2012, only 25% of Nevadans were born in Nevada. According to HUD's 2022 Annual Homeless Assessment Report, there were an estimated 7,618 homeless people in Nevada. According to the 2022 American Community Survey, 30.3% of Nevada's population were of Hispanic or Latino origin (of any race): Mexican (22%), Cuban (1.5%), Salvadoran (1.5%), Puerto Rican (1%), and other Hispanic or Latino origin (4.3%). The largest European ancestry groups were: German (8.9%), English (8.1%), Irish (7.2%), and Italian (4.8%). The largest Asian ancestry groups in the state were Filipino (6.4%) and Chinese (1.9%). In 1980, non-Hispanic whites made up 83.2% of the state's population. As of 2011, 63.6% of Nevada's population younger than age 1 were minorities. Las Vegas is a majority-minority city. According to the United States Census Bureau estimates, as of July 1, 2018, non-Hispanic Whites made up 48.7% of Nevada's population. In Douglas, Mineral, and Pershing counties, a plurality of residents are of Mexican ancestry. In Nye County and Humboldt County, residents are mostly of German ancestry; Washoe County has many Irish Americans. Americans of English descent form pluralities in Lincoln County, Churchill County, Lyon County, White Pine County, and Eureka County. Asian Americans have lived in the state since at least the 1850s, when the California gold rush brought thousands of Chinese miners to Washoe County. They were followed by a few hundred Japanese farmworkers in the late 19th century. By the late 20th century, many immigrants from China, Japan, Korea, the Philippines, Bangladesh, India, and Vietnam came to the Las Vegas metropolitan area. The city now has a significant Asian American community, with a mostly Chinese and Taiwanese area known as "Chinatown" west of I-15 on Spring Mountain Road. Filipino Americans form the largest Asian American group in the state, with a population of more than 202,000. They comprise 59.8% of the Asian American population in Nevada and constitute about 6.4% of the entire state's population. Mining booms drew many Greek and Eastern European immigrants to Nevada. In the early twentieth century, Greeks, Slavs, Danes, Japanese, Italians, and Basques poured into Nevada. Chileans were found in the state as early as 1870. During the mid-1800s, a significant number of European immigrants, mainly from Ireland, England and Germany, arrived in the state with the intention of capitalizing on the thriving mining sector in the region. Native American tribes in Nevada are the Northern and Southern Paiute, Western Shoshone, Goshute, Hualapai, Washoe, and Ute tribes. Whites remain the largest racial or ethnic group in Nevada. Hispanics are the fastest growing ethnic group in Nevada. There is a growing Mexican and Central American population in Nevada. Many of Nevada's Latino immigrants are from Mexico, Guatemala and El Salvador. Nevada also has a growing multiracial population. The top countries of origin for immigrants in Nevada were Mexico (39.5 percent of immigrants), the Philippines (14.3 percent), El Salvador (5.2 percent), China (3.1 percent), and Cuba (3 percent). The majority of people in Nevada are of white (European) ancestry. A small portion trace their ancestry to Basque people recruited as sheepherders. Hispanics in Nevada are mainly of Mexican and Cuban heritage. Latinos comprise about one-fourth of Nevada's residents and are concentrated in the southeast in Nevada. African Americans live mainly in the Las Vegas and Reno area and constitute less than one-tenth of the population. Native Americans of the Paiute, Shoshone, and Washoe tribes live on several reservations in the state and make up a small fraction of Nevada's population. The most common ancestries in Nevada include Mexican, German, Irish, English, Italian and Asian. Nevada is the third most diverse state in the country, behind only Hawaii and California. Note: Births within the table do not add up, due to Hispanics being counted both by their ethnicity and by their race, giving a higher overall number. A small percentage of Nevada's population lives in rural areas. The culture of these places differs significantly from major metropolitan areas. People in these rural counties tend to be native Nevada residents, unlike in the Las Vegas and Reno areas, where the vast majority of the population was born in another state. The rural population is also less diverse in terms of race and ethnicity. Mining plays an important role in the economies of the rural counties, with tourism being less prominent. Ranching also has a long tradition in rural Nevada. Church attendance in Nevada is among the lowest of all U.S. states. In a 2009 Gallup poll only 30% of Nevadans said they attended church weekly or almost weekly, compared to 42% of all Americans (only four states were found to have a lower attendance rate than Nevada's). In 2020, the Public Religion Research Institute determined 67% of the population were Christian, reflecting a 1% increase in religiosity from 2014's separate Pew study. Major religious affiliations of the people of Nevada were, according to the Pew Research Center in 2014: Protestant 35%, Irreligious 28%, Roman Catholic 25%, Latter-day Saints 4%, Jewish 2%, Hindu less than 1%, Buddhist 0.5% and Muslim around 0.2%. Parts of Nevada (in the eastern parts of the state) are situated in the Mormon Corridor. The largest denominations by number of adherents in 2010 were the Roman Catholic Church with 451,070; The Church of Jesus Christ of Latter-day Saints with 175,149; and the Southern Baptist Convention with 45,535; Buddhist congregations 14,727; Baháʼí Faith 1,723; and Muslim 1,700. The most common non-English languages spoken in Nevada are Spanish, Tagalog and Chinese. Indigenous languages of Nevada include Northern Paiute, the Southern Paiute, Shoshone, and Washo. The top seven languages spoken in Nevada according to the U.S. Census data are Spanish, Tagalog, Chinese, Vietnamese, Korean, Amharic, Arabic, and Thai. Historically what is now Nevada has been inhabited mainly by the Paiute, Shoshone, and Washoe. The largest Native American tribes in Nevada according to the 2010 census are listed in the table below: Alaska Native alone one or more other races in any combination Economy The economy of Nevada is tied to tourism (especially entertainment and gambling related), mining, and cattle ranching. Nevada's industrial outputs are tourism, entertainment, mining, machinery, printing and publishing, food processing, and electric equipment. The Bureau of Economic Analysis estimates Nevada's total state product in 2018 was $170 billion. The state's per capita personal income in 2020 was $53,635, ranking 31st in the nation. Nevada's state debt in 2012 was calculated to be $7.5 billion, or $3,100 per taxpayer. In 2025, small businesses accounted for 99.3% of Nevada businesses, and employed 45.0% of its work force. As of May 2025, the state's unemployment rate was 5.5%. In portions of the state outside of the Las Vegas and Reno metropolitan areas mining plays a major economic role. By value, gold is by far the most important mineral mined. In 2022, 4,040,000 troy ounces (126 t) of gold worth $7.3 billion were mined in Nevada, and the state accounted for 4% of world gold production. Other minerals mined in Nevada include construction aggregates, copper, gypsum, diatomite and lithium. Despite its rich deposits, the cost of mining in Nevada is generally high, and output is very sensitive to world commodity prices. Cattle ranching is a major economic activity in rural Nevada. Nevada's agricultural outputs are cattle, hay, alfalfa, dairy products, onions, and potatoes. In 2020, there were an estimated 438,511 head of cattle and 71,699 head of sheep in Nevada. Most of these animals forage on rangeland in the summer, with supplemental feed in the winter. Calves are generally shipped to out-of-state feedlots in the fall to be fattened for the market. Over 90% of Nevada's 653,891 acres (264,620 ha) of cropland is used to grow hay, mostly alfalfa, for livestock feed. The largest employers in the state, as of the first fiscal quarter of 2011, are the following, according to the Nevada Department of Employment, Training and Rehabilitation: Infrastructure Amtrak's California Zephyr train uses the Union Pacific's original transcontinental railroad line in daily service from Chicago to Emeryville, California, serving Elko, Winnemucca, and Reno. Las Vegas has had no passenger train service since Amtrak's Desert Wind was discontinued in 1997. Amtrak Thruway buses provide connecting service from Las Vegas to trains at Needles, California, Los Angeles, and Bakersfield, California; and from Stateline, Nevada, to Sacramento, California. There have been a number of proposals to re-introduce service to either Los Angeles or Southern California with the privately run Brightline West having begun construction in 2024. The Union Pacific Railroad has some railroads in the north and south of Nevada. Greyhound Lines provide some bus service to the state. Interstate 15 (I-15) passes through the southern tip of the state, serving Las Vegas and other communities. I-215 and I-515 also serve the Las Vegas metropolitan area. I-80 crosses through the northern part of Nevada, roughly following the path of the Humboldt River from Utah in the east and the Truckee River westward through Reno into California. It has a spur route, I-580. Nevada also is served by several U.S. highways: US 6, US 50, US 93, US 95 and US 395. There are also 189 Nevada state routes. Many of Nevada's counties have a system of county routes as well, though many are not signed or paved in rural areas. Nevada is one of a few states in the U.S. that do not have a continuous interstate highway linking its two major population centers – the road connection between the Las Vegas and Reno areas is a combination of several different Interstate and U.S. highways. The Interstate 11 proposed routing may eventually remedy this.[citation needed] The state is one of just a few in the country to allow semi-trailer trucks with three trailers – what might be called a "road train" in Australia. But American versions are usually smaller, in part because they must ascend and descend some fairly steep mountain passes. RTC Transit is the public transit system in the Las Vegas metropolitan area. The agency is the largest transit agency in the state and operates a network of bus service across the Las Vegas Valley, including the use of The Deuce, double-decker buses, on the Las Vegas Strip and several outlying routes. RTC RIDE operates a system of local transit bus service throughout the Reno-Sparks metropolitan area. Other transit systems in the state include Carson City's JAC. Most other counties in the state do not have public transportation at all. Additionally, a 4-mile (6.4 km) monorail system provides public transportation in the Las Vegas area. The Las Vegas Monorail line services several casino properties and the Las Vegas Convention Center on the east side of the Las Vegas Strip, running near Paradise Road, with a possible future extension to Harry Reid International Airport. Several hotels also run their own monorail lines between each other, which are typically several blocks in length. Harry Reid International Airport in Las Vegas is the busiest airport serving Nevada. The Reno-Tahoe International Airport (formerly known as the Reno Cannon International Airport) is the other major airport in the state. Nevada has had a thriving solar energy sector. An independent study in 2013 concluded that solar users created a $36 million net benefit. However, in December 2015, the Public Utility Commission let the state's only power company, NV Energy, charge higher rates and fees to solar panel users, leading to an immediate collapse of rooftop solar panel use. In December 1987, Congress amended the Nuclear Waste Policy Act to designate Yucca Mountain nuclear waste repository as the only site to be characterized as a permanent repository for all of the nation's highly radioactive waste. In 2018, the National Low Income Housing Coalition calculated the discrepancy between available affordable housing units and renters who earn below the poverty line. In Nevada, only 15 affordable rental homes are available per 100 extremely low income (ELI) households. The shortage extended to a deficit in supply of 71,358 affordable rental homes. This was the largest discrepancy of any state. The most notable catalyst for this shortage was the Great Recession and housing crisis of 2007 and 2008. Since then, housing prices have increased while demand has increased, and supply has struggled to match the increase in demand. In addition, low-income service workers were slowly being pushed out by an influx of tech professionals. In Nevada there is essentially a standard of six-figure income to affordably rent a single-family home. Considering the average salary in Nevada, $54,842 per year, this standard is on average, unaffordable. The disproportionate cost of housing compared to average salary has led to 112,872 renters to be paying more than half of their yearly income towards housing. The definition of an affordable home is "one that a household can obtain for 30 percent or less of its annual income". So, there is clearly a long way to go in order to close the gap between housing prices and relative income in the state. Renters are looking for solutions to still be able to live in the state in a way that their income can support. As a result, single adults are being forced to split rent with other renters or move residences to farther outside metro areas. One solution being offered is to increase the supply of higher income positions within the state to make things more affordable. However, this would require Nevadans to retrain in new jobs or careers. Education Education in Nevada is achieved through public and private elementary, middle, and high schools, as well as colleges and universities. A May 2015 educational reform law expanded school choice options to 450,000 Nevada students who are at up to 185% of the federal poverty level. Education savings accounts (ESAs) are enabled by the new law to help pay the tuition for private schools. Alternatively, families "can use funds in these accounts to also pay for textbooks and tutoring". Approximately 86.9% of Nevada residents have attained at least a high school degree or equivalent, which is below the national average of 88.6%. Public school districts in Nevada include: The Nevada Aerospace Hall of Fame provides educational resources and promotes the aerospace and aviation history of the state. Law and government Under the Constitution of the State of Nevada, the powers of the Nevada government are divided among three separate departments: the executive consisting of the governor of Nevada and their cabinet along with the other elected constitutional officers; the legislative consisting of the Nevada Legislature, which includes the Assembly and the Senate; and the judicial consisting of the Supreme Court of Nevada and lower courts. The governor is the chief magistrate of Nevada, the head of the executive department of the state's government, and the commander-in-chief of the state's military forces. The current governor is Joe Lombardo, a Republican. The executive branch also consists of an independently elected lieutenant governor, secretary of state, state treasurer, state controller, and attorney general who function as a check and balance on the power of the governor. The Nevada Legislature is a bicameral body divided into an Assembly and Senate. Members of the Assembly serve two years, and members of the Senate serve four years. Both houses of the Nevada Legislature enacted term limits starting in 2010, with senators and assemblymen/women who are limited to a maximum of twelve years in each body (by appointment or election which is a lifetime limit) – a provision of the constitution which was upheld by the Supreme Court of Nevada in a unanimous decision. Each session of the legislature meets for a constitutionally mandated 120 days in every odd-numbered year, or longer if the governor calls a special session. On December 18, 2018, Nevada became the first in the United States with a female majority in its legislature. Women hold nine of the 21 seats in the Nevada Senate, and 23 of the 42 seats in the Nevada Assembly. The Supreme Court of Nevada is the state supreme court and the head of the Nevada Judiciary. Original jurisdiction is divided between the district courts (with general jurisdiction), and justice courts and municipal courts (both of limited jurisdiction). Appeals from District Courts are made directly to the Nevada Supreme Court, which under a deflective model of jurisdiction, has the discretion to send cases to the Court of Appeals for final resolution. Incorporated towns in Nevada, known as cities, are given the authority to legislate anything not prohibited by law. A recent movement has begun to permit home rule to incorporate Nevada cities to give them more flexibility and fewer restrictions from the Legislature. Town Boards for unincorporated towns are limited local governments created by either the local county commission, or by referendum, and form a purely advisory role and in no way diminish the responsibilities of the county commission that creates them. In 1900, Nevada's population was the smallest of all states and was shrinking, as the difficulties of living in a "barren desert" began to outweigh the lure of silver for many early settlers. Historian Lawrence Friedman has explained what happened next: Nevada, in a burst of ingenuity, built an economy by exploiting its sovereignty. Its strategy was to legalize all sorts of things that were illegal in California ... after the easy divorce came easy marriage and casino gaming. Even prostitution is legal in Nevada, in any county that decides to allow it. Quite a few of them do. With the advent of air conditioning for summertime use and Southern Nevada's mild winters, the fortunes of the state began to turn around, as it did for Arizona, making these two states the fastest growing in the Union. Nevada is the only state where prostitution is legal – in a licensed brothel in a county which has specifically voted to permit it. It is illegal in larger jurisdictions such as Clark County (which contains Las Vegas), Washoe County (which contains Reno), and the independent city of Carson City. Nevada's early reputation as a "divorce haven" arose from the fact that before the no-fault divorce revolution in the 1970s, divorces were difficult to obtain in the United States. Already having legalized gambling and prostitution, Nevada continued the trend of boosting its profile by adopting one of the most liberal divorce statutes in the nation. This resulted in Williams v. North Carolina (1942), 317 U.S. 287 (1942), in which the U.S. Supreme Court ruled North Carolina had to give "full faith and credit" to a Nevada divorce. The Court modified its decision in Williams v. North Carolina (1945), 325 U.S. 226 (1945), by holding a state need not recognize a Nevada divorce unless one of the parties was domiciled there at the time the divorce was granted and the forum state was entitled to make its own determination. As of 2009, Nevada's divorce rate was above the national average. Nevada's tax laws are intended to draw new residents and businesses to the state. Nevada has no personal income tax or corporate income tax. Since Nevada does not collect income data it cannot share such information with the federal government, the IRS. The state sales tax (similar to VAT or GST) in Nevada is variable depending upon the county. The statewide tax rate is 6.85%, with five counties (Elko, Esmeralda, Eureka, Humboldt, and Mineral) charging this amount. Counties may impose additional rates via voter approval or through approval of the state legislature; therefore, the applicable sales tax varies by county from 6.85% to 8.375% (Clark County). Clark County, which includes Las Vegas, imposes four separate county option taxes in addition to the statewide rate: 0.25% for flood control, 0.50% for mass transit, 0.25% for infrastructure, and 0.25% for more law enforcement. In Washoe County, which includes Reno, the sales tax rate is 7.725%, due to county option rates for flood control, the ReTRAC train trench project, and mass transit, and an additional county rate approved under the Local Government Tax Act of 1991. The minimum Nevada sales tax rate changed on July 1, 2009. The lodging tax rate in unincorporated Clark County, which includes the Las Vegas Strip, is 12%. Within the boundaries of the cities of Las Vegas and Henderson, the lodging tax rate is 13%. Corporations such as Apple Inc. allegedly have set up investment companies and funds in Nevada to avoid paying taxes. In 2009, the Nevada Legislature passed a bill creating a domestic partnership registry which enables same-sex couples to enjoy the same rights as married couples. Due to the landmark decision in the case of Obergefell v. Hodges, 576 U.S. 644 (2015), same-sex marriage was outright legalized in the state. Nevada provides a friendly environment for the formation of corporations, and many (especially California) businesses have incorporated in Nevada to take advantage of the benefits of the Nevada statute. Nevada corporations offer great flexibility to the board of directors and simplify or avoid many of the rules that are cumbersome to business managers in some other states. In addition, Nevada has no franchise tax, although it does require businesses to have a license for which the business has to pay the state. Similarly, many U.S. states have usury laws limiting the amount of interest a lender can charge, but federal law allows corporations to "import" these laws from their home state. Nevada has no cap on interest rates that may be agreed to in contracts. Nevada has very liberal alcohol laws. Bars are permitted to remain open 24 hours, with no "last call". Liquor stores, convenience stores and supermarkets may also sell alcohol 24 hours per day and may sell beer, wine and spirits. In 2016, Nevada voters approved Question 2, which legalized the possession, transportation and cultivation of personal use amounts of marijuana for adults age 21 years and older, and authorized the creation of a regulated market for the sale of marijuana to adults age 21 years and older through state-licensed retail outlets. Nevada voters had previously approved medical marijuana in 2000, but rejected marijuana legalization in a similar referendum in 2006. Marijuana in all forms remains illegal under federal law. Aside from cannabis legalization, non-alcohol drug laws are a notable exception to Nevada's otherwise libertarian principles. It is notable for having the harshest penalties for drug offenders in the country. Nevada remains the only state to still use mandatory minimum sentencing guidelines for possession of drugs. The Substance Abuse and Mental Health Services Administration (SAMHSA) reported, in their Behavioral Health Barometer for Nevada, published in 2014, changes to substance abuse patterns and addiction across the southwestern state. Between 2012 and 2013, adolescents in Nevada abused illicit substances at a slightly higher percentage than nationally. 10.2 percent of Nevada's adolescents abused illicit drugs compared to 9.2 percent across the United States. Between 2009 and 2013, 11.7 percent of all adolescents in the state reported abusing illicit, intoxicating substances in the month prior to the survey; this represents 25,000 adolescents. Nevada voters enacted a smoking ban ("The Nevada Clean Indoor Air Act") in November 2006 which became effective on December 8, 2006. It outlaws smoking in most workplaces and public places. Smoking is permitted in bars, but only if the bar serves no food, or the bar is inside a larger casino. Smoking is also permitted in casinos, certain hotel rooms, tobacco shops, and brothels. However, some businesses do not obey this law and the government tends not to enforce it. In 2011, smoking restrictions in Nevada were relaxed for certain places which allow only people 21 or older inside. In 2006, the crime rate in Nevada was about 24% higher than the national average rate, though crime has since decreased. Property crimes accounted for about 85% of the total crime rate in Nevada, which was 21% higher than the national rate. The remaining 20.3% were violent crimes. A complete listing of crime data in the state for 2013 can be found here: Politics Due to heavy growth in the southern portion of the state, there is a noticeable divide between the politics of northern and southern Nevada. Historically, northern Nevada has been very Republican. The more rural counties of the north are among the most conservative regions of the state. Carson City, the state's capital, is a Republican-leaning swing city/county. Washoe County, home to Reno, has historically been strongly Republican, but now has become a fairly balanced swing county, like the state as a whole. Clark County, home to Las Vegas, has been a stronghold for the Democratic Party since it was founded in 1909, having voted Republican only six times and once for a third-party candidate, although in recent times becoming more competitive, most notably in the 2024 Presidential Election where the Democratic Party's margin of victory was only 2.63 percentage points to Republicans. Clark and Washoe counties have long dominated the state's politics. Between them, they cast 87% of Nevada's vote, and elect a substantial majority of the state legislature. The last Republican to carry Clark County was George H. W. Bush in 1988, and the last Republican to carry Washoe County was George W. Bush in 2004. The great majority of the state's elected officials are from either Las Vegas or Reno. Donald Trump was able to carry Nevada with a statewide majority in 2024, despite losing both Clark and Washoe. In 2014, Republican Adam Laxalt, despite losing both Clark and Washoe counties, was elected Attorney General. However, he had lost Clark County only by 5.6% and Washoe County by 1.4%, attributable to lower turnout in these counties. Nevada has been won by the winner of nearly every presidential election since its first in 1864, only being carried by the defeated candidate eight times since statehood, most of which were before 1900. Since 1912 Nevada has been carried by the presidential victor the most out of any state (27 of 29 elections), the only exceptions being 1976 when it voted for Gerald Ford over Jimmy Carter and 2016 when the state was carried by Hillary Clinton over Donald Trump. This gives the state status as a political bellwether. It was one of only three states won by John F. Kennedy in the American West in the election of 1960, albeit narrowly. The state's U.S. Senators are Democrats Catherine Cortez Masto and Jacky Rosen. The Governorship is held by Joe Lombardo, a Republican. Nevada is the only U.S. state to have a none of the above option available on its ballots. Officially called None of These Candidates, the option was first added to the ballot in 1975 and is used in all statewide elections, including president, US Senate and all state constitutional positions. In the event "None of These Candidates" receives a plurality of votes in the election, the candidate with the next-highest total is elected. In a 2020 study, Nevada was ranked as the 23rd on the "Cost of Voting Index", which is a measure of "the ease of voting across the United States." Culture Resort areas like Las Vegas, Reno, Lake Tahoe, and Laughlin attract visitors from around the nation and world. In fiscal year 2022 Nevada casinos (not counting those with annual revenue under a million dollars) brought in US$10.7 billion in gaming revenue and another US$15.7 billion in non-gaming revenue. Nevada has by far the most hotel rooms per capita in the United States. According to the American Hotel and Lodging Association, there were 187,301 rooms in 584 hotels (of 15 or more rooms). The state is ranked just below California, Texas, Florida, and New York in the total number of rooms, but those states have much larger populations. Nevada has one hotel room for every 14 residents, far above the national average of one hotel room per 67 residents. Prostitution is legal in parts of Nevada in licensed brothels, but only counties with populations under 400,000 have the option to legalize it. Although prostitution is not a major part of the Nevada economy, employing roughly 300 women as independent contractors, it is a very visible endeavor. Of the 14 counties permitted to legalize prostitution under state law, eight have chosen to legalize brothels. State law prohibits prostitution in Clark County (which contains Las Vegas), and Washoe County (which contains Reno). However, prostitution is legal in Storey County, which is part of the Reno–Sparks metropolitan area. The Las Vegas Valley is home to the Vegas Golden Knights of the National Hockey League who began to play in the 2017–18 NHL season at T-Mobile Arena on the Las Vegas Strip in Paradise, the Las Vegas Raiders of the National Football League who began play at Allegiant Stadium in Paradise in 2020 after moving from Oakland, California, and the Las Vegas Aces of the WNBA who began playing in 2018 at Mandalay Bay Events Center after relocating from San Antonio. The Oakland Athletics of Major League Baseball plan to move to Las Vegas by 2027. Nevada takes pride in college sports, most notably its college football. College teams in the state include the Nevada Wolf Pack (representing the University of Nevada, Reno) and the UNLV Rebels (representing the University of Nevada, Las Vegas), both in the Mountain West Conference (MW). UNLV is most remembered for its men's basketball program, which experienced its height of supremacy in the late 1980s and early 1990s. Coached by Jerry Tarkanian, the Runnin' Rebels became one of the most elite programs in the country. In 1990, UNLV won the Men's Division I Championship by defeating Duke 103–73, which set tournament records for most points scored by a team and largest margin of victory in the national title game. In 1991, UNLV finished the regular season undefeated, a feat that would not be matched in Division I men's basketball for more than 20 years. Forward Larry Johnson won several awards, including the Naismith Award. UNLV reached the Final Four yet again, but lost their national semifinal against Duke 79–77. The Runnin' Rebels were the Associated Press pre-season No. 1 back to back (1989–90, 1990–91). North Carolina is the only other team to accomplish that (2007–08, 2008–09). The state's involvement in major-college sports is not limited to its local schools. In the 21st century, the Las Vegas area has become a significant regional center for college basketball conference tournaments. The MW, West Coast Conference, and Western Athletic Conference all hold their men's and women's tournaments in the area, and the Pac-12 holds its men's tournament there as well. The Big Sky Conference, after decades of holding its men's and women's conference tournaments at campus sites, began holding both tournaments in Reno in 2016. Las Vegas has hosted several professional boxing matches, most recently at the MGM Grand Garden Arena with bouts such as Mike Tyson vs. Evander Holyfield, Evander Holyfield vs. Mike Tyson II, Oscar De La Hoya vs. Floyd Mayweather Jr. and Oscar De La Hoya vs. Manny Pacquiao and at the newer T-Mobile Arena with Canelo Álvarez vs. Amir Khan. Along with significant rises in popularity in mixed martial arts (MMA), a number of fight leagues such as the UFC have taken interest in Las Vegas as a primary event location due to the number of suitable host venues. The Mandalay Bay Events Center and MGM Grand Garden Arena are among some of the more popular venues for fighting events such as MMA and have hosted several UFC and other MMA title fights. The city has held the most UFC events with 86 events. The state is also home to the Las Vegas Motor Speedway, which hosts NASCAR's Pennzoil 400 and South Point 400. Two venues in the immediate Las Vegas area host major annual events in rodeo. The Thomas & Mack Center, built for UNLV men's basketball, hosts the National Finals Rodeo. The PBR World Finals, operated by the bull riding-only Professional Bull Riders, was also held at the Thomas & Mack Center before moving to T-Mobile Arena in 2016. The state is also home to famous tennis player, Andre Agassi, and current baseball superstar Bryce Harper. Military Several United States Navy ships have been named USS Nevada in honor of the state. They include: Area 51 is near Groom Lake, a dry salt lake bed. The much smaller Creech Air Force Base is in Indian Springs, Nevada; Hawthorne Army Depot in Hawthorne; the Tonopah Test Range near Tonopah; and Nellis AFB in the northeast part of the Las Vegas Valley. Naval Air Station Fallon in Fallon; NSAWC, (pronounced "EN-SOCK") in western Nevada. NSAWC consolidated three Command Centers into a single Command Structure under a flag officer on July 11, 1996. The Naval Strike Warfare Center based at NAS Fallon since 1984, was joined with the Navy Fighter Weapons School (TOPGUN) and the Carrier Airborne Early Warning Weapons School, which both moved from NAS Miramar as a result of a Base Realignment and Closure decision in 1993 which transferred that installation back to the Marine Corps as MCAS Miramar. The Seahawk Weapon School was added in 1998 to provide tactical training for Navy helicopters. These bases host a number of activities including the Joint Unmanned Aerial Systems Center of Excellence, the Naval Strike and Air Warfare Center, Nevada Test and Training Range, Red Flag, the U.S. Air Force Thunderbirds, the United States Air Force Warfare Center, the United States Air Force Weapons School, and the United States Navy Fighter Weapons School. See also Notes References External links 39°N 117°W / 39°N 117°W / 39; -117 (State of Nevada) |
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Contents Bellatrix Bellatrix is the third-brightest star and a candidate binary star in the constellation of Orion, positioned 5° west of the red supergiant Betelgeuse (Alpha Orionis). It has the Bayer designation γ Orionis, which is Latinized to Gamma Orionis. With a slightly variable magnitude of around 1.6, it is typically the 25th-brightest star in the night sky. It is the closest major star in Orion at only 244.6 light-years from the Solar System. Nomenclature The traditional name Bellatrix is from the Latin bellātrix "female warrior". It first appeared in the works of Abu Ma'shar al-Balkhi and Johannes Hispalensis, where it originally referred to Capella, but was transferred to Gamma Orionis by the Vienna school of astronomers in the 15th century, and appeared in contemporary reprints of the Alfonsine tables. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included Bellatrix for this star. It is now so entered in the IAU Catalog of Star Names. The designation of Bellatrix as γ Orionis (Latinized to Gamma Orionis) was made by Johann Bayer in 1603. The "gamma" designation is commonly given to the third-brightest star in each constellation. Standard star Bellatrix has been used as both a photometric and spectral standard star, but both characteristics have been shown to be unreliable. In 1963, Bellatrix was included with a set of bright stars used to define the UBV magnitude system. These are used for comparison with other stars to check for variability, and so by definition, the apparent magnitude of Bellatrix was set to 1.64. However, when an all-sky photometry survey was carried out in 1988, this star was suspected to be variable. It was measured ranging in apparent magnitude from 1.59 to 1.64, and appears to be a low amplitude, possibly irregular variable. Physical properties The spectral types for O and early B stars were defined more rigorously in 1971 and Bellatrix was used as a standard for the B2 III type. The expected brightness of Bellatrix from this spectral type is about one magnitude brighter than calculated from its apparent magnitude and Hipparcos distance. Analysis of the observed characteristics of the star indicate that it should be a B2 main sequence star, not the giant that it appears from its spectral type. Close analysis of high resolution spectra suggest that it is a spectroscopic binary composed of two similar stars less luminous than a B2 giant. Bellatrix is a massive star with about 8.6 times the mass and 6.4 times the radius of the Sun. As a massive star, this star will evolve faster than the Sun, currently it has an estimated age of approximately 25 million years. The hydrogen should be exhausted in seven million years, after that Bellatrix will expand and cool. It may end its life in a supernova. The effective temperature of the outer envelope of this star is 22,000 K, which is considerably hotter than the 5,772 K on the Sun. This high temperature gives this star the blue-white hue that occurs with B-type stars. It shows a projected rotational velocity of around 52 km/s. Companions Bellatrix was thought to belong to the Orion OB1 association of stars that share a common motion through space, along with the stars of Orion's Belt: Alnitak (Zeta Orionis), Alnilam (Epsilon Orionis), and Mintaka (Delta Orionis). However, this is no longer believed to be the case, as Bellatrix is now known to be much closer than the rest of the group. It is not known to have a stellar companion, although researchers Maria-Fernanda Nieva and Norbert Przybilla raised the possibility it might be a spectroscopic binary. A 2011 search for nearby companions failed to conclusively find any objects that share a proper motion with Bellatrix. Three nearby candidates were all found to be background stars. Some researchers suspected that Bellatrix was a member of the 32 Orionis group. They proposed that the 32 Ori group should instead be termed the Bellatrix Cluster on the basis that the sky position and distance of Bellatrix are similar to those of the 32 Ori group. The proper motion of Bellatrix deviates significantly from the mean motion of the group, leaving its membership in question. However, it may be possible to reconcile membership if the divergent velocity is the result of an unseen companion. For example, a face-on orbit with a black hole companion orbiting ~100 AU from the star with a period measured in centuries could account for the discrepancy. Etymology and cultural significance Bellatrix was also called the Amazon Star, which Richard Hinckley Allen proposed came from a loose translation of the Arabic name Al Najīd, the Conqueror. A c.1275 Arabic celestial globe records the name as المرزم "the lion". Bellatrix is one of the four navigational stars in Orion that are used for celestial navigation. In the 17th century catalogue of stars in the Calendarium of Al Achsasi al Mouakket, this star was designated Menkib al Jauza al Aisr, which was translated into Latin as Humerus Sinister Gigantis (The Left Shoulder of the Giant). The Wardaman people of northern Australia know Bellatrix as Banjan, the sparkling pigment used in ceremonies conducted by Rigel the Red Kangaroo Leader in a songline when Orion is high in the sky. The other stars of Orion are his ceremonial tools and entourage. Betelgeuse is Ya-jungin "Owl Eyes Flicking", watching the ceremonies. To the Inuit, the appearance of Betelgeuse and Bellatrix high in the southern sky after sunset marked the beginning of spring and lengthening days in late February and early March. The two stars were known as Akuttujuuk "those (two) placed far apart", referring to the distance between them, mainly to people from North Baffin Island and Melville Peninsula. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Python_(programming_language)#cite_note-29] | [TOKENS: 4314] |
Contents Python (programming language) Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured (particularly procedural), object-oriented and functional programming. Guido van Rossum began working on Python in the late 1980s as a successor to the ABC programming language. Python 3.0, released in 2008, was a major revision and not completely backward-compatible with earlier versions. Beginning with Python 3.5, capabilities and keywords for typing were added to the language, allowing optional static typing. As of 2026[update], the Python Software Foundation supports Python 3.10, 3.11, 3.12, 3.13, and 3.14, following the project's annual release cycle and five-year support policy. Python 3.15 is currently in the alpha development phase, and the stable release is expected to come out in October 2026. Earlier versions in the 3.x series have reached end-of-life and no longer receive security updates. Python has gained widespread use in the machine learning community. It is widely taught as an introductory programming language. Since 2003, Python has consistently ranked in the top ten of the most popular programming languages in the TIOBE Programming Community Index, which ranks based on searches in 24 platforms. History Python was conceived in the late 1980s by Guido van Rossum at Centrum Wiskunde & Informatica (CWI) in the Netherlands. It was designed as a successor to the ABC programming language, which was inspired by SETL, capable of exception handling and interfacing with the Amoeba operating system. Python implementation began in December 1989. Van Rossum first released it in 1991 as Python 0.9.0. Van Rossum assumed sole responsibility for the project, as the lead developer, until 12 July 2018, when he announced his "permanent vacation" from responsibilities as Python's "benevolent dictator for life" (BDFL); this title was bestowed on him by the Python community to reflect his long-term commitment as the project's chief decision-maker. (He has since come out of retirement and is self-titled "BDFL-emeritus".) In January 2019, active Python core developers elected a five-member Steering Council to lead the project. The name Python derives from the British comedy series Monty Python's Flying Circus. (See § Naming.) Python 2.0 was released on 16 October 2000, featuring many new features such as list comprehensions, cycle-detecting garbage collection, reference counting, and Unicode support. Python 2.7's end-of-life was initially set for 2015, and then postponed to 2020 out of concern that a large body of existing code could not easily be forward-ported to Python 3. It no longer receives security patches or updates. While Python 2.7 and older versions are officially unsupported, a different unofficial Python implementation, PyPy, continues to support Python 2, i.e., "2.7.18+" (plus 3.11), with the plus signifying (at least some) "backported security updates". Python 3.0 was released on 3 December 2008, and was a major revision and not completely backward-compatible with earlier versions, with some new semantics and changed syntax. Python 2.7.18, released in 2020, was the last release of Python 2. Several releases in the Python 3.x series have added new syntax to the language, and made a few (considered very minor) backward-incompatible changes. As of January 2026[update], Python 3.14.3 is the latest stable release. All older 3.x versions had a security update down to Python 3.9.24 then again with 3.9.25, the final version in 3.9 series. Python 3.10 is, since November 2025, the oldest supported branch. Python 3.15 has an alpha released, and Android has an official downloadable executable available for Python 3.14. Releases receive two years of full support followed by three years of security support. Design philosophy and features Python is a multi-paradigm programming language. Object-oriented programming and structured programming are fully supported, and many of their features support functional programming and aspect-oriented programming – including metaprogramming and metaobjects. Many other paradigms are supported via extensions, including design by contract and logic programming. Python is often referred to as a 'glue language' because it is purposely designed to be able to integrate components written in other languages. Python uses dynamic typing and a combination of reference counting and a cycle-detecting garbage collector for memory management. It uses dynamic name resolution (late binding), which binds method and variable names during program execution. Python's design offers some support for functional programming in the "Lisp tradition". It has filter, map, and reduce functions; list comprehensions, dictionaries, sets, and generator expressions. The standard library has two modules (itertools and functools) that implement functional tools borrowed from Haskell and Standard ML. Python's core philosophy is summarized in the Zen of Python (PEP 20) written by Tim Peters, which includes aphorisms such as these: However, Python has received criticism for violating these principles and adding unnecessary language bloat. Responses to these criticisms note that the Zen of Python is a guideline rather than a rule. The addition of some new features had been controversial: Guido van Rossum resigned as Benevolent Dictator for Life after conflict about adding the assignment expression operator in Python 3.8. Nevertheless, rather than building all functionality into its core, Python was designed to be highly extensible via modules. This compact modularity has made it particularly popular as a means of adding programmable interfaces to existing applications. Van Rossum's vision of a small core language with a large standard library and easily extensible interpreter stemmed from his frustrations with ABC, which represented the opposite approach. Python claims to strive for a simpler, less-cluttered syntax and grammar, while giving developers a choice in their coding methodology. Python lacks do .. while loops, which Rossum considered harmful. In contrast to Perl's motto "there is more than one way to do it", Python advocates an approach where "there should be one – and preferably only one – obvious way to do it". In practice, however, Python provides many ways to achieve a given goal. There are at least three ways to format a string literal, with no certainty as to which one a programmer should use. Alex Martelli is a Fellow at the Python Software Foundation and Python book author; he wrote that "To describe something as 'clever' is not considered a compliment in the Python culture." Python's developers typically prioritize readability over performance. For example, they reject patches to non-critical parts of the CPython reference implementation that would offer increases in speed that do not justify the cost of clarity and readability.[failed verification] Execution speed can be improved by moving speed-critical functions to extension modules written in languages such as C, or by using a just-in-time compiler like PyPy. Also, it is possible to transpile to other languages. However, this approach either fails to achieve the expected speed-up, since Python is a very dynamic language, or only a restricted subset of Python is compiled (with potential minor semantic changes). Python is meant to be a fun language to use. This goal is reflected in the name – a tribute to the British comedy group Monty Python – and in playful approaches to some tutorials and reference materials. For instance, some code examples use the terms "spam" and "eggs" (in reference to a Monty Python sketch), rather than the typical terms "foo" and "bar". A common neologism in the Python community is pythonic, which has a broad range of meanings related to program style: Pythonic code may use Python idioms well; be natural or show fluency in the language; or conform with Python's minimalist philosophy and emphasis on readability. Syntax and semantics Python is meant to be an easily readable language. Its formatting is visually uncluttered and often uses English keywords where other languages use punctuation. Unlike many other languages, it does not use curly brackets to delimit blocks, and semicolons after statements are allowed but rarely used. It has fewer syntactic exceptions and special cases than C or Pascal. Python uses whitespace indentation, rather than curly brackets or keywords, to delimit blocks. An increase in indentation comes after certain statements; a decrease in indentation signifies the end of the current block. Thus, the program's visual structure accurately represents its semantic structure. This feature is sometimes termed the off-side rule. Some other languages use indentation this way; but in most, indentation has no semantic meaning. The recommended indent size is four spaces. Python's statements include the following: The assignment statement (=) binds a name as a reference to a separate, dynamically allocated object. Variables may subsequently be rebound at any time to any object. In Python, a variable name is a generic reference holder without a fixed data type; however, it always refers to some object with a type. This is called dynamic typing—in contrast to statically-typed languages, where each variable may contain only a value of a certain type. Python does not support tail call optimization or first-class continuations; according to Van Rossum, the language never will. However, better support for coroutine-like functionality is provided by extending Python's generators. Before 2.5, generators were lazy iterators; data was passed unidirectionally out of the generator. From Python 2.5 on, it is possible to pass data back into a generator function; and from version 3.3, data can be passed through multiple stack levels. Python's expressions include the following: In Python, a distinction between expressions and statements is rigidly enforced, in contrast to languages such as Common Lisp, Scheme, or Ruby. This distinction leads to duplicating some functionality, for example: A statement cannot be part of an expression; because of this restriction, expressions such as list and dict comprehensions (and lambda expressions) cannot contain statements. As a particular case, an assignment statement such as a = 1 cannot be part of the conditional expression of a conditional statement. Python uses duck typing, and it has typed objects but untyped variable names. Type constraints are not checked at definition time; rather, operations on an object may fail at usage time, indicating that the object is not of an appropriate type. Despite being dynamically typed, Python is strongly typed, forbidding operations that are poorly defined (e.g., adding a number and a string) rather than quietly attempting to interpret them. Python allows programmers to define their own types using classes, most often for object-oriented programming. New instances of classes are constructed by calling the class, for example, SpamClass() or EggsClass()); the classes are instances of the metaclass type (which is an instance of itself), thereby allowing metaprogramming and reflection. Before version 3.0, Python had two kinds of classes, both using the same syntax: old-style and new-style. Current Python versions support the semantics of only the new style. Python supports optional type annotations. These annotations are not enforced by the language, but may be used by external tools such as mypy to catch errors. Python includes a module typing including several type names for type annotations. Also, mypy supports a Python compiler called mypyc, which leverages type annotations for optimization. 1.33333 frozenset() Python includes conventional symbols for arithmetic operators (+, -, *, /), the floor-division operator //, and the modulo operator %. (With the modulo operator, a remainder can be negative, e.g., 4 % -3 == -2.) Also, Python offers the ** symbol for exponentiation, e.g. 5**3 == 125 and 9**0.5 == 3.0. Also, it offers the matrix‑multiplication operator @ . These operators work as in traditional mathematics; with the same precedence rules, the infix operators + and - can also be unary, to represent positive and negative numbers respectively. Division between integers produces floating-point results. The behavior of division has changed significantly over time: In Python terms, the / operator represents true division (or simply division), while the // operator represents floor division. Before version 3.0, the / operator represents classic division. Rounding towards negative infinity, though a different method than in most languages, adds consistency to Python. For instance, this rounding implies that the equation (a + b)//b == a//b + 1 is always true. Also, the rounding implies that the equation b*(a//b) + a%b == a is valid for both positive and negative values of a. As expected, the result of a%b lies in the half-open interval [0, b), where b is a positive integer; however, maintaining the validity of the equation requires that the result must lie in the interval (b, 0] when b is negative. Python provides a round function for rounding a float to the nearest integer. For tie-breaking, Python 3 uses the round to even method: round(1.5) and round(2.5) both produce 2. Python versions before 3 used the round-away-from-zero method: round(0.5) is 1.0, and round(-0.5) is −1.0. Python allows Boolean expressions that contain multiple equality relations to be consistent with general usage in mathematics. For example, the expression a < b < c tests whether a is less than b and b is less than c. C-derived languages interpret this expression differently: in C, the expression would first evaluate a < b, resulting in 0 or 1, and that result would then be compared with c. Python uses arbitrary-precision arithmetic for all integer operations. The Decimal type/class in the decimal module provides decimal floating-point numbers to a pre-defined arbitrary precision with several rounding modes. The Fraction class in the fractions module provides arbitrary precision for rational numbers. Due to Python's extensive mathematics library and the third-party library NumPy, the language is frequently used for scientific scripting in tasks such as numerical data processing and manipulation. Functions are created in Python by using the def keyword. A function is defined similarly to how it is called, by first providing the function name and then the required parameters. Here is an example of a function that prints its inputs: To assign a default value to a function parameter in case no actual value is provided at run time, variable-definition syntax can be used inside the function header. Code examples "Hello, World!" program: Program to calculate the factorial of a non-negative integer: Libraries Python's large standard library is commonly cited as one of its greatest strengths. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. The language includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals, manipulating regular expressions, and unit testing. Some parts of the standard library are covered by specifications—for example, the Web Server Gateway Interface (WSGI) implementation wsgiref follows PEP 333—but most parts are specified by their code, internal documentation, and test suites. However, because most of the standard library is cross-platform Python code, only a few modules must be altered or rewritten for variant implementations. As of 13 March 2025,[update] the Python Package Index (PyPI), the official repository for third-party Python software, contains over 614,339 packages. Development environments Most[which?] Python implementations (including CPython) include a read–eval–print loop (REPL); this permits the environment to function as a command line interpreter, with which users enter statements sequentially and receive results immediately. Also, CPython is bundled with an integrated development environment (IDE) called IDLE, which is oriented toward beginners.[citation needed] Other shells, including IDLE and IPython, add additional capabilities such as improved auto-completion, session-state retention, and syntax highlighting. Standard desktop IDEs include PyCharm, Spyder, and Visual Studio Code; there are web browser-based IDEs, such as the following environments: Implementations CPython is the reference implementation of Python. This implementation is written in C, meeting the C11 standard since version 3.11. Older versions use the C89 standard with several select C99 features, but third-party extensions are not limited to older C versions—e.g., they can be implemented using C11 or C++. CPython compiles Python programs into an intermediate bytecode, which is then executed by a virtual machine. CPython is distributed with a large standard library written in a combination of C and native Python. CPython is available for many platforms, including Windows and most modern Unix-like systems, including macOS (and Apple M1 Macs, since Python 3.9.1, using an experimental installer). Starting with Python 3.9, the Python installer intentionally fails to install on Windows 7 and 8; Windows XP was supported until Python 3.5, with unofficial support for VMS. Platform portability was one of Python's earliest priorities. During development of Python 1 and 2, even OS/2 and Solaris were supported; since that time, support has been dropped for many platforms. All current Python versions (since 3.7) support only operating systems that feature multithreading, by now supporting not nearly as many operating systems (dropping many outdated) than in the past. All alternative implementations have at least slightly different semantics. For example, an alternative may include unordered dictionaries, in contrast to other current Python versions. As another example in the larger Python ecosystem, PyPy does not support the full C Python API. Creating an executable with Python often is done by bundling an entire Python interpreter into the executable, which causes binary sizes to be massive for small programs, yet there exist implementations that are capable of truly compiling Python. Alternative implementations include the following: Stackless Python is a significant fork of CPython that implements microthreads. This implementation uses the call stack differently, thus allowing massively concurrent programs. PyPy also offers a stackless version. Just-in-time Python compilers have been developed, but are now unsupported: There are several compilers/transpilers to high-level object languages; the source language is unrestricted Python, a subset of Python, or a language similar to Python: There are also specialized compilers: Some older projects existed, as well as compilers not designed for use with Python 3.x and related syntax: A performance comparison among various Python implementations, using a non-numerical (combinatorial) workload, was presented at EuroSciPy '13. In addition, Python's performance relative to other programming languages is benchmarked by The Computer Language Benchmarks Game. There are several approaches to optimizing Python performance, despite the inherent slowness of an interpreted language. These approaches include the following strategies or tools: Language Development Python's development is conducted mostly through the Python Enhancement Proposal (PEP) process; this process is the primary mechanism for proposing major new features, collecting community input on issues, and documenting Python design decisions. Python coding style is covered in PEP 8. Outstanding PEPs are reviewed and commented on by the Python community and the steering council. Enhancement of the language corresponds with development of the CPython reference implementation. The mailing list python-dev is the primary forum for the language's development. Specific issues were originally discussed in the Roundup bug tracker hosted by the foundation. In 2022, all issues and discussions were migrated to GitHub. Development originally took place on a self-hosted source-code repository running Mercurial, until Python moved to GitHub in January 2017. CPython's public releases have three types, distinguished by which part of the version number is incremented: Many alpha, beta, and release-candidates are also released as previews and for testing before final releases. Although there is a rough schedule for releases, they are often delayed if the code is not ready yet. Python's development team monitors the state of the code by running a large unit test suite during development. The major academic conference on Python is PyCon. Also, there are special Python mentoring programs, such as PyLadies. Naming Python's name is inspired by the British comedy group Monty Python, whom Python creator Guido van Rossum enjoyed while developing the language. Monty Python references appear frequently in Python code and culture; for example, the metasyntactic variables often used in Python literature are spam and eggs, rather than the traditional foo and bar. Also, the official Python documentation contains various references to Monty Python routines. Python users are sometimes referred to as "Pythonistas". Languages influenced by Python See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Benefit_corporation] | [TOKENS: 2762] |
Contents Benefit corporation In business, particularly in United States corporate law, a benefit corporation (or in some states, a public benefit corporation) is a type of for-profit corporate entity whose goals include making a positive impact on society. Laws concerning conventional corporations typically do not define the "best interest of society", which has led to the belief that increasing shareholder value (profits and/or share price) is the only overarching or compelling interest of a corporation. Benefit corporations explicitly specify that profit is not their only goal. An ordinary corporation may change to a benefit corporation merely by stating in its approved corporate bylaws that it is a benefit corporation. A company chooses to become a benefit corporation in order to operate as a traditional for-profit business while simultaneously addressing social, economic, and/or environmental needs. For example, a 2013 study done by MBA students at the University of Maryland showed that one main reason businesses in Maryland had chosen to file as benefit corporations was for community recognition of their values. A benefit corporation's directors and officers operate the business with the same authority and behavior as in a traditional corporation, but are required to consider the impact of their decisions not only on shareholders but also on employees, customers, the community, and the local and global environment. For an example of what additional impacts directors and officers are required to consider, view the Maryland Code § 5-6C-07 – Duties of director. The nature of the business conducted by the corporation does not affect its status as a benefit corporation. Instead, it provides a justification for including public benefits in their missions and activities. The benefit corporation legislation ensures that a director is required to consider other public benefits in addition to profit, preventing shareholders from using a drop in stock value as evidence for dismissal or a lawsuit against the corporation. Transparency provisions require benefit corporations to publish annual benefit reports of their social and environmental performance using a comprehensive, credible, independent, and transparent third-party standard. However, few of the states have included provisions for the removal of benefit corporation status or fines if the companies fail to publish benefit reports that comply with the state statutes. Although approximately 36 jurisdictions now authorize the creation of benefit corporations, outside of those jurisdictions there are no legal standards that define what constitutes a benefit corporation. With jurisdictions that recognize this form of business, a benefit corporation is intended "to merge the traditional for-profit business corporation model with a non-profit model by allowing social entrepreneurs to consider interests beyond those of maximizing shareholder wealth." In jurisdictions where regulations have not been enacted, a benefit corporation need not be certified or audited by the third-party standard. Instead, it may use third-party standards solely as a rubric to measure its own performance. Some research suggests a possible synergy between a benefit corporation and employee ownership. History In April 2010, Maryland became the first U.S. state to pass benefit corporation legislation. As of March 2018[update], 36 states and Washington, D.C., have passed legislation allowing for the creation of benefit corporations: and enhance corporate responsibility. Connecticut's benefit corporation law is the first to allow "preservation clauses", which allow the corporation's founders to prevent it from reverting to a 'For Profit' entity at the will of their shareholders. A subset of benefit corporation, the public benefit LLC, allows for limited liability companies the same opportunities afforded to corporations under a state's benefit corporation law. Similar bills have been introduced in Connecticut and Illinois. Some states have passed legislation for creating social purpose corporations (SPCs), which are more flexible in their legal requirements and responsibilities compared to benefit corporations. Low-profit limited liability companies (L3Cs) were created to comply with the Internal Revenue Service (IRS) program-related investments (PRIs) rules (26 U.S.C. § 170(c)(2)(B)) which allow most typically private foundations the ability to maintain tax-exempt status through investments in qualifying businesses and/or charities. They blend aspects of law regarding limited liability companies with aspects of non-profit law, but remain for-profit companies for tax purposes. In May 2018, the leader of the British Columbia Green Party introduced a bill to amend the Business Corporations Act to permit the incorporation of "benefit companies" in British Columbia. On June 30, 2020, British Columbia became the first province in Canada to offer the option of incorporating as a benefit company. In 2018, Colombia introduced benefit corporation legislation. Israeli law defines a public benefit company in chapter 9 of its Companies Law, with the current definition stemming from a 2007 amendment. Public benefit companies may only draw their stated goals from a closed list codified in law, and are prohibited from distributing dividends. In December 2015, the Italian Parliament passed legislation recognizing a new kind of organization, named Società Benefit, which was directly modeled after benefit corporations in the United States. In the United Kingdom, Community Interest Companies (CIC) were introduced in 2005, intended "for people wishing to establish businesses which trade with a social purpose..., or to carry on other activities for the benefit of the community". Differences from traditional corporations Historically, U.S. corporate law has not been structured or tailored to address the situation of for-profit companies that wish to pursue a social or environmental mission. While corporations generally have the ability to pursue a broad range of activities, corporate decision-making is usually justified in terms of creating long-term shareholder value. The idea that a corporation has as its purpose to maximize financial gain for its shareholders was first articulated in Dodge v. Ford Motor Co. in 1919. Over time, through both law and custom, the concept of "shareholder primacy" has come to be widely accepted. This was reaffirmed in 2010 for Delaware corporations by the case eBay Domestic Holdings, Inc. v. Craig Newmark, et al., 3705-CC, 61 (Del. Ch. 2010)., in which the Delaware Chancery Court stated that a non-financial mission that "seeks not to maximize the economic value of a for-profit Delaware corporation for the benefit of its stockholders" is inconsistent with directors' fiduciary duties. However, the fiduciary duties do not list profit or financial gains specifically, and to date no corporate charters have been written that identify profit as one of those duties. In the ordinary course of business, decisions made by a corporation's directors are generally protected by the business judgment rule, under which courts are reluctant to second-guess operating decisions made by directors. In a takeover or change of control situation, however, courts give less deference to directors' decisions and require that directors obtain the highest price in order to maximize shareholder value in the transaction. Thus a corporation may be unable to maintain its focus on social and environmental factors in a change of control situation because of the pressure to maximize shareholder value. Mission-driven businesses, impact investors, and social entrepreneurs are constrained by this legal framework, which is not equipped to accommodate for-profit entities whose mission is central to their existence. Even in states that have passed "constituency" statutes, which permit directors and officers of ordinary corporations to consider non-financial interests when making decisions, legal uncertainties make it difficult for mission-driven businesses to know when they are allowed to consider additional interests. Without clear case law, directors may still fear civil claims if they stray from their fiduciary duties to the owners of the business to maximize profit. By contrast, benefit corporations expand the fiduciary duty of directors to require them to consider non-financial stakeholders as well as the interests of shareholders. This gives directors and officers of mission-driven businesses the legal protection to pursue an additional mission and consider additional stakeholders. The enacting state's benefit corporation statutes are placed within existing state corporation codes so that the codes apply to benefit corporations in every respect except those explicit provisions unique to the benefit corporation form. Provisions Typical major provisions of a benefit corporation are: Purpose Accountability Transparency Right of action Change of control/purpose/structure Benefit corporations are treated like all other corporations for tax purposes. Benefits Benefit corporation laws address concerns held by entrepreneurs who wish to raise growth capital but fear losing control of the social or environmental mission of their business. In addition, the laws provide companies the ability to consider factors other than the highest purchase offer at the time of sale, in spite of the ruling on Revlon, Inc. v. MacAndrews & Forbes Holdings, Inc. Chartering as a benefit corporation also allows companies to distinguish themselves as businesses with a social conscience, and as one that aspires to a standard they consider higher than profit-maximization for shareholders. Yvon Chouinard, founder of Patagonia, has written "Benefit corporation legislation creates the legal framework to enable companies like Patagonia to stay mission-driven through succession, capital raises, and even changes in ownership, by institutionalizing the values, culture, processes, and high standards put in place by founding entrepreneurs." Oregon House Bill 3572, signed by the governor of Oregon in July 2023, allows public contracting agencies to award contracts to benefit corporations if the cost of the goods and services is not more than 5% higher than that available from another company. Benefit corporation vs. certified benefit corporation There is a difference between being filing as a benefit corporation in a state, and being a certified benefit corporation also known as a B Corporation. B Corporations voluntarily promise to run their firm with social and environmental causes as a concern. To receive their certification from B Lab they must score a minimum of 80 out of 200 on a survey called the B impact assessment. Next, they will have to pass through an audit process. Finally, the firms wishing to remain certified will be required to pay an annual fee to B Lab. Furthermore, companies will pledge to incorporate as a benefit corporation before their re-certification. Benefit corporations and cooperatives Benefit corporations are not synonymous with cooperatives, which are a type of corporate governance in which the governance and shares are equally held by their members, such as all employees or all consumers. However, a benefit corporation may also be organized as a cooperative or vice versa. Taxation A public benefit corporation is a legal entity that is organized and taxed as either an S corporation or C corporation. An S or C corporation will not change its tax status upon transferring to a public benefit corporation, while an LLC, partnership or sole proprietorship will have to. While public benefit corporations are taxed the same as their underlying corporation status, there is added benefit to taxation on charitable contributions. If a firm makes donations to a qualifying non-profit, the charitable contributions receive a tax-deductible status. This will lower a firm's taxes compared to a typical C-corporation that is not donating money and only focusing on short term profits. Possible incentives to change to a benefit corporation Reorganizing as a public benefit corporation affords a corporation's directors and founders protection from shareholder lawsuits when pursuing decisions that benefit the public at the expense of short-term profits. Furthermore, firms that transition typically experience advantages in retaining employees, increasing their customer loyalty and attracting prospective talent that will mesh well into the company culture. Transition process Changing status to a public benefit corporation requires several steps. First, the firm should choose one or more specific public benefit projects that it will pursue. Next, the articles of incorporation should be amended to state at the beginning that the firm is a public benefit corporation. The term public benefit corporation (PBC) or another abbreviation may be added to the entity's name if the founders choose. Finally the share certificates that are issued by the entity should state that the firm is a public benefit corporation. A shareholder vote is required to amend the articles which must include "non-voting" shares. The vote must gain a two-thirds majority to pass, depending on the Articles of Incorporation. Shareholders should be notified early that dissenter's rights apply. Dissenter's rights mean that those that vote against the amendment and qualify, may require the company to buy back their shares at fair value before the change. Firms making the transition should also perform a "due diligence review" of their business contracts, affairs and status in order to avoid any unforeseen liability associated with changing the form of the entity. The transition process is different state by state but for Colorado it is as follows. First, the firm must prepare the aforementioned amended articles. Then, they also amend their bylaws and assign responsibilities to the board of directors. Next, the amendments must be approved by the directors before going to a shareholder vote. Finally they file the amended articles of incorporation with the secretary of the state. If the prior entity is an LLC or partnership there is an extra step required. For these entities the articles of incorporation themselves and the related bylaws must first be prepared and filed with the state secretary. Only then will it be possible to merge or transition the previous form into the benefit corporation. Investor and consumer preferences According to William Mitchell Law Review journal, about 68 million US customers have a preference for making decisions about their purchases based on a sense of environmental or social responsibility. Some individuals even go as far as using their purchases to "punish" companies for bad corporate behavior when it pertains to environmental or social cause. Others do the opposite, and use their purchasing power to reward firms that they believe are doing social or environmental good. The Mitchell Law Review also states that around 49% of Americans have at some point in time boycotted firms whose behavior they see as "not in the best interest of society." Recent research also suggests that when variables like price and quality are held constant, 87% of customers would switch from a less socially responsible brand to a more socially responsible competitor. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Escape_velocity] | [TOKENS: 3178] |
Contents Escape velocity In celestial mechanics, escape velocity or escape speed is the minimum speed needed for an object to escape from contact with or orbit of a primary body, assuming: Although the term escape velocity is common, it is more accurately described as a speed than as a velocity because it is independent of direction. Because gravitational force between two objects depends on their combined mass, the escape speed also depends on mass. For artificial satellites and small natural objects, the mass of the object makes a negligible contribution to the combined mass, and so is often ignored. Escape speed varies with distance from the center of the primary body, as does the velocity of an object traveling under the gravitational influence of the primary. If an object is in a circular or elliptical orbit, its speed is always less than the escape speed at its current distance. In contrast if it is on a hyperbolic trajectory its speed will always be higher than the escape speed at its current distance. (It will slow down as it gets to greater distance, but do so asymptotically approaching a positive speed.) An object on a parabolic trajectory will always be traveling exactly the escape speed at its current distance. It has precisely balanced positive kinetic energy and negative gravitational potential energy;[a] it will always be slowing down, asymptotically approaching zero speed, but never quite stop. Escape velocity calculations are typically used to determine whether an object will remain in the gravitational sphere of influence of a given body. For example, in solar system exploration it is useful to know whether a probe will continue to orbit the Earth or escape to a heliocentric orbit. It is also useful to know how much a probe will need to slow down in order to be gravitationally captured by its destination body. Rockets do not have to reach escape velocity in a single maneuver, and objects can also use a gravity assist to siphon kinetic energy away from large bodies. Precise trajectory calculations require taking into account small forces like atmospheric drag, radiation pressure, and solar wind. A rocket under continuous or intermittent thrust (or an object climbing a space elevator) can attain escape at any non-zero speed, but the minimum amount of energy required to do so is always the same. Calculation Escape speed at a distance d from the center of a spherically symmetric primary body (such as a star or a planet) with mass M is given by the formula where: The value GM is called the standard gravitational parameter, or μ, and is often known more accurately than either G or M separately. When given an initial speed V greater than the escape speed ve, the object will asymptotically approach the hyperbolic excess speed v∞, satisfying the equation: For example, with the definitional value for standard gravity of 9.80665 m/s2 (32.1740 ft/s2), the escape velocity from Earth is 11.186 km/s (40,270 km/h; 25,020 mph; 36,700 ft/s). For an object of mass m {\displaystyle m} the energy required to escape a celestial body's gravitational field is GMm / r, a function of the object's mass (where r is the radius of the planet, which for Earth is 6,371 kilometres (3,959 mi), G is the gravitational constant, and M is the mass of the planet, which for Earth is M = 5.9736 × 1024 kg). A related quantity is the specific orbital energy which is essentially the sum of the kinetic and potential energy divided by the mass. An object has reached escape velocity when the specific orbital energy is greater than or equal to zero. The existence of escape velocity can be thought of as a consequence of conservation of energy and an energy field of finite depth. For an object with a given total energy, which is moving subject to conservative forces (such as a static gravity field) it is only possible for the object to reach combinations of locations and speeds which have that total energy; places which have a higher potential energy than this cannot be reached at all. Adding speed (kinetic energy) to an object expands the region of locations it can reach, until, with enough energy, everywhere to infinity becomes accessible. The formula for escape velocity can be derived from the principle of conservation of energy. For the sake of simplicity, unless stated otherwise, we assume that an object will escape the gravitational field of a uniform spherical planet by moving away from it and that the only significant force acting on the moving object is the planet's gravity. Imagine that a spaceship of mass m is initially at a distance r from the center of mass of the planet, whose mass is M, and its initial speed is equal to its escape velocity, ve. At its final state, it will be an infinite distance away from the planet, and its speed will be negligibly small. Kinetic energy K and gravitational potential energy Ug are the only types of energy that we will deal with (we will ignore the drag of the atmosphere), so by the conservation of energy, We can set Kfinal = 0 because final velocity is arbitrarily small, and Ug final = 0 because final gravitational potential energy is defined to be zero a long distance away from a planet, so The same result is obtained by a relativistic calculation, in which case the variable r represents the radial coordinate or reduced circumference of the Schwarzschild metric. Scenarios An alternative expression for the escape velocity ve particularly useful at the surface on the body is: where r is the distance between the center of the body and the point at which escape velocity is being calculated and g is the gravitational acceleration at that distance (i.e., the surface gravity). For a body with a spherically symmetric distribution of mass, the escape velocity ve from the surface is proportional to the radius assuming constant density, and proportional to the square root of the average density ρ. where K = 8 3 π G ≈ 2.364 × 10 − 5 m 1.5 ⋅ k g − 0.5 ⋅ s − 1 {\textstyle K={\sqrt {{\frac {8}{3}}\pi G}}\approx \mathrm {2.364\times 10^{-5}~m^{1.5}{\cdot }kg^{-0.5}{\cdot }s^{-1}} } . This escape velocity is relative to a non-rotating frame of reference, not relative to the moving surface of the planet or moon, as explained below. The escape velocity relative to the surface of a rotating body depends on direction in which the escaping body travels. For example, as the Earth's rotational velocity is 465 m/s at the equator, a rocket launched tangentially from the Earth's equator to the east requires an initial velocity of about 10.735 km/s relative to the moving surface at the point of launch to escape whereas a rocket launched tangentially from the Earth's equator to the west requires an initial velocity of about 11.665 km/s relative to that moving surface. The surface velocity decreases with the cosine of the geographic latitude, so space launch facilities are often located as close to the equator as feasible, e.g. the American Cape Canaveral (latitude 28°28′ N) and the French Guiana Space Centre (latitude 5°14′ N). In most situations it is impractical to achieve escape velocity almost instantly, because of the acceleration implied, and also because if there is an atmosphere, the hypersonic speeds involved (on Earth a speed of 11.2 km/s, or 40,320 km/h) would cause most objects to burn up due to aerodynamic heating or be torn apart by atmospheric drag. For an actual escape orbit, a spacecraft will accelerate steadily out of the atmosphere until it reaches the escape velocity appropriate for its altitude (which will be less than on the surface). In many cases, the spacecraft may be first placed in a parking orbit (e.g. a low Earth orbit at 160–2,000 km) and then accelerated to the escape velocity at that altitude, which will be slightly lower (about 11.0 km/s at a low Earth orbit of 200 km). The required additional change in speed, however, is far less because the spacecraft already has a significant orbital speed (in low Earth orbit speed is approximately 7.8 km/s, or 28,080 km/h). The escape velocity at a given height is 2 {\displaystyle {\sqrt {2}}} times the speed in a circular orbit at the same height, (compare this with the velocity equation in circular orbit). This corresponds to the fact that the potential energy with respect to infinity of an object in such an orbit is minus two times its kinetic energy, while to escape the sum of potential and kinetic energy needs to be at least zero. The velocity corresponding to the circular orbit is sometimes called the first cosmic velocity, whereas in this context the escape velocity is referred to as the second cosmic velocity. For a body in an elliptical orbit wishing to accelerate to an escape orbit the required speed will vary, and will be greatest at periapsis when the body is closest to the central body. However, the orbital speed of the body will also be at its highest at this point, and the change in velocity required will be at its lowest, as explained by the Oberth effect. Escape velocity can either be measured as relative to the other, central body or relative to center of mass or barycenter of the system of bodies. Thus for systems of two bodies, the term escape velocity can be ambiguous, but it is usually intended to mean the barycentric escape velocity of the less massive body. Escape velocity usually refers to the escape velocity of zero mass test particles. For zero mass test particles we have that the 'relative to the other' and the 'barycentric' escape velocities are the same, namely v e = 2 G M d {\displaystyle v_{\text{e}}={\sqrt {\frac {2GM}{d}}}} . But when we can't neglect the smaller mass (say m) we arrive at slightly different formulas. Because the system has to obey the law of conservation of momentum we see that both the larger and the smaller mass must be accelerated in the gravitational field. Relative to the center of mass the velocity of the larger mass (vp, for planet) can be expressed in terms of the velocity of the smaller mass (vr, for rocket). We get v p = − m M v r {\displaystyle v_{p}=-{\frac {m}{M}}v_{r}} . The 'barycentric' escape velocity now becomes v r = 2 G M 2 d ( M + m ) ≈ 2 G M d {\displaystyle v_{r}={\sqrt {\frac {2GM^{2}}{d(M+m)}}}\approx {\sqrt {\frac {2GM}{d}}}} , while the 'relative to the other' escape velocity becomes v r − v p = 2 G ( m + M ) d ≈ 2 G M d {\displaystyle v_{r}-v_{p}={\sqrt {\frac {2G(m+M)}{d}}}\approx {\sqrt {\frac {2GM}{d}}}} . Ignoring all factors other than the gravitational force between the body and the object, an object projected vertically at speed v from the surface of a spherical body with escape velocity ve and radius R will attain a maximum height h satisfying the equation which, solving for h results in where x = v/ve is the ratio of the original speed v to the escape velocity ve. Unlike escape velocity, the direction (vertically up) is important to achieve maximum height. Trajectory If an object attains exactly escape velocity, but is not directed straight away from the planet, then it will follow a curved path or trajectory. Although this trajectory does not form a closed shape, it can be referred to as an orbit. Assuming that gravity is the only significant force in the system, this object's speed at any point in the trajectory will be equal to the escape velocity at that point due to the conservation of energy, its total energy must always be 0, which implies that it always has escape velocity; see the derivation above. The shape of the trajectory will be a parabola whose focus is located at the center of mass of the planet. An actual escape requires a course with a trajectory that does not intersect with the planet, or its atmosphere, since this would cause the object to crash. When moving away from the source, this path is called an escape orbit. Escape orbits are known as C3 = 0 orbits. C3 is the characteristic energy, −GM/2a, where a is the semi-major axis length, which is infinite for parabolic trajectories. If the body has a velocity greater than escape velocity then its path will form a hyperbolic trajectory and it will have an excess hyperbolic velocity, equivalent to the extra energy the body has. A relatively small extra delta-v above that needed to accelerate to the escape speed can result in a relatively large speed at infinity. Some orbital manoeuvres make use of this fact. For example, at a place where escape speed is 11.2 km/s, the addition of 0.4 km/s yields a hyperbolic excess speed of 3.02 km/s: If a body in circular orbit (or at the periapsis of an elliptical orbit) accelerates along its direction of travel to escape velocity, the point of acceleration will form the periapsis of the escape trajectory. The eventual direction of travel will be at 90 degrees to the direction at the point of acceleration. If the body accelerates to beyond escape velocity the eventual direction of travel will be at a smaller angle, and indicated by one of the asymptotes of the hyperbolic trajectory it is now taking. This means the timing of the acceleration is critical if the intention is to escape in a particular direction. If the speed at periapsis is v, then the eccentricity of the trajectory is given by: This is valid for elliptical, parabolic, and hyperbolic trajectories. If the trajectory is hyperbolic or parabolic, it will asymptotically approach an angle θ {\displaystyle \theta } from the direction at periapsis, with The speed will asymptotically approach List of escape velocities In this table, the left-hand half gives the escape velocity from the visible surface (which may be gaseous as with Jupiter for example), relative to the centre of the planet or moon (that is, not relative to its moving surface). In the right-hand half, Ve refers to the speed relative to the central body (for example the sun). The last column will depend precisely where in orbit escape velocity is reached, as the orbits are not exactly circular (particularly Mercury and Pluto). Deriving escape velocity using calculus Let G be the gravitational constant and let M be the mass of the earth (or other gravitating body) and m be the mass of the escaping body or projectile. At a distance r from the centre of gravitation the body feels an attractive force The work needed to move the body over a small distance dr against this force is therefore given by The total work needed to move the body from the surface r0 of the gravitating body to infinity is then In order to do this work to reach infinity, the body's minimal kinetic energy at departure must match this work, so the escape velocity v0 satisfies which results in See also Notes References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Samaritans] | [TOKENS: 14339] |
Contents Samaritans Samaritans (/səˈmærɪtənz/; Samaritan Hebrew: ࠔࠠࠌࠝࠓࠩࠉࠌ, romanized: Šā̊merīm; Hebrew: שומרונים, romanized: Šomronim; Arabic: السامريون, romanized: as-Sāmiriyyūn), often preferring to be called Israelite Samaritans, are an ethnoreligious group originating from the Hebrews and Israelites of the ancient Near East. They are indigenous to Samaria, a historical region of ancient Israel and Judah. They are adherents of Samaritanism, an Abrahamic, monotheistic, and ethnic religion that developed alongside Judaism. According to their tradition, the Samaritans' ancestors, the Israelites, settled in Canaan in the 17th century BCE. The Samaritans claim descent from the Israelites who were not subject to the Assyrian captivity. Attributions Regarding the Samaritan Pentateuch as the unaltered Torah, the Samaritans view Judaism as a closely related faith, but claim that Judaism fundamentally alters the original Israelite religion. The most notable theological divide between Jewish and Samaritan doctrine concerns the holiest site, which the Jews believe is the Temple Mount in Jerusalem and which Samaritans identify as Mount Gerizim near modern Nablus and ancient Shechem in the Samaritan version of Deuteronomy 16:6. Both Jews and Samaritans assert that the Binding of Isaac occurred at their respective holy sites, identifying them as Moriah. Samaritans attribute their schism with the Jews to Eli, who was the penultimate Israelite shophet and a priest in Shiloh in 1 Samuel 1; in Samaritan belief, he is accused of establishing a worship site in Shiloh with himself as High Priest in opposition to the one on Mount Gerizim. Once a large community, the Samaritan population shrank significantly in the wake of the Samaritan revolts, which were brutally suppressed by the Byzantine Empire in the 6th century. Their numbers were further reduced by Christianization under the Byzantines and later by Islamization following the Arab conquest of the Levant. In the 12th century, the Jewish explorer and writer Benjamin of Tudela estimated that only around 1,900 Samaritans remained in Palestine and Syria. As of 2024,[update] the Samaritan community numbered around 900 people, split between Israel (some 460 in Holon) and the West Bank (some 380 in Kiryat Luza). The Samaritans in Kiryat Luza speak South Levantine Arabic, while those in Holon primarily speak Modern Hebrew. For liturgical purposes, they also use Samaritan Hebrew and Samaritan Aramaic, both of which are written in the Samaritan script. According to Samaritan tradition, the position of the community's leading Samaritan High Priest has continued without interruption for the last 3600 years, beginning with the Hebrew prophet Aaron. Since 2013, the 133rd Samaritan High Priest has been Aabed-El ben Asher ben Matzliach. In censuses, Israeli law classifies the Samaritans as a distinct religious community. However, Rabbinic literature rejected the Samaritans' Halakhic Jewishness because they refused to renounce their belief that Mount Gerizim was the historical holy site of the Israelites.[b] All Samaritans in both Holon and Kiryat Luza have Israeli citizenship, but those in Kiryat Luza also hold Palestinian citizenship; the latter group are not subject to mandatory conscription. Around the world, there are significant and growing numbers of communities, families, and individuals who, despite not being part of the Samaritan community, identify with and observe the tenets and traditions of the Samaritans' ethnic religion. The largest community outside the Levant, the "Shomrey HaTorah" of Brazil (generally known as "Neo-Samaritans Worldwide"), had approximately hundreds of members as of February 2020[update]. Etymology and terminology Inscriptions from the Samaritan diaspora in Delos, dating as early as 150–50 BCE, provide the "oldest known self-designation" for Samaritans, indicating that they called themselves Bene Israel (lit. 'children of Israel') in Hebrew (i.e., the literal descendants of the biblical prophet Israel, also known as Jacob, more commonly "Israelites"). In their own language, Samaritan Hebrew, the Samaritans call themselves "Israel", "B'nai Israel", and, alternatively, "Shamerim" (שַמֶרִים, 'Guardians', 'Keepers', or 'Watchers'); they call themselves in al-Sāmiriyyūn (السامريون) in Arabic. The term is cognate with the Biblical Hebrew term Šomerim, and both terms reflect a Semitic root שמר, which means "to watch" or "to guard". Historically, Samaritans were concentrated in Samaria. In Modern Hebrew, the Samaritans are called Shomronim (שומרונים, 'Samaritans'), which means "inhabitants of Samaria". In modern English, Samaritans refer to themselves as "Israelite Samaritans".[c] That the meaning of their name signifies "Guardians" (or 'Keepers' or 'Watchers') "of the Law" (Samaritan Pentateuch), rather than being a toponym referring to the inhabitants of the region of Samaria, was remarked on by a number of Christian Church Fathers, including Epiphanius of Salamis in the Panarion; Jerome and Eusebius in the Chronicon; and Origen in The Commentary on Saint John's Gospel. The historian Josephus uses several terms for the Samaritans, which he appears to use interchangeably.[d] Among them is a reference to Khuthaioi, a designation employed to denote peoples in Media and Persia putatively sent to Samaria to replace the exiled Israelite population.[e][f] These Khouthaioi were, in fact, Hellenistic Phoenicians/Sidonians. Samareis (Ancient Greek: Σαμαρεῖς) may refer to inhabitants of the region of Samaria, or of the city of that name, though some texts use it to refer specifically to Samaritans.[g] Origins The origins of the Samaritans have long been disputed between their own tradition and that of the Jews. Ancestrally, Samaritans affirm that they descend from the tribes of Ephraim and Manasseh in ancient Samaria. Samaritan tradition associates the split between them and the Judean-led southern Israelites to the time of the biblical priest Eli, described as a "false" high priest who usurped the priestly office from its occupant, Uzzi, and established a rival shrine at Shiloh, thereby preventing southern pilgrims from Judah and the territory of Benjamin from attending the shrine at Gerizim. Eli is also held to have created a duplicate of the Ark of the Covenant, which eventually made its way to the Judahite sanctuary in Jerusalem.[h] In contrast, Orthodox Jewish tradition—based on material found in the Hebrew Bible, Josephus's work, the Talmud, and other historiographic sources—dates their presence much later, to the beginning of the Babylonian captivity. In Rabbinic Judaism (e.g., in Tosefta Berakhot), Samaritans are called Cuthites or Cutheans (כותים, Kutim), referring to the ancient city of Kutha, geographically located in what is today Iraq. Josephus, in both the Wars of the Jews and the Antiquities of the Jews, writing of the destruction of the temple on Mount Gerizim by John Hyrcanus, also refers to the Samaritans as the Cuthaeans.[i] In the biblical account, however, Kuthah was one of several cities from which people were brought to Samaria.[j] The similarities between Samaritans and Jews were such that the rabbis of the Mishnah found it impossible to draw a clear distinction between the two groups. Attempts to date when the schism among Israelites took place—which engendered the division between Samaritans and Judaeans—vary greatly, from the time of Ezra down to the siege of Jerusalem (70 CE) and the Bar Kokhba revolt (132–136 CE). The emergence of a distinctive Samaritan identity, the outcome of a mutual estrangement between them and Jews, was something that developed over several centuries. Generally, a decisive rupture is believed to have taken place in the Hasmonean period. The Samaritan traditions of their history are contained in the Kitab al-Ta'rikh compiled by Abu'l-Fath in 1355. According to this, a text which Magnar Kartveit identifies as a "fictional" apologia drawn from earlier sources (including Josephus but perhaps also from ancient traditions) a civil war erupted among the Israelites when Eli, son of Yafni, the treasurer of the sons of Israel, sought to usurp the High Priesthood of Israel from the heirs of Phinehas. Gathering disciples and binding them by an oath of loyalty, he sacrificed on the stone altar without using salt, a rite which made High Priest Ozzi rebuke and disown him. Eli and his acolytes revolted and shifted to Shiloh, where he built an alternative temple and an altar, a replica of the original on Mount Gerizim. Eli's sons Hophni and Phinehas had intercourse with women and feasted on the meat of the sacrifice inside the Tabernacle. Thereafter, Israel was split into three factions: the original Mount Gerizim community of loyalists, the breakaway group under Eli, and heretics worshipping idols associated with Hophni and Phinehas. Judaism emerged later with those who followed the example of Eli.[k] Mount Gerizim was the original Holy Place of the Israelites from the time that Joshua conquered Canaan and the tribes of Israel settled the land. The reference to Mount Gerizim derives from the biblical story of Moses ordering Joshua to take the Twelve Tribes of Israel to the mountains by Shechem (Nablus) and place half of the tribes, six in number, on Mount Gerizim—the Mount of the Blessing—and the other half on Mount Ebal—the Mount of the Curse. According to the Hebrew Bible, they were temporarily united under a United Monarchy, but after the death of King Solomon, the kingdom split in two, the northern Kingdom of Israel with its last capital city Samaria and the southern Kingdom of Judah with its capital Jerusalem. The Deuteronomistic history, written in Judah, portrays Israel as a sinful kingdom, divinely punished for its idolatry and iniquity, and destroyed by the Neo-Assyrian Empire in 720 BCE. The tensions continued in the post-exilic period. The Books of Kings is more inclusive than Ezra–Nehemiah because the ideal is of one Israel with twelve tribes, whereas the Books of Chronicles concentrate on the Kingdom of Judah and ignore the Kingdom of Israel. Accounts of Samaritan origins in 2 Kings 17:6,24 and Chronicles, together with statements in both Ezra and Nehemiah, differ in important degrees, suppressing or highlighting narrative details according to the various intentions of their authors.[l] The narratives in Genesis about the rivalries among the 12 sons of Jacob, and other stories of brotherly discord, are viewed by historian Diklah Zohar as describing tensions between north and south, always resolving them in a symbolically favourable way for the Kingdom of Judah rather than Israel. The emergence of the Samaritans as an ethnic and religious community distinct from other Levant peoples appears to have occurred at some point after the Assyrian conquest of the Kingdom of Israel in approximately 721 BCE. The annals of Sargon II of Assyria indicate that he deported 27,290 inhabitants of the former kingdom. Jewish tradition affirms the Assyrian deportations and replacement of the previous inhabitants by forced resettlement by other peoples, but claims a different ethnic origin for the Samaritans. The Talmud mentions a people called "Cuthim" on several occasions, referring to their arrival at the hands of the Assyrians. According to 2 Kings 17:6, 24 and Josephus, the people of Israel were removed by the king of the Assyrians (Sargon II) to Halah, to Gozan on the Khabur River and to the towns of the Medes. The king of the Assyrians then brought people from Babylon, Kutha, Avva, Hamath and Sepharvaim to place in Samaria. Because God sent lions among them to kill them, the king of the Assyrians sent one of the priests from Bethel to teach the new settlers about God's ordinances. The result was that the new settlers worshipped both the God of the land and the gods of the countries they came from. In the Chronicles, following Samaria's destruction, King Hezekiah is depicted as endeavouring to draw the Ephraimites, Zebulonites, Asherites and Manassites closer to Judah. Temple repairs at the time of Josiah were financed by money from all "the remnant of Israel" in Samaria, including from Manasseh, Ephraim, and Benjamin. Jeremiah likewise speaks of people from Shechem, Shiloh, and Samaria who brought offerings of frankincense and grain to the House of YHWH. Chronicles makes no mention of an Assyrian resettlement. Yitzakh Magen argues that the version of Chronicles is perhaps closer to the historical truth and that the Assyrian settlement was unsuccessful; he asserts that a notable Israelite population remained in Samaria, part of which (following the conquest of Judah) fled south and settled there as refugees. Adam Zertal dates the Assyrian onslaught at 721 BCE to 647 BCE. From a pottery type he identifies as Mesopotamian clustering around the Menasheh lands of Samaria, he infers that there were three waves of imported settlers. Furthermore, to this day, the Samaritans claim descent from the tribe of Joseph.[m] The Encyclopaedia Judaica (under "Samaritans") summarizes both past and present views on the Samaritans' origins. It says: Until the middle of the 20th century it was customary to believe that the Samaritans originated from a mixture of the people living in Samaria and other peoples at the time of the conquest of Samaria by Assyria (722–721 BCE). The biblical account in II Kings 17 had long been the decisive source for the formulation of historical accounts of Samaritan origins. Reconsideration of this passage, however, has led to more attention being paid to the Chronicles of the Samaritans themselves. With the publication of Chronicle II (Sefer ha-Yamim), the fullest Samaritan version of their own history became available: the chronicles, and a variety of non-Samaritan materials. According to the former, the Samaritans are the direct descendants of the Joseph tribes, Ephraim and Manasseh. Until the 17th century CE, they possessed a high priesthood descending directly from Aaron through Eleazar and Phinehas. They claim to have continuously occupied their ancient territory and to have been at peace with other Israelite tribes until the time when Eli disrupted the Northern cult by moving from Shechem to Shiloh and attracting some northern Israelites to his new followers there. For the Samaritans, this was the "schism" par excellence. — "Samaritans" in Encyclopaedia Judaica, 1972, Volume 14, col. 727. Josephus, a key source, has long been considered a prejudiced witness hostile to the Samaritans.[n] He displays an ambiguous attitude, calling them both a distinct, opportunistic ethnos and, alternatively, a Jewish sect. The Dead Sea scrolls' proto-Esther fragment 4Q550c has an obscure phrase about the possibility of a Kutha(ean)(Kuti) man returning but the reference remains obscure. 4Q372 records hopes that the northern tribes will return to the land of Joseph. The current dwellers in the north are referred to as fools, an enemy people. However, they are not referred to as foreigners. It goes on to say that the Samaritans mocked Jerusalem and built a temple on a high place to provoke Israel. Contemporary scholarship confirms that deportations occurred both before and after the Assyrian conquest of the Kingdom of Israel in 722–720 BCE, with varying impacts across Galilee, Transjordan, and Samaria. During the earlier Assyrian invasions, Galilee and Transjordan experienced significant deportations, with entire tribes vanishing; the tribes of Reuben, Gad, Dan, and Naphtali are never again mentioned. Archaeological evidence from these regions shows that a large depopulation process took place there in the late 8th century BCE, with numerous sites being destroyed, abandoned, or feature a long occupation gap. In contrast, some scholars argue that Samaria—a larger and more populated area—presents a more mixed picture. While some sites were destroyed or abandoned during the Assyrian invasion, major cities such as Samaria and Megiddo remained largely intact, and other sites show a continuity of occupation. Other scholars argue that archaeological findings from Samaria show that the territory as a whole—except for a few small areas—was devastated following the Assyrian conquest. The Assyrians settled exiles from Babylonia, Elam, and Syria in places including Gezer, Hadid, and villages north of Shechem and Tirzah. However, even if the Assyrians deported 30,000 people, as they claimed, many would have remained in the area. Based on changes in material culture, Adam Zertal estimated that only 10% of the Israelite population in Samaria was deported, while the number of imported settlers was likely no more than a few thousand, indicating that most Israelites continued to reside in Samaria. Gary N. Knoppers described the demography shifts in Samaria following the Assyrian conquest as: "... not the wholesale replacement of one local population by a foreign population, but rather the diminution of the local population", which he attributed to deaths from war, disease and starvation, forced deportations, and migrations to other regions, particularly south to the Kingdom of Judah. The state-sponsored immigrants who had been forcibly brought into Samaria appear to have generally assimilated into the local population. Nevertheless, the Book of Chronicles records that King Hezekiah of Judah invited members of the tribes of Ephraim, Zebulun, Asher, Issachar and Manasseh to Jerusalem to celebrate Passover after the destruction of Israel. In light of this, it has been suggested that the bulk of those who survived the Assyrian invasions remained in the region. Per this interpretation, the Samaritan community of today is thought to be predominantly descended from those who remained. The Israeli biblical scholar Shemaryahu Talmon has supported the Samaritan tradition that they are mainly descended from the tribes of Ephraim and Manasseh who remained in Israel after the Assyrian conquest. He states that the description of them at 2 Kings 17:24 as foreigners is tendentious and intended to ostracize the Samaritans from those Israelites who returned from the Babylonian exile in 520 BCE. He further states that 2 Chronicles 30:1 could be interpreted as confirming that a large fraction of the tribes of Ephraim and Manasseh (i.e., Samaritans) remained in Israel after the Assyrian exile. E. Mary Smallwood wrote that the Samaritans "were the survivors of the pre-Exilic northern kingdom of Israel, diluted by intermarriage with alien settlers," and that they broke away from mainstream Judaism in the 4th century BCE. Archaeologist Eric Cline takes an intermediate view. He believes only 10–20% of the Israelite population (i.e. 40,000 Israelites) were deported to Assyria in 720 BCE. About 80,000 Israelites fled to Judah whilst between 100,000 and 230,000 Israelites remained in Samaria. The latter intermarried with the foreign settlers, thus forming the Samaritans. The religion of this remnant community is likely distorted by the account recorded in the Books of Kings, which claims that the local Israelite religion was perverted with the injection of foreign customs by Assyrian colonists. In reality, the surviving Samaritans continued to practice Yahwism. This explains why they did not resist Judean kings, such as Hezekiah and Josiah, imposing their religious reforms in Samaria.[citation needed] Magnar Kartveit argues that the people who later became known as Samaritans likely had diverse origins and lived in Samaria and other areas, and it was the temple project on Mount Gerizim that provided the unifying characteristic that allows them to be identified as Samaritans. Modern genetic studies support the Samaritan narrative that they descend from indigenous Israelites. Shen et al. (2004) formerly speculated that outmarriage with foreign women may have taken place. Most recently the same group came up with genetic evidence that Samaritans are closely linked to Cohanim, and therefore can be traced back to an Israelite population prior to the Assyrian invasion. This correlates with expectations from the fact that the Samaritans retained endogamous and biblical patrilineal marriage customs, and that they remained a genetically isolated population. History According to Chronicles 36:22–23, the Persian emperor Cyrus the Great (reigned 559–530 BCE) permits the return of the exiles to their homeland and orders the rebuilding of the Temple (Zion). The prophet Isaiah identifies Cyrus as "the LORD's Messiah". As the Babylonian captivity had primarily affected the lowlands of Judea, the Samarian populations had likely avoided the casualties of the crisis of exile and in fact showed signs of widespread prosperity. The books of Ezra–Nehemiah detail a lengthy political struggle between Nehemiah, governor of the new Persian province of Yehud Medinata, and Sanballat the Horonite, the governor of Samaria, centered around the refortification of the destroyed Jerusalem. Despite this political discourse, the text implies that relationships between the Jews and Samaritans were otherwise quite amicable, as intermarriage between the two seems commonplace, even to the point that the High Priest Joiada married Sanballat's daughter. Some theologians believe Nehemiah 11:3 describes other Israelite tribes returning to Judah with the Judeans. The former lived in the cities of Judah whilst the latter lived in Jerusalem. Benjamites also lived with Judeans in Jerusalem. During Achaemenid rule, material evidence suggests significant overlap between Jews and proto-Samaritans, with the two groups sharing a common language and script, eschewing the claim that the schism had taken form by this time. However, onomastic evidence suggests the existence of a distinct northern culture. Some inhabitants of Samaria during this period identified with Israelite heritage. This connection is evidenced in two ways: first, through biblical accounts of local officials' involvement with the Jerusalem Temple, and second, through naming patterns. Many names recorded in the Wadi Daliyeh documents and on Samaritan coins feature Israelite elements. Sanballat's sons bore the theophoric Israelite names Delaiah and Shelemiah, while the name "Jeroboam", used by northern Israelite kings during the monarchic period, also appears on Samaritan coins. The archaeological evidence can find no sign of habitation in the Assyrian and Babylonian periods at Mount Gerizim but indicates the existence of a sacred precinct on the site in the Persian period by the 5th century BCE. This is not to be interpreted as signaling a precipitous schism between the Jews and Samaritans, as the Gerizim temple was not the only Yahwistic temple outside of Judea. According to most modern scholars, the split between the Jews and Samaritans was a gradual historical process extending over several centuries rather than a single schism at a given point in time. The Macedonian Empire conquered the Levant in the 330s BCE, resulting in both Samaria and Judea coming under Greek rule as the province of Coele-Syria. Samaria was by-and-large devastated by the Macedonian conquest and subsequent colonization efforts, though its southern lands were spared the broader consequences of the invasion and continued to thrive. Matters were further complicated in 331 BCE when the Samaritans rose up in rebellion and murdered the Macedonian-appointed prefect Andromachus, resulting in a brutal reprisal by the army. Following the death of Alexander the Great, the area became part of the Ptolemaic Kingdom, which, in one of several wars, was eventually conquered by the neighboring Seleucid Empire. Though the temple on Mount Gerizim had existed since the 5th century BCE, evidence shows that its sacred precinct experienced an extravagant expansion during the early Hellenistic era, indicating its status as the preeminent place of Samaritan worship had begun to crystallize. By the time of Antiochus III the Great, the temple "town" had reached 30 dunams in size. The presence of a flourishing cult centered around Gerizim is documented by the sudden resurgence of Yahwistic and Hebrew names in contemporary correspondence, suggesting that the Samaritan community had officially been established by the 2nd century BCE. Overall, the Samaritans were generally more populous and wealthier than the Judeans in Palestine, until 164 BC. Antiochus IV Epiphanes was on the throne of the Seleucid Empire from 175 to 163 BCE. His policy was to Hellenize his entire kingdom and standardize religious observance. According to 1 Maccabees 1:41-50 he proclaimed himself the incarnation of the Greek god Zeus and mandated death to anyone who refused to worship him. In the 2nd century BCE, a series of events led to a revolution by a faction of Judeans against Antiochus IV. Anderson notes that during the reign of Antiochus IV:[better source needed] the Samaritan temple was renamed either Zeus Hellenios (willingly by the Samaritans according to Josephus) or, more likely, Zeus Xenios, (unwillingly in accord with 2 Macc. 6:2). — Bromiley, 4.304 Josephus quotes the Samaritans as saying: We therefore beseech thee, our benefactor and saviour, to give order to Apollonius, the governor of this part of the country, and to Nicanor, the procurator of thy affairs, to give us no disturbances, nor to lay to our charge what the Jews are accused for, since we are aliens from their nation and from their customs, but let our temple which at present hath no name at all, be named the Temple of Jupiter Hellenius. — Josephus 12:5 In the letter, defended as genuine by E. Bickerman and M. Stern, the Samaritans assert their distinction from the Judeans based on both race (γένος) and in customs (ἔθος). According to II Maccabees: Shortly afterwards, the Greek king sent Gerontes the Athenian to force the Jews of Israel to violate their ancestral customs and live no longer by the laws of God; and to profane the Temple in Jerusalem and dedicate it to Olympian Zeus, and the one on Mount Gerizim to Zeus, Patron of Strangers, as the inhabitants of the latter place had requested. — II Maccabees 6:1–2 During the Hellenistic period, Samaria was largely divided between a Hellenizing faction based in Samaria (Sebastia) and a pious faction in Shechem and surrounding rural areas, led by the High Priest. Samaria was a largely autonomous state nominally dependent on the Seleucid Empire until around 110 BCE,[o] when the Hasmonean ruler John Hyrcanus destroyed the Samaritan temple on Mount Gerizim and devastated Samaria. Only a few stone remnants of the temple exist today. Hyrcanus' campaign of destruction was the watershed moment which confirmed hostile relations between Jews and Samaritans. The actions of the Hasmonean dynasty resulted in widespread Samaritan resentment of, and alienation from, their Judean brethren, resulting in the deterioration of relations between the two that lasted centuries, if not millennia. Under the Roman Empire, Samaria became a part of the Herodian Tetrarchy, and with the deposition of Herod Archelaus in the early 1st century CE Samaria became a part of the province of Judaea. Samaritans appear briefly in the Christian gospels, most notably in the account of the Samaritan woman at the well and the parable of the Good Samaritan. In the former, it is noted that a substantial number of Samaritans accepted Jesus through the woman's testimony to them, and Jesus stayed in Samaria for two days before returning to Cana. In the latter, it is only the Samaritan who helps the man stripped of clothing, beaten, and left on the road half dead, his Abrahamic covenantal circumcision implicitly evident. A priest and a Levite walk past, but the Samaritan helps the naked man regardless of his nakedness (itself religiously offensive to the priest and Levite), his self-evident poverty, or to which Hebrew sect he belongs. During the First Jewish–Roman War in 67 CE a significant Samaritan uprising gathered on Mt. Gerizim. In response, Roman general Vespasian dispatched a relatively small force under the command of Cerialis. Although some Samaritans surrendered, most fought, resulting in heavy casualties. According to Josephus, 11,600 Samaritans were killed. There is no evidence of Samaritan involvement in later phases of the revolt. In 72/73 CE, Vespasian established Flavia Neapolis on the site of Mabartha, near Shechem. While some scholars argue this was to counter Samaritan influence and aspirations, others contend it was primarily a geo-strategic decision. The new city was designed as a polis and included both Samaritan and pagan populations, becoming a major urban center for the Samaritans. Despite its Hellenistic character, the city maintained local traditions, as reflected in its coins which avoided pagan symbols. The possibility of Samaritan involvement in the Bar Kokhba revolt (132–136 CE) alongside the Jews against the Romans remains uncertain. Some Jewish sources, such as the Genesis Rabbah and the Jerusalem Talmud, depict the Samaritans as obstructing Jewish efforts, including the construction of the Temple and the defense of Betar, leading to interpretations of possible Samaritan collaboration with the Romans. However, these sources are considered legendary or anachronistic. Additionally, later Samaritan chronicles referring to the Hadrianic period do not connect events from this time to the Bar Kokhba revolt. Consequently, Mor concludes that there is no concrete evidence of cooperation between Jews and Samaritans during the revolt. The defeat of the Jews in the Bar Kokhba revolt, along with the depopulation and destruction of Judea, allowed the Samaritans to expand into former Jewish areas, particularly in northern Judea, establishing themselves in places such as Emmaus and Sha'alavim. Samaritans also settled in the Beit She'an Valley and in coastal cities like Caesarea. In the ensuing years, the synagogue gained prominence as the central religious institution for the Samaritan community. According to later Samaritan chronicles, synagogues faced episodes of suppression during the second and third centuries CE. Under Commodus (180–192 CE) they were said to have been closed, and during the reign of an emperor called Alexander, identified either as Caracalla (211–217 CE) or Severus Alexander (222–235 CE), synagogues were reported to have been destroyed. The 4th century witnessed a Samaritan cultural revival, marked by the development of a distinct Samaritan alphabet derived from the ancient Paleo-Hebrew script, as well as the composition of new religious works. During this period, much of the liturgy was organized and formalized under the high priest Baba Rabba. Later Samaritan chronicles also credit him with the construction of synagogues in several villages, including Awarta, Salem, Namara, Qaryat Haja, Qarawa, Tira Luza, Dabarin, and Beit Jan. Samaritan chronicles also report that the high priest 'Aqbun, possibly during the reign of Emperor Valens (364–378/9 CE), rebuilt the synagogue in Nablus, which later sources say was confiscated under the Byzantines and again following the Muslim conquest. Archaeological and literary evidence indicates that by late antiquity, Samaritans established diaspora communities across the Mediterranean. In Asia Minor, Palladius recorded a Samaritan synagogue in Tarsus around 407/408 CE, while a bilingual Samaritan-Greek inscription from Thessaloniki, dated to the 4th–6th centuries CE, points to organized communal life there. In Rome, a letter of King Theoderic the Great (early 6th century) refers to a Samaritan synagogue. In Sicily, Pope Gregory I's correspondence attests to Samaritans in Syracuse at the end of the 6th century, complementing epigraphic evidence of a synagogue there from the 3rd–4th century CE. According to Samaritan sources, the Eastern Roman emperor Zeno (r. 474–491), whom they refer to as "Zait the King of Edom," persecuted the Samaritans. He is said to have travelled to Neapolis (Shechem), summoned the elders, and demanded their conversion to Christianity. When they refused, many were killed, and the local synagogue was rebuilt as a church. Zeno also appropriated Mount Gerizim, where he constructed several buildings, including a tomb for his recently deceased son. A cross was placed on the tomb so that Samaritans, in bowing before God, would also bow before it. By 484 the Samaritans rose in revolt. They attacked Neapolis, burning five churches erected on former Samaritan holy sites and mutilating Bishop Terebinthus, who was officiating at Pentecost. The rebels elected Justa (also rendered Justasa or Justasus) as their king and moved to Caesarea, where a noteworthy Samaritan community lived. There, several Christians were killed and the church of Saint Sebastian was destroyed. Justa celebrated the victory with games in the circus. According to the Chronicon Paschale, the dux Palaestinae, Asclepiades, supported by the Caesarea-based Arcadiani of Rheges, defeated the rebels, killed Justa, and sent his head to Zeno. Procopius adds that Bishop Terebinthus appealed directly to Zeno for revenge, the emperor personally went to Samaria to quell the rebellion. Some modern historians believe that the order of the facts preserved by Samaritan sources should be inverted, with the persecution of Zeno as a consequence of the rebellion rather than its cause, and should have happened after 484, around 489. Zeno rebuilt the church of St. Procopius in Neapolis, and the Samaritans were banned from Mount Gerizim, on whose top a signaling tower was built to alert in case of civil unrest. According to an anonymous biography of Mesopotamian monk Barsauma, whose pilgrimage to the region in the early 5th century was accompanied by clashes with locals and the forced conversion of non-Christians, Barsauma managed to convert Samaritans by conducting demonstrations of healing. Jacob, an ascetic healer living in a cave near Porphyrion, Mount Carmel in the 6th century CE, attracted admirers including Samaritans who later converted to Christianity. Under growing government pressure, many Samaritans who refused to convert to Christianity in the 6th century may have preferred paganism and even Manicheism. Under a charismatic, messianic figure named Julianus ben Sabar (or ben Sahir), the Samaritans of Palaestina launched a war to create their own independent state in 529. With the help of the Ghassanids, Emperor Justinian I crushed the revolt; tens of thousands of Samaritans died or were enslaved. The Samaritan faith, which had previously enjoyed the status of religio licita, was virtually outlawed thereafter by the Christian Byzantine Empire; from a population once at least in the hundreds of thousands, the Samaritan community dwindled to tens of thousands. The Byzantine response to the revolts, described by the archaeologist Claudine Dauphin as an act of ethnic cleansing, decimated five successive generations of the Samaritan population, destroyed their religious center, stripped their rights, and left them politically insignificant. Nevertheless, the Samaritan population in Samaria did survive. During a pilgrimage to the Holy Land in 570 CE, an anonymous Christian pilgrim from Piacenza travelled through Samaria and recorded the following: "From there we went up past a number of places belonging to Samaria and Judaea to the city of Sebaste, the resting-place of the Prophet Elisha. There were several Samaritan cities and villages on our way down through the plains, and wherever we passed along the streets they burned away our footprints with straw, whether we were Christians or Jews, they have such a horror of both". The same pilgrim also mentions a place called Castra Samaritanorum near Shikmona. According to Menachem Mor, the decline of the Samaritan population between the 5th and 6th centuries was mostly due to the ongoing Christianization of Palestine's inhabitants, rather than the uprisings against the Byzantines. Mor argues that a large number of Samaritans in the cities and towns converted to Christianity, some under pressure and some of their own free will. He claims that both Samaritan and Christian sources preferred to conceal this phenomenon. The Samaritans preferred to attribute their numerical decrease on their resistance to coerced conversion, while the Christians were not willing to admit that the Samaritans were coerced into accepting Christianity and instead preferred to claim that many Samaritans were killed because of their rebellious nature. A change in the local population's identity throughout the Byzantine period is not indicated by the archeological findings. By the time of the Muslim conquest of the Levant, apart from Jund Filastin, small dispersed communities of Samaritans were living in Muslim Egypt, Syria, and Muslim Iran. According to Milka Levy-Rubin, many Samaritans were forced to convert under Abbasid and Tulunid rule (878–905 CE), having been subjected to hardships such as droughts, earthquakes, persecution by local governors, high taxes on religious minorities, and anarchy. Like other non-Muslims in the empire, such as Jews, Samaritans were often considered to be People of the Book and were guaranteed religious freedom. Their minority status was protected by the Muslim rulers, and they had the right to practice their religion, but as dhimmi, adult males had to pay the jizya or "protection tax". This however changed during late Abbasid period, with increasing persecution targeting the Samaritan community and considering them infidels which must convert to Islam. Anarchy overtook Palestine during the early years of Abbasid Caliph al-Ma'mun (813–833 CE), when his rule was challenged by internal strife. According to the Chronicle of Abu l-Fath, during this time, many clashes took place, the locals suffered from famine and even fled their homes out of fear, and "many left their faith". An exceptional case is of ibn Firāsa, a rebel who arrived in Palestine in 830 and was said to have loathed Samaritans and persecuted them. He punished them, forced them to convert to Islam, and filled the prisons with Samaritan men, women, and children, keeping them there until many of them perished from hunger and thirst. He had also demanded payment for enabling them to circumcise their sons on the eighth day. As a result of the persecution, many Samaritans abandoned their religion at that time. The revolt was put down, but caliph al-Mu'tasim then increased taxes on the rebels, which sparked a second uprising. Rebel forces captured Nablus, where they set fire to synagogues belonging to the Samaritan and Dosithian (Samaritan sect) faiths. The community's situation briefly improved when this uprising was put down by Abbasid forces, and High Priest Pinhas ben Netanel resumed worship in the Nablus synagogue. Under the reign of al-Wāthiq bi-llāh, Abu-Harb Tamim, who had the support of Yaman tribes, led yet another uprising. He captured Nablus and caused many to flee, the Samaritan High Priest was injured and later died of his wounds in Hebron. The Samaritans could not go back to their homes until Abu-Harb tamim was vanquished and captured (842 CE). A number of restrictions on the dhimmi were reinstituted during the reign of the Abbasid Caliph al-Mutawakkil (847–861 CE), prices increased once more, and many people experienced severe poverty. "Many people lost faith as a result of the terrible price increases and because they became weary of paying the jizya. There were many sons and families who left their faith and became lost". The tradition of men wearing a red tarboosh may also go back to an order by al-Mutawakkil, that required non-Muslims to be distinguished from Muslims. However, this is disputed because praying while wearing a tarboosh was easier for Muslims, because they put their heads to the ground during Salah (daily prayers). The numerous instances of Samaritans converting to Islam that are mentioned in the Chronicle of Abu l-Fath are all connected to economic difficulties that led to widespread poverty among the Samaritan population, anarchy that left Samaritans defenseless against Muslim attackers, and attempts by those people and others to force conversion on the Samaritans. It is crucial to keep in mind that the Samaritan community was the smallest among the other dhimmi communities and that it was also situated in Samaria, where Muslim settlement continued to expand as evidenced by the text; by the ninth century, villages such as Sinjil and Jinsafut were already Muslim. This makes it possible to assume that the Samaritans were more vulnerable than other dhimmi, what greatly broadened the extent of their Islamization. Archaeological data demonstrates that during the 8th and 9th centuries, winepresses west of Samaria stopped operating, but the villages to which they belonged persisted. Such sites could be securely identified as Samaritan in some of those cases, and it is likely in others. According to one theory, the local Samaritans who converted to Islam kept their villages going but were barred by Islamic law from making wine. These findings date to the Abbasid period, and are in accordance with the Islamization process as described in the historical sources. As time goes on, more information from recorded sources refers to Nablus and less to the vast agricultural regions that the Samaritans had previously inhabited. Hence, the Abbasid era marks the disappearance of Samaritan rural habitation in Samaria. By the end of the period, Samaritans were mainly centered in Nablus, while other communities persisted in Caesarea, Cairo, Damascus, Aleppo, Sarepta, and Ascalon. The Samaritans transitioned from speaking Aramaic and Arabic to exclusively speaking Arabic starting from the 11th century onward. During the Crusades, the Franks took over Nablus, where the majority of Samaritans lived.[p] Massacres took place in Samaritan maritime communities in Arsuf, Caesarea, Acre and perhaps Ascalon. During the initial razzia in Nablus the invading Franks destroyed Samaritan buildings and sometime later tore down their ritual bath and synagogue on Mt. Gerizim. Christians bearing crosses successfully pleaded for a calm transition. The calamities that befell them during the Frankish reign came from Muslims such as the commander of the Dasmascene army, Bazwȃdj, who raided Nablus in 1137 and abducted 500 Samaritan men, women and children back to Damascus. Two hundred Samaritans were reportedly forced to convert to Islam in the village of Immatain by Saladin, according to a tradition recalled by a Samaritan High Priest in the 20th century; however, written sources make no reference to this event. According to the Ottoman censuses of 1525–1526, 25 Samaritan families lived in Gaza, and 29 families lived in Nablus. In 1548–1549, there were 18 families in Gaza and 34 in Nablus. In 1596–1597, there were 8 families in Gaza, 20 in Nablus and 5 in Safed. The Samaritan community in Egypt shrank as a result of Ottoman persecution of Samaritans who worked for the Mamluk government, with the majority of them converting to Islam. In Damascus, the majority of the Samaritan community was massacred or converted to Islam during the reign of the Ottoman Pasha Mardam Beqin in the early 17th century. The remainder of the Samaritan community there, in particular the Danafi family, which is still influential today, moved back to Nablus in the 17th century. The Matari family relocated from Gaza to Nablus at about the same time that the Marhiv family moved back from Sarafand, Lebanon. There were no longer any Samaritans in either Gaza or Damascus; only a handful remained in Gaza. The Nablus community endured because most of the surviving diaspora returned, and they have maintained a tiny presence there to this day. In 1624, the last Samaritan High Priest of the line of Eleazar son of Aaron died without issue, but according to Samaritan tradition, descendants of Aaron's other son, Ithamar, remained and took over the office. Following the death of High Priest Shelamia ben Pinhas, Muslim persecution of Samaritans intensified, and they became the target of violent riots that led to many of them converting to Islam. In 1624, access to Mount Gerizim's summit was outlawed for the survivors, and they were only permitted to make Passover sacrifices on the mountain's eastern slopes. By the middle of the 17th century, very small Samaritan communities survived in Nablus, Gaza, and Jaffa. The status of the Samaritan community of Nablus greatly improved in the early 18th century because one of them, Ibrahim al-Danafi, who was also a poet and an author, worked for the Tuqan family, which then dominated the city. Al-Danafi also bought the hill of Pinehas and the plot on Mount Gerizim's summit to be used by the community, but the favorable conditions that were necessary for the community's recovery did not last. The 1759 earthquake, the endemic that followed, and the other restrictions placed on the Samaritans limited the growth of their community, and by the end of the 18th century, there were only 200 people living there and living off of trade, brokerage, and tax collection. The majority of Samaritan families in the 19th century lived in Harat el-Somra, a crowded neighborhood in Nablus' southwest. During this time, the modest Samaritan synagogue, "el-Kanis", served as the center of the community's cultural, religious, and social life. Some Samaritans worked as clerks for the municipal authorities, while others worked in local small business and crafts in Nablus and its vicinity. Some were forced to collect alms from the growing numbers of tourists and other visitors. To keep their households and organizations functioning, the Samaritan community sometimes even turned to selling ancient manuscripts. During the 1840s, the ulama of Nablus began asserting that the Samaritans may not be considered "People of the Book" and therefore have the same status as pagans and must convert to Islam or be executed. As a result, locals attempted to force the conversion of two children of a Samaritan widow who had a Muslim lover in 1841. Her young daughter died from fear, but her 14-year-old boy converted to Islam. Another Samaritan was later coerced into converting to Islam. Appealing to the King of France did not help. The Samaritan people were eventually helped by the Jewish Hakham Bashi Chaim Abraham Gagin, who decreed that the Samaritans are "a branch of the children of Israel, who acknowledge the truth of the Torah," and as such should be protected as a "People of the Book". As a result, the ulama ceased their preaching against Samaritans. The Samaritans also paid bribes to the Arab Muslims, totaling approximately 1000 GBP, and eventually came out of their hiding places. However, they were prohibited from offering Passover sacrifices on Mount Gerizim until 1849. By the late Ottoman period, the Samaritan community dwindled to its lowest. In the 19th century, with pressure of conversion and persecution from the local rulers, the community fell to just over 100 persons. The situation of the Samaritan community improved significantly during the British Mandate of Palestine. At that time, they began to work in the public sector, like many other groups. With better medical care and Samaritan men marrying Jewish women, the demographic status of the community improved throughout the Mandatory period. The censuses of 1922 and 1931 recorded 163 and 182 Samaritans in Palestine, respectively. 147 lived in Nablus, 12 resided in Tulkarm, 12 in Jaffa, and 6 in As-Salt, Transjordan. Later some moved to Ramat Gan and even to Haifa. During the 1929 Palestine riots, Arab rioters attacked Samaritans who were performing the Passover sacrifice on Mount Gerizim and flung stones at them as well as their guests. The Palestine Police Force got involved and prevented any potential fatalities. After the establishment of the State of Israel, some of the Samaritans who were living in Jaffa emigrated to Samaria and lived in Nablus. By the late 1950s, around 100 Samaritans left the West Bank for Israel under an agreement with the Jordanian authorities in the West Bank. In 1954, Israeli President Yitzhak Ben-Zvi fostered a Samaritan enclave in Holon, Israel, located in 15a Ben Amram Street. During Jordanian rule in the West Bank, Samaritans from Holon were permitted to visit Mount Gerizim only once a year, on Passover. In 1967, Israel conquered the West Bank during the Six-Day War, and the Samaritans there came under Israeli rule. Until the 1990s, most of the Samaritans in the West Bank resided in Nablus. They relocated to Mount Gerizim near the Israeli settlement of Har Brakha as a result of violence during the First Intifada (1987–1990). Consequently, all that is left of the Samaritan community in Nablus is an abandoned synagogue. The Israeli army maintains a presence in the area. The Samaritans of Nablus relocated to the village of Kiryat Luza. In the mid-1990s, the Samaritans of Kiryat Luza were granted Israeli citizenship. They also became citizens of the Palestinian Authority following the Oslo Accords. As a result, they are the only people to possess dual Israeli-Palestinian citizenship. Today, Samaritans in Israel are fully integrated into society and serve in the Israel Defense Forces. The Samaritans of the West Bank seek good relations with their Palestinian neighbors while maintaining their Israeli citizenship, tend to be fluent in Hebrew and Arabic, and use both a Hebrew and Arab name. Some of them hold political office in Nablus, and at least one Samaritan, Nader Sadaqa of Nablus, has been involved in Palestinian militancy. Genetic studies Demographic investigations of the Samaritan community were carried out in the 1960s. Detailed pedigrees of the last 13 generations show that the Samaritans comprise four lineages: Recently several genetic studies on the Samaritan population were made using haplogroup comparisons as well as wide-genome genetic studies. Of the 12 Samaritan males used in the analysis, 10 (83%) had Y chromosomes belonging to haplogroup J, which includes three of the four Samaritan families. The Joshua-Marhiv family belongs to Haplogroup J-M267 (formerly "J1"), while the Danafi and Tsedakah families belong to haplogroup J-M172 (formerly "J2"), and can be further distinguished by the M67 SNP—the derived allele of which has been found in the Danafi family—and the PF5169 SNP found in the Tsedakah family. However the biggest and most important Samaritan family, the Cohen family (Tradition: Tribe of Levi), was found to belong to haplogroup E. A 2004 article on the genetic ancestry of the Samaritans by Shen et al. concluded from a sample comparing Samaritans to several Jewish populations, all currently living in Israel—representing the Beta Israel, Ashkenazi Jews, Iraqi Jews, Libyan Jews, Moroccan Jews, and Yemenite Jews, as well as Israeli Druze and Palestinians—that "the principal components analysis suggested a common ancestry of Samaritan and Jewish patrilineages. Most of the former may be traced back to a common ancestor in what is today identified as the paternally inherited Israelite high priesthood (Cohanim) with a common ancestor projected to the time of the Assyrian conquest of the kingdom of Israel." Moreover, the research paper states "Samaritan and Jewish Y-chromosomes have a much greater affinity than do those of the Samaritans, and their longtime geographical neighbors, the Palestinians. However, this is not the case for the mtDNA haplotypes. In fact, Table 4 shows that distances of Samaritans to Jews and Palestinians for mtDNA are about the same." The mitochondrial lineages of Samaritans is most similar to Iraqi Jews. The research suggests this is because Iraqi Jews have a preserved direct lineage from ancient Babylonian, and pre-Exilic Jewish populations just like Samaritan women of today which are descended from ancient pre-Assyrian exile Israelite women Autosomally, the Samaritans cluster with other Levantine populations. The Samaritans also resemble other Levantine groups in terms of their admixture, but they do not have much of the sub-Saharan African admixture found in small amounts in their Arab neighbours. They also show significant genetic drift that distinguishes them from others. Demographics An estimated 1 million Samaritans lived during biblical times, but in recent times the numbers are smaller. There were 100 in 1786 and 141 in 1919, then 150 in 1967. This grew to 745 in 2011, 751 in 2012, 756 in 2013, 760 in 2014, 777 in 2015, 785 in 2016, 796 in 2017, 810 in 2018 and 820 in 2019. The Samaritan community dropped in numbers during the various periods of Muslim rule in the region. The Samaritans could not rely on foreign assistance as much as the Christians did, nor on a large number of diaspora immigrants as did the Jews. The once-flourishing community declined over time, either through emigration or conversion to Islam among those who remained. Today, half reside in modern homes at Kiryat Luza on Mount Gerizim, which is sacred to them, and the rest in Holon. There are also four Samaritan families residing in Binyamina-Giv'at Ada, Matan, and Ashdod. As a small community physically divided between neighbors in a hostile region, Samaritans have been hesitant to overtly take sides in the Arab–Israeli conflict, fearing that doing so could lead to negative repercussions. Samaritans who are Israeli citizens are drafted into the military, along with the Jewish citizens of Israel. Relations of Samaritans with Israeli Jews, Muslim and Christian Palestinians in neighboring areas have been mixed. Samaritans living in both Israel and in the West Bank have Israeli citizenship. Samaritans in the Palestinian Authority-ruled territories are a minority in the midst of a Muslim majority. They had a reserved seat in the Palestinian Legislative Council in the election of 1996, but they no longer have one. Samaritans living in the West Bank have been granted passports by both Israel and the Palestinian Authority. One of the biggest problems facing the community today is the issue of continuity. With such a small population, divided into only four families or houses (Cohen, Tsedakah, Danafi, and Marhiv, with the Matar family dying out in 1968),[q] and a general refusal to accept converts, it is common for Samaritans to marry within their extended families, even first cousins. There has been a history of genetic disorders within the group due to the small gene pool. To counter this, the Holon Samaritan community has allowed men from the community to marry non-Samaritan (primarily Israeli Jewish) women, provided that the women agree to follow Samaritan religious practices. There is a six-month trial period before officially joining the Samaritan community to see whether this is a commitment that the woman would like to take. This often poses a problem for the women, who are typically less than eager to adopt the strict interpretation of biblical (Levitical) laws regarding menstruation, by which they must live in a separate dwelling during their periods and after childbirth. There have been a few instances of intermarriage. In addition, all marriages within the Samaritan community are first approved by a geneticist at Tel HaShomer Hospital, in order to prevent the spread of genetic disorders. In meetings arranged by "international marriage agencies", a small number of women from Russia and Ukraine who agree to observe Samaritan religious practices have been allowed to marry into the Qiryat Luza Samaritan community in an effort to expand the gene pool. Polygamy is reported to have been practiced among Samaritans up until sometime in the 19th century. Today it is practically unheard of, due to the low availability of women and, among those Samaritans living within Israeli territory, it being illegal. The Samaritan community in Israel also faces demographic challenges as some young people leave the community and convert to Judaism. A notable example is Israeli television presenter Sofi Tsedaka, who has made a documentary about her leaving the community at age 18. The head of the community is the Samaritan High Priest, who is the 133rd generation since Ithamar, a son of Aaron the priest's line from 1624 CE onward; before then, the line of priesthood went through Elazar, son of Aaron the priest. The current high priest is Aabed-El ben Asher ben Matzliach who assumed the office on 19 April 2013. The High Priest of every generation is selected by the eldest in age from the priestly family and resides on Mount Gerizim. Much of the local Palestinian population of Nablus is believed to be descended from Samaritans who converted to Islam. Traditions of Samaritan ancestry were also recorded in villages in the vicinity, such as Hajjah. Even today, certain Nabulsi family names such as Al-Amad, Al-Samri, Maslamani, Yaish, and Shakhsheer among others, are associated with Samaritan ancestry. The Yaish family of Nablus, for example, is said to be descended from the Samaritan Mitawiyah family of the Tribe of Manasseh, founded by Mitwayyah, who himself descended from Magged, a person who lived in the 7th century. According to the historian Fayyad Altif, large numbers of Samaritans converted due to persecution under various Muslim rulers, and because the monotheistic nature of Islam made it easy for them to accept it. During the Abbasid period, economic hardships, social disorder, and pressure from Muslim attackers, drove many Samaritans to convert to Islam. Later, the al-Hakim Edict issued by the Fatimid Caliphate in 1021, ordering Jews and Christians in the Southern Levant to convert to Islam or leave, along with another forced conversion by the rebel ibn Firāsa, hastened the Samaritans' rapid decline and nearly led to their extinction as a distinct religious community. The Samaritans themselves describe the Ottoman period as the worst period in their modern history, as many Samaritan families were forced to convert to Islam during that time. As a result, the Samaritans decreased from nearly a million and a half in late Roman (Byzantine) times to 146 people by the end of the Ottoman period. Samaritan historian Benyamim Tsedaka noted that many Samaritans who converted to Islam retained their original surnames, passing them on to future generations. Consequently, in most villages with names of Hebrew origin, but altered by Arabic pronunciation, Arab families still bear the surnames of their Samaritan ancestors. In Nablus itself, he notes, some Muslims openly acknowledge their Samaritan ancestry. For instance, in 1968, Fatah militant Naser Sharshir suggested the possibility of having Samaritan blood in his lineage, tracing back to his great-grandfather. In 1940, Israeli historian and future president Yitzhak Ben-Zvi wrote an article in which he stated that two thirds of the residents of Nablus and the surrounding neighboring villages were of Samaritan origin. He mentioned the name of several Palestinian Muslim families as having Samaritan origins, including the Al-Amad, Al-Samri, Buwarda and Kasem families, who protected Samaritans from Muslim persecution in the 1850s. Additionally, he wrote that these families had written records testifying to their Samaritan ancestry, which were maintained by their priests and elders. Samaritanism Samaritanism is centered on the Samaritan Pentateuch, which Samaritans believe to be the original and unaltered version of the Torah that was given to Moses and the Israelites on Mount Sinai. The Samaritan Pentateuch contains some differences from the Masoretic version of the Torah used in Judaism; according to Samaritan tradition, key parts of the Jewish text were fabricated by Ezra.[r] The Samaritan version of the Book of Joshua also differs from the Jewish version, which focuses on Shiloh. According to Samaritan tradition, Joshua built a temple (al-haikal) on Mount Gerizim and placed therein a tabernacle (al-maškan) in the second year of the Israelites' entry into the land of Canaan.[s] According to Samaritan scripture and tradition, Mount Gerizim, located near the Biblical city of Shechem (on the southern side of modern-day Nablus, West Bank), has been venerated as the holiest place for the Israelites since the conquest of Canaan by Joshua, long before the Temple in Jerusalem was established under Davidic and Solomonic rule over the United Kingdom of Israel. This view differs from Jewish belief which views the Temple Mount in Jerusalem as the holiest site in the world to worship God. It is commonly taught in Samaritan tradition that there are 13 references to Mount Gerizim in the Torah to prove their claim of holiness in contrast to Judaism, which relies solely on the later Jewish prophets and writings to back their claims of the holiness of Jerusalem. Other Samaritan tradition books include the Memar Marqah ('The teaching of Marqah'), the Samaritan liturgy known as "the Defter", and Samaritan law codes and biblical commentaries. Samaritans outside the Holy Land observe most Samaritan practices and rituals such as the Sabbath, ritual purity, and all festivals of Samaritanism with the exception of the Passover sacrifice, which can only be observed at Mount Gerizim.[citation needed] According to Samaritans,[better source needed] it was on Mount Gerizim that Abraham was commanded by God to offer his son Isaac as a sacrifice. God then causes the sacrifice to be interrupted, explaining that this was the ultimate test of Abraham's obedience, as a result of which all the world would be blessed. The Torah mentions the place where God chooses to establish his name (Deuteronomy 12:5), and Judaism believes this refers to Jerusalem. In contrast, the Samaritan text speaks of the place where God has chosen to establish his name, and Samaritans identify it as Mount Gerizim, making it the focus of their spiritual values. The legitimacy of the Judaic versus Samaritan belief was argued by Jewish scholar Andronicus ben Meshullam in the 2nd century BCE at the court of King Ptolemy VI Philometor. In the New Testament, the Gospel of John describes an encounter between a Samaritan woman and Jesus. When the woman realizes that Jesus is the Messiah, she asks Him whether Mount Gerizim or Jerusalem is where God commanded Abraham to bind Isaac. Jesus affirms the Judaic belief, saying "You [the Samaritans] worship what you do not know", although he also says: "a time is coming when you will worship the Father neither on this mountain nor in Jerusalem." (BSB) The Samaritans have retained an offshoot of the Ancient Hebrew script, a High Priesthood, the slaughtering and eating of lambs on Passover eve, and the celebration of the first month's beginning around springtime as the New Year. Yom Teru'ah (the biblical name for "Rosh Hashanah"), at the beginning of Tishrei, is not considered a New Year as it is in Rabbinic Judaism. The Samaritan Pentateuch differs from the Jewish Masoretic Text as well. Some differences are doctrinal: for example, the Samaritan Torah explicitly states that Mount Gerizim is "the place that God has chosen" to establish his name, as opposed to the Jewish Torah that refers to "the place that God chooses". Other differences are minor and seem more or less accidental. Samaritans refer to themselves as Benai Yisrael ("Children of Israel"), which is a term used by all Jewish denominations as a name for the Jewish people as a whole. They, however, do not refer to themselves as Yehudim (literally "Judeans"), the standard Hebrew name for Jews. The Talmudic attitude expressed in tractate Kutim is that they are to be treated as Jews in matters where their practice coincides with Rabbinic Judaism but as non-Jews where their practice differs. Some claim that since the 19th century, Rabbinic Judaism has regarded the Samaritans as a Jewish sect and the term "Samaritan Jews" has been used for them. Samaritan law is not the same as Halakha (Rabbinic Jewish law). The Samaritans have several groups of religious texts, which correspond to Jewish Halakha. A few examples of such texts are: Christian sources: New Testament Samaria or Samaritans are mentioned in the New Testament books of Matthew, Luke, John and Acts. The Gospel of Mark contains no mention of Samaritans or Samaria. The best known reference to the Samaritans is the Parable of the Good Samaritan, found in the Gospel of Luke. The following references are found: Notable Samaritans See also Notes References Sources External links Media |
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