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[SOURCE: https://en.wikipedia.org/wiki/Mule_deer] \| [TOKENS: 3146]
Contents Mule deer 10, but some disputed (see text) The mule deer (Odocoileus hemionus) is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer.[excessive citations] Mule deer are found only on the western Great Plains, in the Rocky Mountains, in the southwest United States, and on the west coast of North America. Their range is much smaller than the related white-tailed deer, which are found throughout most of North America east of the Rocky Mountains and in the valleys of the Rocky Mountains from Idaho and Wyoming northward. Mule deer have also been introduced to Argentina and Kauai, Hawaii. Taxonomy Mule deer can be divided into two main groups: the mule deer (sensu stricto) and the black-tailed deer. The first group includes all subspecies, except O. h. columbianus and O. h. sitkensis, which are in the black-tailed deer group. The two main groups have been treated as separate species, but they hybridize, and virtually all recent authorities treat the mule deer and black-tailed deer as conspecific.[excessive citations] Mule deer apparently evolved from the black-tailed deer. Despite this, the mtDNA of the white-tailed deer and mule deer is similar, but differs from that of the black-tailed deer. This may be the result of introgression, although hybrids between the mule deer and white-tailed deer are rare in the wild (apparently more common locally in West Texas), and the hybrid survival rate is low even in captivity. Many claims of observations of wild hybrids are not legitimate, as identification based on external features is complicated. Some authorities have recognized O. h. crooki as a senior synonym of O. h. eremicus, but the type specimen of the former is a hybrid between the mule deer and white-tailed deer, so the name O. h. crooki is invalid. Additionally, the validity of O. h. inyoensis has been questioned, and the two insular O. h. cerrosensis and O. h. sheldoni may be synonyms of O. h. eremicus or O. h. peninsulae. The 10 valid subspecies, based on the third edition of Mammal Species of the World, are: Description The most noticeable differences between white-tailed and mule deer are ear size, tail color, and antler configuration. In many cases, body size is also a key difference. The mule deer's tail is black-tipped, whereas the white-tailed deer's is not. Mule deer antlers are bifurcated; they "fork" as they grow, rather than branching from a single main beam, as is the case with white-tails. Each spring, a buck's antlers start to regrow almost immediately after the old antlers are shed. Shedding typically takes place in mid-February, with variations occurring by locale. Although capable of running, mule deer are often seen stotting (also called pronking), with all four feet coming down together. The mule deer is the larger of the three Odocoileus species on average, with a height of 80–106 cm (31–42 in) at the shoulders and a nose-to-tail length ranging from 1.2 to 2.1 m (3.9 to 6.9 ft). Of this, the tail may comprise 11.6 to 23 cm (4.6 to 9.1 in). Adult bucks normally weigh 55–150 kg (121–331 lb), averaging around 92 kg (203 lb), although trophy specimens may weigh up to 210 kg (460 lb). Does (female deer) are smaller and typically weigh from 43 to 90 kg (95 to 198 lb), with an average of around 68 kg (150 lb).[excessive citations] Unlike the white-tailed, the mule deer does not generally show marked size variation across its range, although environmental conditions can cause considerable weight fluctuations in any given population. An exception to this is the Sitka deer subspecies (O. h. sitkensis). This race is markedly smaller than other mule deer, with an average weight of 54.5 kg (120 lb) and 36 kg (79 lb) in males and females, respectively. Seasonal behaviors In addition to movements related to available shelter and food, the breeding cycle is important in understanding deer behavior. The rut or mating season usually begins in the fall as does go into estrus for a period of a few days, and males become more aggressive, competing for mates. Does may mate with more than one buck and go back into estrus within a month if they did not become pregnant. The gestation period is about 190–200 days, with fawns born in the spring. The survival rate of the fawns during labor is about 50%. Fawns stay with their mothers during the summer and are weaned in the fall after about 60–75 days. Mule deer females usually give birth to two fawns, although if it is their first time having a fawn, they often have just one. A buck's antlers fall off during the winter, then grow again in preparation for the next season's rut. The annual cycle of antler growth is regulated by changes in the length of the day. The size of mule deer groups follows a marked seasonal pattern. Groups are smallest during fawning season (June and July in Saskatchewan and Alberta) and largest in early gestation (winter; February and March in Saskatchewan and Alberta). Besides humans, the three leading predators of mule deer are coyotes, wolves, and cougars. Bobcats, Canada lynx, wolverines, American black bears, and grizzly bears may prey upon adult deer but most often attack only fawns or infirm specimens, or they may eat a deer after it has died naturally. Bears and small carnivores are typically opportunistic feeders and pose little threat to a strong, healthy mule deer. Diet and foraging behaviors In 99 studies of mule deer diets, some 788 species of plants were eaten by mule deer, and their diets vary greatly depending on the season, geographic region, year, and elevation. The studies gave these data for Rocky Mountain mule deer diets: The diets of mule deer are very similar to those of white-tailed deer in areas where they coexist. Mule deer are intermediate feeders rather than pure browsers or grazers; they predominantly browse but also eat forb vegetation, small amounts of grass and, where available, tree or shrub fruits such as beans, pods, nuts (including acorns), and berries. Carbon isotopic study of mule deer in Yellowstone has shown them, along with elk, to be the most generalist large herbivores of the region. Mule deer readily adapt to agricultural products and landscape plantings. In the Sierra Nevada range, mule deer depend on the lichen Bryoria fremontii as a winter food source. The most common plant species consumed by mule deer are the following: Mule deer have also been known to eat ricegrass, gramagrass, and needlegrass, as well as bearberry, bitter cherry, black oak, California buckeye, ceanothus, cedar, cliffrose, cottonwood, creek dogwood, creeping barberry, dogwood, Douglas fir, elderberry, Fendlera species, goldeneye, holly-leaf buckthorn, jack pine, knotweed, Kohleria species, manzanita, mesquite, pine, rabbitbrush, ragweed, redberry, scrub oak, serviceberry (including Pacific serviceberry), Sierra juniper, silktassel, snowberry, stonecrop, sunflower, tesota, thimbleberry, turbinella oak, velvet elder, western chokecherry, wild cherry, and wild oats. Where available, mule deer also eat a variety of wild mushrooms, which are most abundant in late summer and fall in the southern Rocky Mountains; mushrooms provide moisture, protein, phosphorus, and potassium. Humans sometimes engage in supplemental feeding efforts in severe winters in an attempt to help mule deer avoid starvation. Wildlife agencies discourage such efforts, which cause harm to mule deer populations by spreading disease (such as tuberculosis and chronic wasting disease) when deer congregate for feed, disrupting migratory patterns, causing overpopulation of local mule deer populations, and causing habitat destruction from overbrowsing of shrubs and forbs. Supplemental feeding efforts might be appropriate when carefully conducted under limited circumstances, but to be successful, the feeding must begin early in the severe winter (before poor range conditions and severe weather cause malnourishment or starvation) and must be continued until range conditions can support the herd. Mule deer are variably gregarious, with a large proportion of solitary individuals (35 to 64%) and small groups (groups with ≤5 deer, 50 to 78%). Reported mean group size measurements are three to five and typical group size (i.e., crowding) is about seven. Nutrition Mule deer are ruminants, meaning they employ a nutrient acquisition strategy of fermenting plant material before digesting it. Deer consuming high-fiber, low-starch diets require less food than those consuming high-starch, low-fiber diets. Rumination time also increases when deer consume high-fiber, low-starch diets, which allows for increased nutrient acquisition due to greater length of fermentation. Because some of the subspecies of mule deer are migratory, they encounter variable habitats and forage quality throughout the year. Forages consumed in the summer are higher in digestible components (i.e. proteins, starches, sugars, and hemicellulose) than those consumed in the winter. The average gross energy content of the consumed forage material is 4.5 kcal/g. Due to fluctuations in forage quality and availability, mule deer fat storage varies throughout the year, with the most fat stored in October, which is depleted throughout the winter to the lowest levels of fat storage in March. Changes in hormone levels are indications of physiological adjustments to the changes in the habitat. Total body fat is a measure of the individual's energy reserves, while thyroid hormone concentrations are a metric to determine the deer's ability to use the fat reserves. Triiodothyronine (T3) hormone is directly involved with basal metabolic rate and thermoregulation. Migration Mule deer migrate from low elevation winter ranges to high elevation summer ranges. Although not all individuals in populations migrate, some will travel long distances between summer and winter ranges. Researchers discovered the longest mule deer migration in Wyoming spanning 150 miles from winter to summer range. Multiple US states track mule deer migrations.[excessive citations] Mule deer migrate in fall to avoid harsh winter conditions like deep snow that covers up food resources, and in spring follow the emergence of new growth northwards. There is evidence to suggest that mule deer migrate based on cognitive memory, meaning they use the same path year after year even if the availability of resources has changed. This contradicts the idea that animals will go to the areas with the best available resources, which makes migratory paths crucial for survival. There are many risks that mule deer face during migration including climate change and human disturbance. Climate change impacts on seasonal growth patterns constitute a risk for migrating mule deer by invalidating historic or learned migration paths. Human activities such as natural resource extraction, highways, fencing, and urban development all have an impact on mule deer populations and migrations through habitat degradation and fragmentation.[excessive citations] Natural gas extraction has been found to have varying negative effects on mule deer behavior and can even cause them to avoid areas they use to migrate. Highways not only cause injury and death to mule deer, but they can also serve as a barrier to migration. As traffic volumes increase, the more mule deer tend to avoid those areas and abandon their typical migration routes. It has also been found that fencing can alter deer behavior, acting as a barrier, and potentially changing mule deer migration patterns. In addition, urban development has replaced mule deer habitat with subdivisions, and human activity has increased. As a result of this, researchers have seen a decline in mule deer populations. This is especially prominent in Colorado where the human population has grown by over 2.2 million since 1980. Protecting migration corridors is essential to maintain healthy mule deer populations. One thing everyone can do is help slow the increase in climate change by using greener energy sources and reducing the amount of waste in our households. In addition, managers and researchers can assess the risks listed above and take the proper steps to mitigate any adverse impacts those risk have on mule deer populations. Not only will populations benefit from these efforts but so will many other wildlife species. One way to help protect deer from getting hit on roadways is to install high fence wildlife fencing with escape routes. This helps keep deer off the road, preventing vehicle collisions and allowing animals that are trapped between the road and the fence a way to escape to safety. However, to maintain migration routes that cross busy highways, managers have also implemented natural, vegetated, overpasses and underpasses to allow animals, like mule deer, to migrate and move safely across highways. Approaches to mitigating the impact of drilling and mining operations include regulating the time of year when active drilling and heavy traffic to sites are taking place, and using well-informed planning to protect critical deer habitat and using barriers to mitigate the activity, noise, light at the extraction sites. The increase in urbanization has impacted mule deer migrations and there is evidence to show it also disrupts gene flow among mule deer populations. One clear option is to not build houses in critical mule deer habitat; however, building near mule deer habitat has resulted in some deer becoming accustomed to humans and the resources, such as food and water. Rather than migrate through urban areas some deer tend to stay close to those urban developments, potentially for resources and to avoid the obstacles in urban areas. Suggested measures by property owners to protect mule deer genetic diversity and migration paths include planting deer-resistant plants, placing scare devices such as noise-makers, and desisting from feeding deer. Disease Wildlife officials in Utah announced that a November–December 2021 field study had detected the first case of SARS-CoV-2 in mule deer. Several deer possessed apparent SARS-CoV-2 antibodies, however a female deer in Morgan County had an active Delta variant infection. White-tailed deer, which are able to hybridize with mule deer and which have shown high rates of SARS-CoV-2 infection, have migrated into Morgan County and other traditional mule deer habitats since at least the early 2000s. Chronic wasting disease (CWD) is a disease rapidly spreading throughout populations of the Cervus family. It first appeared in captive deer in Colorado in 1967 but has made a large impact on wild mule deer populations since then, spreading throughout all of North America. References Further reading External links
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[SOURCE: https://en.wikipedia.org/wiki/Eastern_United_States] \| [TOKENS: 1956]
Contents Eastern United States The Eastern United States, often abbreviated as simply the East, is a macroregion of the United States located to the east of the Mississippi River. It variably includes between 17 and 26 states and Washington, D.C., the national capital. As of 2011, the Eastern United States had an estimated population exceeding 179 million, representing the majority (over 58 percent) of the total U.S. population. The three most populous cities in the Eastern United States are New York City, Chicago, and Philadelphia. Northeastern United States According to the U.S. Census Bureau, the Northeastern United States comprises nine states, including (north to south): Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New Jersey, New York, and Pennsylvania. The present-day Northeast is significantly smaller than the Northeastern Woodlands cultural area. The pre-Columbian Northeast had three major areas: the Coastal area, Saint Lawrence Lowlands, and Great Lakes-Riverine zones. The Coastal area includes the Atlantic Provinces of Canada and the Atlantic seaboard of the United States south to North Carolina. The Saint Lawrence Lowlands area includes parts of Southern Ontario, upstate New York, much of the Saint Lawrence River area, and the Susquehanna Valley. The Great Lakes-Riverine area includes the remaining inland areas of the Northeast, which were home to Central Algonquian and Siouan speakers. The Great Lakes region is sometimes considered a distinct cultural area due to its large concentration of Native American tribes. New England is a subregion of the northeastern U.S. that is bounded by the Atlantic Ocean, Canada, and the state of New York. It includes six states: Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut. In one of the earliest British colonial settlements in the New World, Pilgrims from England first settled in New England in 1620 at Plymouth Colony in and around present-day Plymouth, Massachusetts. In the late 18th century, the New England colonies were among the first North American British colonies to support an escalation in the American Revolution against Britain, launching the Boston Tea Party on December 16, 1773, and later firing the first shots of the American Revolutionary War in the Battles of Lexington and Concord on April 19, 1775. New England produced the first examples of American literature and philosophy and was home to the beginnings of free and compulsory public education. In the 19th century, the region played a prominent role in the movement to abolish slavery in the United States. It was the first region of the United States to be transformed by the Industrial Revolution. As of 2023, New England is home to two of the top ten universities in the nation, according to 2022–23 U.S. News & World Report rankings, Harvard University in Cambridge, Massachusetts (tied for third), and Massachusetts Institute of Technology in Cambridge, Massachusetts (tied for third). According to the United States Census Bureau, the Middle Atlantic is a subregion of the northeastern U.S. that includes three states: New Jersey, New York, and Pennsylvania. The Middle Atlantic region includes New York City, the largest city in the U.S. and a global center of finance and culture, and Philadelphia, the nation's sixth-largest city and first capital, where the Declaration of Independence was signed at Independence Hall in 1776, formally launching the American Revolutionary War, and later where the U.S. Constitution was drafted and ratified at Independence Hall in Philadelphia in 1789. As of 2023, the Mid-Atlantic region is home to four of the top twenty-five universities in the nation, according to 2022–23 U.S. News & World Report rankings: Princeton University in Princeton, New Jersey, Cornell University in Ithaca, New York, Columbia University in New York City, and the University of Pennsylvania in Philadelphia. The East North Central area, which includes Illinois, Indiana, Michigan, Ohio, and Wisconsin, can also be classified as a subregion of the Northeastern United States, as these states are in the Great Lakes-Riverine area. As one of two subregional divisions used to categorize the modern Midwest, the East North Central region closely matches the area of the Northwest Territory, excluding a portion of Minnesota. The East North Central states form a large part of the Great Lakes region, although the latter also includes Minnesota, New York, Pennsylvania and the Canadian province of Ontario. Culturally, the East North Central region of the U.S. has been historically influenced by the British and the French; Anglo-American culture permeated states covering the region following the westward expansion of the United States. Religiously, the East North Central states have been and remain predominantly affiliated with Christianity. Altogether, the five states are majority Catholic, non- and inter-denominational, Methodist, Lutheran, and Baptist. The largest non-Christian religion has been Islam. Chicago is the largest city in the region, followed by Columbus, Ohio and Indianapolis. Chicago has the largest metropolitan statistical area, followed by Detroit, and Minneapolis–Saint Paul. Sault Ste. Marie, Michigan is the oldest city in the region, founded by French missionaries and explorers in 1668. As of 2023, the East North Central States are home to one of the top ten universities in the nation, according to 2022–23 U.S. News & World Report rankings: the University of Chicago, which is ranked the sixth-best in the nation. Southeastern United States The Southeastern United States is a large region of the country that includes a core of states that reaches north to Maryland and West Virginia, bordering the Ohio River and Mason–Dixon line, and stretches west to Arkansas and Louisiana. Unlike the Northeast, there is no official U.S. government definition for the Southeast, and it is defined variably among agencies and organizations. Its unique cultural and historic heritage includes the following aspects: These aspects, among other things, led to "the South" developing distinctive customs, literature, musical styles, and varied cuisines that have profoundly shaped traditional American culture. The shift from a mainly rural society to more cities and urbanized metropolitan areas picked up speed following World War II in the 1940s. Since the late 20th century, certain Southeastern states and areas have seen great economic growth. This growth has led to many migrants moving to Southeastern states. In 2020, Fortune 500 companies headquartered in southeastern states included: Virginia with 22, Georgia with 18, Florida with 18, North Carolina with 13, and Tennessee with 10. The South Atlantic region of the United States is one of the nine Census Bureau Divisions of the country. This region corresponds to the Southern states/areas that were geographically part of the Thirteen Colonies, with the addition of Florida. It includes eight states and one federal district: Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia and the District of Columbia. The South Atlantic is also a recognized geographical division used by the United States Geological Survey.: 2 All entities within the region apart from the District of Columbia and West Virginia border the Atlantic Ocean. As of 2010, the South Atlantic states had a combined population of 61,774,970. The South Atlantic region covers 292,589 square miles (757,800 km2). With the exception of West Virginia, the region has seen rapid population growth and economic development in recent decades. As of 2023, the South Atlantic region is home to three of the top ten universities in the nation, according to 2022-23 U.S. News & World Report rankings: Johns Hopkins University in Baltimore, Maryland, Georgetown University in Washington, D.C., and Duke University in Durham, North Carolina, which is ranked the tenth-best in the nation. The East South Central region constitutes one of the nine U.S. Census Bureau divisions. Four states make up the division: Kentucky, Tennessee, Mississippi and Alabama. Historically, the area has been colonized and influenced by the French, Spanish, British, early US, and Confederate governments. Distinct among these states, Alabama's French culture has been preserved through the Alabama Creoles, and Kentucky's French culture can be observed throughout Louisville. The East South Central states form the core of Old Dixie, one of the nine moral regions identified by James Patterson and Peter Kim in their acclaimed 1991 geopolitical best-seller, The Day America Told The Truth. Politically and culturally, the East South Central is more conservative than the South Atlantic; Mississippi, Alabama, Kentucky, and Tennessee's governments have been described during 2012 to 2023 as some of the most conservative. Religiously, conservative Evangelical Protestantism dominates the East South Central region as a central part of the Bible Belt. As of 2020, the East South Central states had a combined population of 19,430,030. The East South Central region covers 183,401 square miles of land. Within the region, Tennessee is the largest state by population, though Alabama is the largest by land area; Tennessee was also the East South Central's fastest growing state between 2010 and 2020, with Alabama second. Kentucky was the third-fastest growing state, and Mississippi experienced population decline; despite population decline, Mississippi did increase in diversity. Major population centers The following is a list of the 25 largest cities in the Eastern United States, based on 2021 population estimates (within city limits, not metropolitan areas): See also References External links
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[SOURCE: https://en.wikipedia.org/wiki/Mars#cite_note-10.1038/d41586-023-03151-x-64] \| [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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Contents Elon Musk Elon Reeve Musk (/ˈiːlɒn/ EE-lon; born June 28, 1971) is a businessman and entrepreneur known for his leadership of Tesla, SpaceX, Twitter, and xAI. Musk has been the wealthiest person in the world since 2025; as of February 2026,[update] Forbes estimates his net worth to be around US$852 billion. Born into a wealthy family in Pretoria, South Africa, Musk emigrated in 1989 to Canada; he has Canadian citizenship since his mother was born there. He received bachelor's degrees in 1997 from the University of Pennsylvania before moving to California to pursue business ventures. In 1995, Musk co-founded the software company Zip2. Following its sale in 1999, he co-founded X.com, an online payment company that later merged to form PayPal, which was acquired by eBay in 2002. Musk also became an American citizen in 2002. In 2002, Musk founded the space technology company SpaceX, becoming its CEO and chief engineer; the company has since led innovations in reusable rockets and commercial spaceflight. Musk joined the automaker Tesla as an early investor in 2004 and became its CEO and product architect in 2008; it has since become a leader in electric vehicles. In 2015, he co-founded OpenAI to advance artificial intelligence (AI) research, but later left; growing discontent with the organization's direction and their leadership in the AI boom in the 2020s led him to establish xAI, which became a subsidiary of SpaceX in 2026. In 2022, he acquired the social network Twitter, implementing significant changes, and rebranding it as X in 2023. His other businesses include the neurotechnology company Neuralink, which he co-founded in 2016, and the tunneling company the Boring Company, which he founded in 2017. In November 2025, a Tesla pay package worth $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Musk was the largest donor in the 2024 U.S. presidential election, where he supported Donald Trump. After Trump was inaugurated as president in early 2025, Musk served as Senior Advisor to the President and as the de facto head of the Department of Government Efficiency (DOGE). After a public feud with Trump, Musk left the Trump administration and returned to managing his companies. Musk is a supporter of global far-right figures, causes, and political parties. His political activities, views, and statements have made him a polarizing figure. Musk has been criticized for COVID-19 misinformation, promoting conspiracy theories, and affirming antisemitic, racist, and transphobic comments. His acquisition of Twitter was controversial due to a subsequent increase in hate speech and the spread of misinformation on the service, following his pledge to decrease censorship. His role in the second Trump administration attracted public backlash, particularly in response to DOGE. The emails he sent to Jeffrey Epstein are included in the Epstein files, which were published between 2025–26 and became a topic of worldwide debate. Early life Elon Reeve Musk was born on June 28, 1971, in Pretoria, South Africa's administrative capital. He is of British and Pennsylvania Dutch ancestry. His mother, Maye (née Haldeman), is a model and dietitian born in Saskatchewan, Canada, and raised in South Africa. Musk therefore holds both South African and Canadian citizenship from birth. His father, Errol Musk, is a South African electromechanical engineer, pilot, sailor, consultant, emerald dealer, and property developer, who partly owned a rental lodge at Timbavati Private Nature Reserve. His maternal grandfather, Joshua N. Haldeman, who died in a plane crash when Elon was a toddler, was an American-born Canadian chiropractor, aviator and political activist in the technocracy movement who moved to South Africa in 1950. Elon has a younger brother, Kimbal, a younger sister, Tosca, and four paternal half-siblings. Musk was baptized as a child in the Anglican Church of Southern Africa. Despite both Elon and Errol previously stating that Errol was a part owner of a Zambian emerald mine, in 2023, Errol recounted that the deal he made was to receive "a portion of the emeralds produced at three small mines". Errol was elected to the Pretoria City Council as a representative of the anti-apartheid Progressive Party and has said that his children shared their father's dislike of apartheid. After his parents divorced in 1979, Elon, aged around 9, chose to live with his father because Errol Musk had an Encyclopædia Britannica and a computer. Elon later regretted his decision and became estranged from his father. Elon has recounted trips to a wilderness school that he described as a "paramilitary Lord of the Flies" where "bullying was a virtue" and children were encouraged to fight over rations. In one incident, after an altercation with a fellow pupil, Elon was thrown down concrete steps and beaten severely, leading to him being hospitalized for his injuries. Elon described his father berating him after he was discharged from the hospital. Errol denied berating Elon and claimed, "The [other] boy had just lost his father to suicide, and Elon had called him stupid. Elon had a tendency to call people stupid. How could I possibly blame that child?" Elon was an enthusiastic reader of books, and had attributed his success in part to having read The Lord of the Rings, the Foundation series, and The Hitchhiker's Guide to the Galaxy. At age ten, he developed an interest in computing and video games, teaching himself how to program from the VIC-20 user manual. At age twelve, Elon sold his BASIC-based game Blastar to PC and Office Technology magazine for approximately $500 (equivalent to $1,600 in 2025). Musk attended Waterkloof House Preparatory School, Bryanston High School, and then Pretoria Boys High School, where he graduated. Musk was a decent but unexceptional student, earning a 61/100 in Afrikaans and a B on his senior math certification. Musk applied for a Canadian passport through his Canadian-born mother to avoid South Africa's mandatory military service, which would have forced him to participate in the apartheid regime, as well as to ease his path to immigration to the United States. While waiting for his application to be processed, he attended the University of Pretoria for five months. Musk arrived in Canada in June 1989, connected with a second cousin in Saskatchewan, and worked odd jobs, including at a farm and a lumber mill. In 1990, he entered Queen's University in Kingston, Ontario. Two years later, he transferred to the University of Pennsylvania, where he studied until 1995. Although Musk has said that he earned his degrees in 1995, the University of Pennsylvania did not award them until 1997 – a Bachelor of Arts in physics and a Bachelor of Science in economics from the university's Wharton School. He reportedly hosted large, ticketed house parties to help pay for tuition, and wrote a business plan for an electronic book-scanning service similar to Google Books. In 1994, Musk held two internships in Silicon Valley: one at energy storage startup Pinnacle Research Institute, which investigated electrolytic supercapacitors for energy storage, and another at Palo Alto–based startup Rocket Science Games. In 1995, he was accepted to a graduate program in materials science at Stanford University, but did not enroll. Musk decided to join the Internet boom of the 1990s, applying for a job at Netscape, to which he reportedly never received a response. The Washington Post reported that Musk lacked legal authorization to remain and work in the United States after failing to enroll at Stanford. In response, Musk said he was allowed to work at that time and that his student visa transitioned to an H1-B. According to numerous former business associates and shareholders, Musk said he was on a student visa at the time. Business career In 1995, Musk, his brother Kimbal, and Greg Kouri founded the web software company Zip2 with funding from a group of angel investors. They housed the venture at a small rented office in Palo Alto. Replying to Rolling Stone, Musk denounced the notion that they started their company with funds borrowed from Errol Musk, but in a tweet, he recognized that his father contributed 10% of a later funding round. The company developed and marketed an Internet city guide for the newspaper publishing industry, with maps, directions, and yellow pages. According to Musk, "The website was up during the day and I was coding it at night, seven days a week, all the time." To impress investors, Musk built a large plastic structure around a standard computer to create the impression that Zip2 was powered by a small supercomputer. The Musk brothers obtained contracts with The New York Times and the Chicago Tribune, and persuaded the board of directors to abandon plans for a merger with CitySearch. Musk's attempts to become CEO were thwarted by the board. Compaq acquired Zip2 for $307 million in cash in February 1999 (equivalent to $590,000,000 in 2025), and Musk received $22 million (equivalent to $43,000,000 in 2025) for his 7-percent share. In 1999, Musk co-founded X.com, an online financial services and e-mail payment company. The startup was one of the first federally insured online banks, and, in its initial months of operation, over 200,000 customers joined the service. The company's investors regarded Musk as inexperienced and replaced him with Intuit CEO Bill Harris by the end of the year. The following year, X.com merged with online bank Confinity to avoid competition. Founded by Max Levchin and Peter Thiel, Confinity had its own money-transfer service, PayPal, which was more popular than X.com's service. Within the merged company, Musk returned as CEO. Musk's preference for Microsoft software over Unix created a rift in the company and caused Thiel to resign. Due to resulting technological issues and lack of a cohesive business model, the board ousted Musk and replaced him with Thiel in 2000.[b] Under Thiel, the company focused on the PayPal service and was renamed PayPal in 2001. In 2002, PayPal was acquired by eBay for $1.5 billion (equivalent to $2,700,000,000 in 2025) in stock, of which Musk—the largest shareholder with 11.72% of shares—received $175.8 million (equivalent to $320,000,000 in 2025). In 2017, Musk purchased the domain X.com from PayPal for an undisclosed amount, stating that it had sentimental value. In 2001, Musk became involved with the nonprofit Mars Society and discussed funding plans to place a growth-chamber for plants on Mars. Seeking a way to launch the greenhouse payloads into space, Musk made two unsuccessful trips to Moscow to purchase intercontinental ballistic missiles (ICBMs) from Russian companies NPO Lavochkin and Kosmotras. Musk instead decided to start a company to build affordable rockets. With $100 million of his early fortune, (equivalent to $180,000,000 in 2025) Musk founded SpaceX in May 2002 and became the company's CEO and Chief Engineer. SpaceX attempted its first launch of the Falcon 1 rocket in 2006. Although the rocket failed to reach Earth orbit, it was awarded a Commercial Orbital Transportation Services program contract from NASA, then led by Mike Griffin. After two more failed attempts that nearly caused Musk to go bankrupt, SpaceX succeeded in launching the Falcon 1 into orbit in 2008. Later that year, SpaceX received a $1.6 billion NASA contract (equivalent to $2,400,000,000 in 2025) for Falcon 9-launched Dragon spacecraft flights to the International Space Station (ISS), replacing the Space Shuttle after its 2011 retirement. In 2012, the Dragon vehicle docked with the ISS, a first for a commercial spacecraft. Working towards its goal of reusable rockets, in 2015 SpaceX successfully landed the first stage of a Falcon 9 on a land platform. Later landings were achieved on autonomous spaceport drone ships, an ocean-based recovery platform. In 2018, SpaceX launched the Falcon Heavy; the inaugural mission carried Musk's personal Tesla Roadster as a dummy payload. Since 2019, SpaceX has been developing Starship, a reusable, super heavy-lift launch vehicle intended to replace the Falcon 9 and Falcon Heavy. In 2020, SpaceX launched its first crewed flight, the Demo-2, becoming the first private company to place astronauts into orbit and dock a crewed spacecraft with the ISS. In 2024, NASA awarded SpaceX an $843 million (equivalent to $865,000,000 in 2025) contract to build a spacecraft that NASA will use to deorbit the ISS at the end of its lifespan. In 2015, SpaceX began development of the Starlink constellation of low Earth orbit satellites to provide satellite Internet access. After the launch of prototype satellites in 2018, the first large constellation was deployed in May 2019. As of May 2025[update], over 7,600 Starlink satellites are operational, comprising 65% of all operational Earth satellites. The total cost of the decade-long project to design, build, and deploy the constellation was estimated by SpaceX in 2020 to be $10 billion (equivalent to $12,000,000,000 in 2025).[c] During the Russian invasion of Ukraine, Musk provided free Starlink service to Ukraine, permitting Internet access and communication at a yearly cost to SpaceX of $400 million (equivalent to $440,000,000 in 2025). However, Musk refused to block Russian state media on Starlink. In 2023, Musk denied Ukraine's request to activate Starlink over Crimea to aid an attack against the Russian navy, citing fears of a nuclear response. Tesla, Inc., originally Tesla Motors, was incorporated in July 2003 by Martin Eberhard and Marc Tarpenning. Both men played active roles in the company's early development prior to Musk's involvement. Musk led the Series A round of investment in February 2004; he invested $6.35 million (equivalent to $11,000,000 in 2025), became the majority shareholder, and joined Tesla's board of directors as chairman. Musk took an active role within the company and oversaw Roadster product design, but was not deeply involved in day-to-day business operations. Following a series of escalating conflicts in 2007 and the 2008 financial crisis, Eberhard was ousted from the firm.[page needed] Musk assumed leadership of the company as CEO and product architect in 2008. A 2009 lawsuit settlement with Eberhard designated Musk as a Tesla co-founder, along with Tarpenning and two others. Tesla began delivery of the Roadster, an electric sports car, in 2008. With sales of about 2,500 vehicles, it was the first mass production all-electric car to use lithium-ion battery cells. Under Musk, Tesla has since launched several well-selling electric vehicles, including the four-door sedan Model S (2012), the crossover Model X (2015), the mass-market sedan Model 3 (2017), the crossover Model Y (2020), and the pickup truck Cybertruck (2023). In May 2020, Musk resigned as chairman of the board as part of the settlement of a lawsuit from the SEC over him tweeting that funding had been "secured" for potentially taking Tesla private. The company has also constructed multiple lithium-ion battery and electric vehicle factories, called Gigafactories. Since its initial public offering in 2010, Tesla stock has risen significantly; it became the most valuable carmaker in summer 2020, and it entered the S&P 500 later that year. In October 2021, it reached a market capitalization of $1 trillion (equivalent to $1,200,000,000,000 in 2025), the sixth company in U.S. history to do so. Musk provided the initial concept and financial capital for SolarCity, which his cousins Lyndon and Peter Rive founded in 2006. By 2013, SolarCity was the second largest provider of solar power systems in the United States. In 2014, Musk promoted the idea of SolarCity building an advanced production facility in Buffalo, New York, triple the size of the largest solar plant in the United States. Construction of the factory started in 2014 and was completed in 2017. It operated as a joint venture with Panasonic until early 2020. Tesla acquired SolarCity for $2 billion in 2016 (equivalent to $2,700,000,000 in 2025) and merged it with its battery unit to create Tesla Energy. The deal's announcement resulted in a more than 10% drop in Tesla's stock price; at the time, SolarCity was facing liquidity issues. Multiple shareholder groups filed a lawsuit against Musk and Tesla's directors, stating that the purchase of SolarCity was done solely to benefit Musk and came at the expense of Tesla and its shareholders. Tesla directors settled the lawsuit in January 2020, leaving Musk the sole remaining defendant. Two years later, the court ruled in Musk's favor. In 2016, Musk co-founded Neuralink, a neurotechnology startup, with an investment of $100 million. Neuralink aims to integrate the human brain with artificial intelligence (AI) by creating devices that are embedded in the brain. Such technology could enhance memory or allow the devices to communicate with software. The company also hopes to develop devices to treat neurological conditions like spinal cord injuries. In 2022, Neuralink announced that clinical trials would begin by the end of the year. In September 2023, the Food and Drug Administration approved Neuralink to initiate six-year human trials. Neuralink has conducted animal testing on macaques at the University of California, Davis. In 2021, the company released a video in which a macaque played the video game Pong via a Neuralink implant. The company's animal trials—which have caused the deaths of some monkeys—have led to claims of animal cruelty. The Physicians Committee for Responsible Medicine has alleged that Neuralink violated the Animal Welfare Act. Employees have complained that pressure from Musk to accelerate development has led to botched experiments and unnecessary animal deaths. In 2022, a federal probe was launched into possible animal welfare violations by Neuralink.[needs update] In 2017, Musk founded the Boring Company to construct tunnels; he also revealed plans for specialized, underground, high-occupancy vehicles that could travel up to 150 miles per hour (240 km/h) and thus circumvent above-ground traffic in major cities. Early in 2017, the company began discussions with regulatory bodies and initiated construction of a 30-foot (9.1 m) wide, 50-foot (15 m) long, and 15-foot (4.6 m) deep "test trench" on the premises of SpaceX's offices, as that required no permits. The Los Angeles tunnel, less than two miles (3.2 km) in length, debuted to journalists in 2018. It used Tesla Model Xs and was reported to be a rough ride while traveling at suboptimal speeds. Two tunnel projects announced in 2018, in Chicago and West Los Angeles, have been canceled. A tunnel beneath the Las Vegas Convention Center was completed in early 2021. Local officials have approved further expansions of the tunnel system. April 14, 2022 In early 2017, Musk expressed interest in buying Twitter and had questioned the platform's commitment to freedom of speech. By 2022, Musk had reached 9.2% stake in the company, making him the largest shareholder.[d] Musk later agreed to a deal that would appoint him to Twitter's board of directors and prohibit him from acquiring more than 14.9% of the company. Days later, Musk made a $43 billion offer to buy Twitter. By the end of April Musk had successfully concluded his bid for approximately $44 billion. This included approximately $12.5 billion in loans and $21 billion in equity financing. Having backtracked on his initial decision, Musk bought the company on October 27, 2022. Immediately after the acquisition, Musk fired several top Twitter executives including CEO Parag Agrawal; Musk became the CEO instead. Under Elon Musk, Twitter instituted monthly subscriptions for a "blue check", and laid off a significant portion of the company's staff. Musk lessened content moderation and hate speech also increased on the platform after his takeover. In late 2022, Musk released internal documents relating to Twitter's moderation of Hunter Biden's laptop controversy in the lead-up to the 2020 presidential election. Musk also promised to step down as CEO after a Twitter poll, and five months later, Musk stepped down as CEO and transitioned his role to executive chairman and chief technology officer (CTO). Despite Musk stepping down as CEO, X continues to struggle with challenges such as viral misinformation, hate speech, and antisemitism controversies. Musk has been accused of trying to silence some of his critics such as Twitch streamer Asmongold, who criticized him during one of his streams. Musk has been accused of removing their accounts' blue checkmarks, which hinders visibility and is considered a form of shadow banning, or suspending their accounts without justification. Other activities In August 2013, Musk announced plans for a version of a vactrain, and assigned engineers from SpaceX and Tesla to design a transport system between Greater Los Angeles and the San Francisco Bay Area, at an estimated cost of $6 billion. Later that year, Musk unveiled the concept, dubbed the Hyperloop, intended to make travel cheaper than any other mode of transport for such long distances. In December 2015, Musk co-founded OpenAI, a not-for-profit artificial intelligence (AI) research company aiming to develop artificial general intelligence, intended to be safe and beneficial to humanity. Musk pledged $1 billion of funding to the company, and initially gave $50 million. In 2018, Musk left the OpenAI board. Since 2018, OpenAI has made significant advances in machine learning. In July 2023, Musk launched the artificial intelligence company xAI, which aims to develop a generative AI program that competes with existing offerings like OpenAI's ChatGPT. Musk obtained funding from investors in SpaceX and Tesla, and xAI hired engineers from Google and OpenAI. December 16, 2022 Musk uses a private jet owned by Falcon Landing LLC, a SpaceX-linked company, and acquired a second jet in August 2020. His heavy use of the jets and the consequent fossil fuel usage have received criticism. Musk's flight usage is tracked on social media through ElonJet. In December 2022, Musk banned the ElonJet account on Twitter, and made temporary bans on the accounts of journalists that posted stories regarding the incident, including Donie O'Sullivan, Keith Olbermann, and journalists from The New York Times, The Washington Post, CNN, and The Intercept. In October 2025, Musk's company xAI launched Grokipedia, an AI-generated online encyclopedia that he promoted as an alternative to Wikipedia. Articles on Grokipedia are generated and reviewed by xAI's Grok chatbot. Media coverage and academic analysis described Grokipedia as frequently reusing Wikipedia content but framing contested political and social topics in line with Musk's own views and right-wing narratives. A study by Cornell University researchers and NBC News stated that Grokipedia cites sources that are blacklisted or considered "generally unreliable" on Wikipedia, for example, the conspiracy site Infowars and the neo-Nazi forum Stormfront. Wired, The Guardian and Time criticized Grokipedia for factual errors and for presenting Musk himself in unusually positive terms while downplaying controversies. Politics Musk is an outlier among business leaders who typically avoid partisan political advocacy. Musk was a registered independent voter when he lived in California. Historically, he has donated to both Democrats and Republicans, many of whom serve in states in which he has a vested interest. Since 2022, his political contributions have mostly supported Republicans, with his first vote for a Republican going to Mayra Flores in the 2022 Texas's 34th congressional district special election. In 2024, he started supporting international far-right political parties, activists, and causes, and has shared misinformation and numerous conspiracy theories. Since 2024, his views have been generally described as right-wing. Musk supported Barack Obama in 2008 and 2012, Hillary Clinton in 2016, Joe Biden in 2020, and Donald Trump in 2024. In the 2020 Democratic Party presidential primaries, Musk endorsed candidate Andrew Yang and expressed support for Yang's proposed universal basic income, and endorsed Kanye West's 2020 presidential campaign. In 2021, Musk publicly expressed opposition to the Build Back Better Act, a $3.5 trillion legislative package endorsed by Joe Biden that ultimately failed to pass due to unanimous opposition from congressional Republicans and several Democrats. In 2022, gave over $50 million to Citizens for Sanity, a conservative political action committee. In 2023, he supported Republican Ron DeSantis for the 2024 U.S. presidential election, giving $10 million to his campaign, and hosted DeSantis's campaign announcement on a Twitter Spaces event. From June 2023 to January 2024, Musk hosted a bipartisan set of X Spaces with Republican and Democratic candidates, including Robert F. Kennedy Jr., Vivek Ramaswamy, and Dean Phillips. In October 2025, former vice-president Kamala Harris commented that it was a mistake from the Democratic side to not invite Musk to a White House electric vehicle event organized in August 2021 and featuring executives from General Motors, Ford and Stellantis, despite Tesla being "the major American manufacturer of extraordinary innovation in this space." Fortune remarked that this was a nod to United Auto Workers and organized labor. Harris said presidents should put aside political loyalties when it came to recognizing innovation, and guessed that the non-invitation impacted Musk's perspective. Fortune noted that, at the time, Musk said, "Yeah, seems odd that Tesla wasn't invited." A month later, he criticized Biden as "not the friendliest administration." Jacob Silverman, author of the book Gilded Rage: Elon Musk and the Radicalization of Silicon Valley, said that the tech industry represented by Musk, Thiel, Andreessen and other capitalists, actually flourished under Biden, but the tech leaders chose Trump for their common ground on cultural issues. By early 2024, Musk had become a vocal and financial supporter of Donald Trump. In July 2024, minutes after the attempted assassination of Donald Trump, Musk endorsed him for president saying; "I fully endorse President Trump and hope for his rapid recovery." During the presidential campaign, Musk joined Trump on stage at a campaign rally, and during the campaign promoted conspiracy theories and falsehoods about Democrats, election fraud and immigration, in support of Trump. Musk was the largest individual donor of the 2024 election. In 2025, Musk contributed $19 million to the Wisconsin Supreme Court race, hoping to influence the state's future redistricting efforts and its regulations governing car manufacturers and dealers. In 2023, Musk said he shunned the World Economic Forum because it was boring. The organization commented that they had not invited him since 2015. He has participated in Dialog, dubbed "Tech Bilderberg" and organized by Peter Thiel and Auren Hoffman, though. Musk's international political actions and comments have come under increasing scrutiny and criticism, especially from the governments and leaders of France, Germany, Norway, Spain and the United Kingdom, particularly due to his position in the U.S. government as well as ownership of X. An NBC News analysis found he had boosted far-right political movements to cut immigration and curtail regulation of business in at least 18 countries on six continents since 2023. During his speech after the second inauguration of Donald Trump, Musk twice made a gesture interpreted by many as a Nazi or a fascist Roman salute.[e] He thumped his right hand over his heart, fingers spread wide, and then extended his right arm out, emphatically, at an upward angle, palm down and fingers together. He then repeated the gesture to the crowd behind him. As he finished the gestures, he said to the crowd, "My heart goes out to you. It is thanks to you that the future of civilization is assured." It was widely condemned as an intentional Nazi salute in Germany, where making such gestures is illegal. The Anti-Defamation League said it was not a Nazi salute, but other Jewish organizations disagreed and condemned the salute. American public opinion was divided on partisan lines as to whether it was a fascist salute. Musk dismissed the accusations of Nazi sympathies, deriding them as "dirty tricks" and a "tired" attack. Neo-Nazi and white supremacist groups celebrated it as a Nazi salute. Multiple European political parties demanded that Musk be banned from entering their countries. The concept of DOGE emerged in a discussion between Musk and Donald Trump, and in August 2024, Trump committed to giving Musk an advisory role, with Musk accepting the offer. In November and December 2024, Musk suggested that the organization could help to cut the U.S. federal budget, consolidate the number of federal agencies, and eliminate the Consumer Financial Protection Bureau, and that its final stage would be "deleting itself". In January 2025, the organization was created by executive order, and Musk was designated a "special government employee". Musk led the organization and was a senior advisor to the president, although his official role is not clear. In sworn statement during a lawsuit, the director of the White House Office of Administration stated that Musk "is not an employee of the U.S. DOGE Service or U.S. DOGE Service Temporary Organization", "is not the U.S. DOGE Service administrator", and has "no actual or formal authority to make government decisions himself". Trump said two days later that he had put Musk in charge of DOGE. A federal judge has ruled that Musk acted as the de facto leader of DOGE. Musk's role in the second Trump administration, particularly in response to DOGE, has attracted public backlash. He was criticized for his treatment of federal government employees, including his influence over the mass layoffs of the federal workforce. He has prioritized secrecy within the organization and has accused others of violating privacy laws. A Senate report alleged that Musk could avoid up to $2 billion in legal liability as a result of DOGE's actions. In May 2025, Bill Gates accused Musk of "killing the world's poorest children" through his cuts to USAID, which modeling by Boston University estimated had resulted in 300,000 deaths by this time, most of them of children. By November 2025, the estimated death toll had increased to 400,000 children and 200,000 adults. Musk announced on May 28, 2025, that he would depart from the Trump administration as planned when the special government employee's 130 day deadline expired, with a White House official confirming that Musk's offboarding from the Trump administration was already underway. His departure was officially confirmed during a joint Oval Office press conference with Trump on May 30, 2025. @realDonaldTrump is in the Epstein files. That is the real reason they have not been made public. June 5, 2025 After leaving office, Musk criticized the Trump administration's Big Beautiful Bill, calling it a "disgusting abomination" due to its provisions increasing the deficit. A feud began between Musk and Trump, with its most notable event being Musk alleging Trump had ties to sex offender Jeffrey Epstein on X (formerly Twitter) on June 5, 2025. Trump responded on Truth Social stating that Musk went "CRAZY" after the "EV Mandate" was purportedly taken away and threatened to cut Musk's government contracts. Musk then called for a third Trump impeachment. The next day, Trump stated that he did not wish to reconcile with Musk, and added that Musk would face "very serious consequences" if he funds Democratic candidates. On June 11, Musk publicly apologized for the tweets against Trump, saying they "went too far". Views November 6, 2022 Rejecting the conservative label, Musk has described himself as a political moderate, even as his views have become more right-wing over time. His views have been characterized as libertarian and far-right, and after his involvement in European politics, they have received criticism from world leaders such as Emmanuel Macron and Olaf Scholz. Within the context of American politics, Musk supported Democratic candidates up until 2022, at which point he voted for a Republican for the first time. He has stated support for universal basic income, gun rights, freedom of speech, a tax on carbon emissions, and H-1B visas. Musk has expressed concern about issues such as artificial intelligence (AI) and climate change, and has been a critic of wealth tax, short-selling, and government subsidies. An immigrant himself, Musk has been accused of being anti-immigration, and regularly blames immigration policies for illegal immigration. He is also a pronatalist who believes population decline is the biggest threat to civilization, and identifies as a cultural Christian. Musk has long been an advocate for space colonization, especially the colonization of Mars. He has repeatedly pushed for humanity colonizing Mars, in order to become an interplanetary species and lower the risks of human extinction. Musk has promoted conspiracy theories and made controversial statements that have led to accusations of racism, sexism, antisemitism, transphobia, disseminating disinformation, and support of white pride. While describing himself as a "pro-Semite", his comments regarding George Soros and Jewish communities have been condemned by the Anti-Defamation League and the Biden White House. Musk was criticized during the COVID-19 pandemic for making unfounded epidemiological claims, defying COVID-19 lockdowns restrictions, and supporting the Canada convoy protest against vaccine mandates. He has amplified false claims of white genocide in South Africa. Musk has been critical of Israel's actions in the Gaza Strip during the Gaza war, praised China's economic and climate goals, suggested that Taiwan and China should resolve cross-strait relations, and was described as having a close relationship with the Chinese government. In Europe, Musk expressed support for Ukraine in 2022 during the Russian invasion, recommended referendums and peace deals on the annexed Russia-occupied territories, and supported the far-right Alternative for Germany political party in 2024. Regarding British politics, Musk blamed the 2024 UK riots on mass migration and open borders, criticized Prime Minister Keir Starmer for what he described as a "two-tier" policing system, and was subsequently attacked as being responsible for spreading misinformation and amplifying the far-right. He has also voiced his support for far-right activist Tommy Robinson and pledged electoral support for Reform UK. In February 2026, Musk described Spanish Prime Minister Pedro Sánchez as a "tyrant" following Sánchez's proposal to prohibit minors under the age of 16 from accessing social media platforms. Legal affairs In 2018, Musk was sued by the U.S. Securities and Exchange Commission (SEC) for a tweet stating that funding had been secured for potentially taking Tesla private.[f] The securities fraud lawsuit characterized the tweet as false, misleading, and damaging to investors, and sought to bar Musk from serving as CEO of publicly traded companies. Two days later, Musk settled with the SEC, without admitting or denying the SEC's allegations. As a result, Musk and Tesla were fined $20 million each, and Musk was forced to step down for three years as Tesla chairman but was able to remain as CEO. Shareholders filed a lawsuit over the tweet, and in February 2023, a jury found Musk and Tesla not liable. Musk has stated in interviews that he does not regret posting the tweet that triggered the SEC investigation. In 2019, Musk stated in a tweet that Tesla would build half a million cars that year. The SEC reacted by asking a court to hold him in contempt for violating the terms of the 2018 settlement agreement. A joint agreement between Musk and the SEC eventually clarified the previous agreement details, including a list of topics about which Musk needed preclearance. In 2020, a judge blocked a lawsuit that claimed a tweet by Musk regarding Tesla stock price ("too high imo") violated the agreement. Freedom of Information Act (FOIA)-released records showed that the SEC concluded Musk had subsequently violated the agreement twice by tweeting regarding "Tesla's solar roof production volumes and its stock price". In October 2023, the SEC sued Musk over his refusal to testify a third time in an investigation into whether he violated federal law by purchasing Twitter stock in 2022. In February 2024, Judge Laurel Beeler ruled that Musk must testify again. In January 2025, the SEC filed a lawsuit against Musk for securities violations related to his purchase of Twitter. In January 2024, Delaware judge Kathaleen McCormick ruled in a 2018 lawsuit that Musk's $55 billion pay package from Tesla be rescinded. McCormick called the compensation granted by the company's board "an unfathomable sum" that was unfair to shareholders. The Delaware Supreme Court overturned McCormick's decision in December 2025, restoring Musk's compensation package and awarding $1 in nominal damages. Personal life Musk became a U.S. citizen in 2002. From the early 2000s until late 2020, Musk resided in California, where both Tesla and SpaceX were founded. He then relocated to Cameron County, Texas, saying that California had become "complacent" about its economic success. While hosting Saturday Night Live in 2021, Musk stated that he has Asperger syndrome (an outdated term for autism spectrum disorder). When asked about his experience growing up with Asperger's syndrome in a TED2022 conference in Vancouver, Musk stated that "the social cues were not intuitive ... I would just tend to take things very literally ... but then that turned out to be wrong — [people were not] simply saying exactly what they mean, there's all sorts of other things that are meant, and [it] took me a while to figure that out." Musk suffers from back pain and has undergone several spine-related surgeries, including a disc replacement. In 2000, he contracted a severe case of malaria while on vacation in South Africa. Musk has stated he uses doctor-prescribed ketamine for occasional depression and that he doses "a small amount once every other week or something like that"; since January 2024, some media outlets have reported that he takes ketamine, marijuana, LSD, ecstasy, mushrooms, cocaine and other drugs. Musk at first refused to comment on his alleged drug use, before responding that he had not tested positive for drugs, and that if drugs somehow improved his productivity, "I would definitely take them!". The New York Times' investigations revealed Musk's overuse of ketamine and numerous other drugs, as well as strained family relationships and concerns from close associates who have become troubled by his public behavior as he became more involved in political activities and government work. According to The Washington Post, President Trump described Musk as "a big-time drug addict". Through his own label Emo G Records, Musk released a rap track, "RIP Harambe", on SoundCloud in March 2019. The following year, he released an EDM track, "Don't Doubt Ur Vibe", featuring his own lyrics and vocals. Musk plays video games, which he stated has a "'restoring effect' that helps his 'mental calibration'". Some games he plays include Quake, Diablo IV, Elden Ring, and Polytopia. Musk once claimed to be one of the world's top video game players but has since admitted to "account boosting", or cheating by hiring outside services to achieve top player rankings. Musk has justified the boosting by claiming that all top accounts do it so he has to as well to remain competitive. In 2024 and 2025, Musk criticized the video game Assassin's Creed Shadows and its creator Ubisoft for "woke" content. Musk posted to X that "DEI kills art" and specified the inclusion of the historical figure Yasuke in the Assassin's Creed game as offensive; he also called the game "terrible". Ubisoft responded by saying that Musk's comments were "just feeding hatred" and that they were focused on producing a game not pushing politics. Musk has fathered at least 14 children, one of whom died as an infant. The Wall Street Journal reported in 2025 that sources close to Musk suggest that the "true number of Musk's children is much higher than publicly known". He had six children with his first wife, Canadian author Justine Wilson, whom he met while attending Queen's University in Ontario, Canada; they married in 2000. In 2002, their first child Nevada Musk died of sudden infant death syndrome at the age of 10 weeks. After his death, the couple used in vitro fertilization (IVF) to continue their family; they had twins in 2004, followed by triplets in 2006. The couple divorced in 2008 and have shared custody of their children. The elder twin he had with Wilson came out as a trans woman and, in 2022, officially changed her name to Vivian Jenna Wilson, adopting her mother's surname because she no longer wished to be associated with Musk. Musk began dating English actress Talulah Riley in 2008. They married two years later at Dornoch Cathedral in Scotland. In 2012, the couple divorced, then remarried the following year. After briefly filing for divorce in 2014, Musk finalized a second divorce from Riley in 2016. Musk then dated the American actress Amber Heard for several months in 2017; he had reportedly been "pursuing" her since 2012. In 2018, Musk and Canadian musician Grimes confirmed they were dating. Grimes and Musk have three children, born in 2020, 2021, and 2022.[g] Musk and Grimes originally gave their eldest child the name "X Æ A-12", which would have violated California regulations as it contained characters that are not in the modern English alphabet; the names registered on the birth certificate are "X" as a first name, "Æ A-Xii" as a middle name, and "Musk" as a last name. They received criticism for choosing a name perceived to be impractical and difficult to pronounce; Musk has said the intended pronunciation is "X Ash A Twelve". Their second child was born via surrogacy. Despite the pregnancy, Musk confirmed reports that the couple were "semi-separated" in September 2021; in an interview with Time in December 2021, he said he was single. In October 2023, Grimes sued Musk over parental rights and custody of X Æ A-Xii. Elon Musk has taken X Æ A-Xii to multiple official events in Washington, D.C. during Trump's second term in office. Also in July 2022, The Wall Street Journal reported that Musk allegedly had an affair with Nicole Shanahan, the wife of Google co-founder Sergey Brin, in 2021, leading to their divorce the following year. Musk denied the report. Musk also had a relationship with Australian actress Natasha Bassett, who has been described as "an occasional girlfriend". In October 2024, The New York Times reported Musk bought a Texas compound for his children and their mothers, though Musk denied having done so. Musk also has four children with Shivon Zilis, director of operations and special projects at Neuralink: twins born via IVF in 2021, a child born in 2024 via surrogacy and a child born in 2025.[h] On February 14, 2025, Ashley St. Clair, an influencer and author, posted on X claiming to have given birth to Musk's son Romulus five months earlier, which media outlets reported as Musk's supposed thirteenth child.[i] On February 22, 2025, it was reported that St Clair had filed for sole custody of her five-month-old son and for Musk to be recognised as the child's father. On March 31, 2025, Musk wrote that, while he was unsure if he was the father of St. Clair's child, he had paid St. Clair $2.5 million and would continue paying her $500,000 per year.[j] Later reporting from the Wall Street Journal indicated that $1 million of these payments to St. Clair were structured as a loan. In 2014, Musk and Ghislaine Maxwell appeared together in a photograph taken at an Academy Awards after-party, which Musk later described as a "photobomb". The January 2026 Epstein files contain emails between Musk and Epstein from 2012 to 2013, after Epstein's first conviction. Emails released on January 30, 2026, indicated that Epstein invited Musk to visit his private island on multiple occasions. The correspondence showed that while Epstein repeatedly encouraged Musk to attend, Musk did not visit the island. In one instance, Musk discussed the possibility of attending a party with his then-wife Talulah Riley and asked which day would be the "wildest party"; according to the emails, the visit did not take place after Epstein later cancelled the plans.[k] On Christmas day in 2012, Musk emailed Epstein asking "Do you have any parties planned? I’ve been working to the edge of sanity this year and so, once my kids head home after Christmas, I really want to hit the party scene in St Barts or elsewhere and let loose. The invitation is much appreciated, but a peaceful island experience is the opposite of what I’m looking for". Epstein replied that the "ratio on my island" might make Musk's wife uncomfortable to which Musk responded, "Ratio is not a problem for Talulah". On September 11, 2013, Epstein sent an email asking Musk if he had any plans for coming to New York for the opening of the United Nations General Assembly where many "interesting people" would be coming to his house to which Musk responded that "Flying to NY to see UN diplomats do nothing would be an unwise use of time". Epstein responded by stating "Do you think i am retarded. Just kidding, there is no one over 25 and all very cute." Musk has denied any close relationship with Epstein and described him as a "creep" who attempted to ingratiate himself with influential people. When Musk was asked in 2019 if he introduced Epstein to Mark Zuckerberg, Musk responded: "I don’t recall introducing Epstein to anyone, as I don’t know the guy well enough to do so." The released emails nonetheless showed cordial exchanges on a range of topics, including Musk's inquiry about parties on the island. The correspondence also indicated that Musk suggested hosting Epstein at SpaceX, while Epstein separately discussed plans to tour SpaceX and bring "the girls", though there is no evidence that such a visit occurred. Musk has described the release of the files a "distraction", later accusing the second Trump administration of suppressing them to protect powerful individuals, including Trump himself.[l] Wealth Elon Musk is the wealthiest person in the world, with an estimated net worth of US$690 billion as of January 2026, according to the Bloomberg Billionaires Index, and $852 billion according to Forbes, primarily from his ownership stakes in SpaceX and Tesla. Having been first listed on the Forbes Billionaires List in 2012, around 75% of Musk's wealth was derived from Tesla stock in November 2020, although he describes himself as "cash poor". According to Forbes, he became the first person in the world to achieve a net worth of $300 billion in 2021; $400 billion in December 2024; $500 billion in October 2025; $600 billion in mid-December 2025; $700 billion later that month; and $800 billion in February 2026. In November 2025, a Tesla pay package worth potentially $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Public image Although his ventures have been highly influential within their separate industries starting in the 2000s, Musk only became a public figure in the early 2010s. He has been described as an eccentric who makes spontaneous and impactful decisions, while also often making controversial statements, contrary to other billionaires who prefer reclusiveness to protect their businesses. Musk's actions and his expressed views have made him a polarizing figure. Biographer Ashlee Vance described people's opinions of Musk as polarized due to his "part philosopher, part troll" persona on Twitter. He has drawn denouncement for using his platform to mock the self-selection of personal pronouns, while also receiving praise for bringing international attention to matters like British survivors of grooming gangs. Musk has been described as an American oligarch due to his extensive influence over public discourse, social media, industry, politics, and government policy. After Trump's re-election, Musk's influence and actions during the transition period and the second presidency of Donald Trump led some to call him "President Musk", the "actual president-elect", "shadow president" or "co-president". Awards for his contributions to the development of the Falcon rockets include the American Institute of Aeronautics and Astronautics George Low Transportation Award in 2008, the Fédération Aéronautique Internationale Gold Space Medal in 2010, and the Royal Aeronautical Society Gold Medal in 2012. In 2015, he received an honorary doctorate in engineering and technology from Yale University and an Institute of Electrical and Electronics Engineers Honorary Membership. Musk was elected a Fellow of the Royal Society (FRS) in 2018.[m] In 2022, Musk was elected to the National Academy of Engineering. Time has listed Musk as one of the most influential people in the world in 2010, 2013, 2018, and 2021. Musk was selected as Time's "Person of the Year" for 2021. Then Time editor-in-chief Edward Felsenthal wrote that, "Person of the Year is a marker of influence, and few individuals have had more influence than Musk on life on Earth, and potentially life off Earth too." Notes References Works cited Further reading External links
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Contents OpenAI OpenAI is an American artificial intelligence research organization comprising both a non-profit foundation and a controlled for-profit public benefit corporation (PBC), headquartered in San Francisco. It aims to develop "safe and beneficial" artificial general intelligence (AGI), which it defines as "highly autonomous systems that outperform humans at most economically valuable work". OpenAI is widely recognized for its development of the GPT family of large language models, the DALL-E series of text-to-image models, and the Sora series of text-to-video models, which have influenced industry research and commercial applications. Its release of ChatGPT in November 2022 has been credited with catalyzing widespread interest in generative AI. The organization was founded in 2015 in Delaware but evolved a complex corporate structure. As of October 2025, following restructuring approved by California and Delaware regulators, the non-profit OpenAI Foundation holds 26% of the for-profit OpenAI Group PBC, with Microsoft holding 27% and employees/other investors holding 47%. Under its governance arrangements, the OpenAI Foundation holds the authority to appoint the board of the for-profit OpenAI Group PBC, a mechanism designed to align the entity’s strategic direction with the Foundation’s charter. Microsoft previously invested over $13 billion into OpenAI, and provides Azure cloud computing resources. In October 2025, OpenAI conducted a $6.6 billion share sale that valued the company at $500 billion. In 2023 and 2024, OpenAI faced multiple lawsuits for alleged copyright infringement against authors and media companies whose work was used to train some of OpenAI's products. In November 2023, OpenAI's board removed Sam Altman as CEO, citing a lack of confidence in him, but reinstated him five days later following a reconstruction of the board. Throughout 2024, roughly half of then-employed AI safety researchers left OpenAI, citing the company's prominent role in an industry-wide problem. Founding In December 2015, OpenAI was founded as a not for profit organization by Sam Altman, Elon Musk, Ilya Sutskever, Greg Brockman, Trevor Blackwell, Vicki Cheung, Andrej Karpathy, Durk Kingma, John Schulman, Pamela Vagata, and Wojciech Zaremba, with Sam Altman and Elon Musk as the co-chairs. A total of $1 billion in capital was pledged by Sam Altman, Greg Brockman, Elon Musk, Reid Hoffman, Jessica Livingston, Peter Thiel, Amazon Web Services (AWS), and Infosys. However, the actual capital collected significantly lagged pledges. According to company disclosures, only $130 million had been received by 2019. In its founding charter, OpenAI stated an intention to collaborate openly with other institutions by making certain patents and research publicly available, but later restricted access to its most capable models, citing competitive and safety concerns. OpenAI was initially run from Brockman's living room. It was later headquartered at the Pioneer Building in the Mission District, San Francisco. According to OpenAI's charter, its founding mission is "to ensure that artificial general intelligence (AGI)—by which we mean highly autonomous systems that outperform humans at most economically valuable work—benefits all of humanity." Musk and Altman stated in 2015 that they were partly motivated by concerns about AI safety and existential risk from artificial general intelligence. OpenAI stated that "it's hard to fathom how much human-level AI could benefit society", and that it is equally difficult to comprehend "how much it could damage society if built or used incorrectly". The startup also wrote that AI "should be an extension of individual human wills and, in the spirit of liberty, as broadly and evenly distributed as possible", and that "because of AI's surprising history, it's hard to predict when human-level AI might come within reach. When it does, it'll be important to have a leading research institution which can prioritize a good outcome for all over its own self-interest." Co-chair Sam Altman expected a decades-long project that eventually surpasses human intelligence. Brockman met with Yoshua Bengio, one of the "founding fathers" of deep learning, and drew up a list of great AI researchers. Brockman was able to hire nine of them as the first employees in December 2015. OpenAI did not pay AI researchers salaries comparable to those of Facebook or Google. It also did not pay stock options which AI researchers typically get. Nevertheless, OpenAI spent $7 million on its first 52 employees in 2016. OpenAI's potential and mission drew these researchers to the firm; a Google employee said he was willing to leave Google for OpenAI "partly because of the very strong group of people and, to a very large extent, because of its mission." OpenAI co-founder Wojciech Zaremba stated that he turned down "borderline crazy" offers of two to three times his market value to join OpenAI instead. In April 2016, OpenAI released a public beta of "OpenAI Gym", its platform for reinforcement learning research. Nvidia gifted its first DGX-1 supercomputer to OpenAI in August 2016 to help it train larger and more complex AI models with the capability of reducing processing time from six days to two hours. In December 2016, OpenAI released "Universe", a software platform for measuring and training an AI's general intelligence across the world's supply of games, websites, and other applications. Corporate structure In 2019, OpenAI transitioned from non-profit to "capped" for-profit, with the profit being capped at 100 times any investment. According to OpenAI, the capped-profit model allows OpenAI Global, LLC to legally attract investment from venture funds and, in addition, to grant employees stakes in the company. Many top researchers work for Google Brain, DeepMind, or Facebook, which offer equity that a nonprofit would be unable to match. Before the transition, OpenAI was legally required to publicly disclose the compensation of its top employees. The company then distributed equity to its employees and partnered with Microsoft, announcing an investment package of $1 billion into the company. Since then, OpenAI systems have run on an Azure-based supercomputing platform from Microsoft. OpenAI Global, LLC then announced its intention to commercially license its technologies. It planned to spend $1 billion "within five years, and possibly much faster". Altman stated that even a billion dollars may turn out to be insufficient, and that the lab may ultimately need "more capital than any non-profit has ever raised" to achieve artificial general intelligence. The nonprofit, OpenAI, Inc., is the sole controlling shareholder of OpenAI Global, LLC, which, despite being a for-profit company, retains a formal fiduciary responsibility to OpenAI, Inc.'s nonprofit charter. A majority of OpenAI, Inc.'s board is barred from having financial stakes in OpenAI Global, LLC. In addition, minority members with a stake in OpenAI Global, LLC are barred from certain votes due to conflict of interest. Some researchers have argued that OpenAI Global, LLC's switch to for-profit status is inconsistent with OpenAI's claims to be "democratizing" AI. On February 29, 2024, Elon Musk filed a lawsuit against OpenAI and CEO Sam Altman, accusing them of shifting focus from public benefit to profit maximization—a case OpenAI dismissed as "incoherent" and "frivolous," though Musk later revived legal action against Altman and others in August. On April 9, 2024, OpenAI countersued Musk in federal court, alleging that he had engaged in "bad-faith tactics" to slow the company's progress and seize its innovations for his personal benefit. OpenAI also argued that Musk had previously supported the creation of a for-profit structure and had expressed interest in controlling OpenAI himself. The countersuit seeks damages and legal measures to prevent further alleged interference. On February 10, 2025, a consortium of investors led by Elon Musk submitted a $97.4 billion unsolicited bid to buy the nonprofit that controls OpenAI, declaring willingness to match or exceed any better offer. The offer was rejected on 14 February 2025, with OpenAI stating that it was not for sale, but the offer complicated Altman's restructuring plan by suggesting a lower bar for how much the nonprofit should be valued. OpenAI, Inc. was originally designed as a nonprofit in order to ensure that AGI "benefits all of humanity" rather than "the private gain of any person". In 2019, it created OpenAI Global, LLC, a capped-profit subsidiary controlled by the nonprofit. In December 2024, OpenAI proposed a restructuring plan to convert the capped-profit into a Delaware-based public benefit corporation (PBC), and to release it from the control of the nonprofit. The nonprofit would sell its control and other assets, getting equity in return, and would use it to fund and pursue separate charitable projects, including in science and education. OpenAI's leadership described the change as necessary to secure additional investments, and claimed that the nonprofit's founding mission to ensure AGI "benefits all of humanity" would be better fulfilled. The plan has been criticized by former employees. A legal letter named "Not For Private Gain" asked the attorneys general of California and Delaware to intervene, stating that the restructuring is illegal and would remove governance safeguards from the nonprofit and the attorneys general. The letter argues that OpenAI's complex structure was deliberately designed to remain accountable to its mission, without the conflicting pressure of maximizing profits. It contends that the nonprofit is best positioned to advance its mission of ensuring AGI benefits all of humanity by continuing to control OpenAI Global, LLC, whatever the amount of equity that it could get in exchange. PBCs can choose how they balance their mission with profit-making. Controlling shareholders have a large influence on how closely a PBC sticks to its mission. On October 28, 2025, OpenAI announced that it had adopted the new PBC corporate structure after receiving approval from the attorneys general of California and Delaware. Under the new structure, OpenAI's for-profit branch became a public benefit corporation known as OpenAI Group PBC, while the non-profit was renamed to the OpenAI Foundation. The OpenAI Foundation holds a 26% stake in the PBC, while Microsoft holds a 27% stake and the remaining 47% is owned by employees and other investors. All members of the OpenAI Group PBC board of directors will be appointed by the OpenAI Foundation, which can remove them at any time. Members of the Foundation's board will also serve on the for-profit board. The new structure allows the for-profit PBC to raise investor funds like most traditional tech companies, including through an initial public offering, which Altman claimed was the most likely path forward. In January 2023, OpenAI Global, LLC was in talks for funding that would value the company at $29 billion, double its 2021 value. On January 23, 2023, Microsoft announced a new US$10 billion investment in OpenAI Global, LLC over multiple years, partially needed to use Microsoft's cloud-computing service Azure. From September to December, 2023, Microsoft rebranded all variants of its Copilot to Microsoft Copilot, and they added MS-Copilot to many installations of Windows and released Microsoft Copilot mobile apps. Following OpenAI's 2025 restructuring, Microsoft owns a 27% stake in the for-profit OpenAI Group PBC, valued at $135 billion. In a deal announced the same day, OpenAI agreed to purchase $250 billion of Azure services, with Microsoft ceding their right of first refusal over OpenAI's future cloud computing purchases. As part of the deal, OpenAI will continue to share 20% of its revenue with Microsoft until it achieves AGI, which must now be verified by an independent panel of experts. The deal also loosened restrictions on both companies working with third parties, allowing Microsoft to pursue AGI independently and allowing OpenAI to develop products with other companies. In 2017, OpenAI spent $7.9 million, a quarter of its functional expenses, on cloud computing alone. In comparison, DeepMind's total expenses in 2017 were $442 million. In the summer of 2018, training OpenAI's Dota 2 bots required renting 128,000 CPUs and 256 GPUs from Google for multiple weeks. In October 2024, OpenAI completed a $6.6 billion capital raise with a $157 billion valuation including investments from Microsoft, Nvidia, and SoftBank. On January 21, 2025, Donald Trump announced The Stargate Project, a joint venture between OpenAI, Oracle, SoftBank and MGX to build an AI infrastructure system in conjunction with the US government. The project takes its name from OpenAI's existing "Stargate" supercomputer project and is estimated to cost $500 billion. The partners planned to fund the project over the next four years. In July, the United States Department of Defense announced that OpenAI had received a $200 million contract for AI in the military, along with Anthropic, Google, and xAI. In the same month, the company made a deal with the UK Government to use ChatGPT and other AI tools in public services. OpenAI subsequently began a $50 million fund to support nonprofit and community organizations. In April 2025, OpenAI raised $40 billion at a $300 billion post-money valuation, which was the highest-value private technology deal in history. The financing round was led by SoftBank, with other participants including Microsoft, Coatue, Altimeter and Thrive. In July 2025, the company reported annualized revenue of $12 billion. This was an increase from $3.7 billion in 2024, which was driven by ChatGPT subscriptions, which reached 20 million paid subscribers by April 2025, up from 15.5 million at the end of 2024, alongside a rapidly expanding enterprise customer base that grew to five million business users. The company’s cash burn remains high because of the intensive computational costs required to train and operate large language models. It projects an $8 billion operating loss in 2025. OpenAI reports revised long-term spending projections totaling approximately $115 billion through 2029, with annual expenditures projected to escalate significantly, reaching $17 billion in 2026, $35 billion in 2027, and $45 billion in 2028. These expenditures are primarily allocated toward expanding compute infrastructure, developing proprietary AI chips, constructing data centers, and funding intensive model training programs, with more than half of the spending through the end of the decade expected to support research-intensive compute for model training and development. The company's financial strategy prioritizes market expansion and technological advancement over near-term profitability, with OpenAI targeting cash-flow-positive operations by 2029 and projecting revenue of approximately $200 billion by 2030. This aggressive spending trajectory underscores both the enormous capital requirements of scaling cutting-edge AI technology and OpenAI's commitment to maintaining its position as a leader in the artificial intelligence industry. In October 2025, OpenAI completed an employee share sale of up to $10 billion to existing investors which valued the company at $500 billion. The deal values OpenAI as the most valuable privately owned company in the world—surpassing SpaceX as the world's most valuable private company. On November 17, 2023, Sam Altman was removed as CEO when its board of directors (composed of Helen Toner, Ilya Sutskever, Adam D'Angelo and Tasha McCauley) cited a lack of confidence in him. Chief Technology Officer Mira Murati took over as interim CEO. Greg Brockman, the president of OpenAI, was also removed as chairman of the board and resigned from the company's presidency shortly thereafter. Three senior OpenAI researchers subsequently resigned: director of research and GPT-4 lead Jakub Pachocki, head of AI risk Aleksander Mądry, and researcher Szymon Sidor. On November 18, 2023, there were reportedly talks of Altman returning as CEO amid pressure placed upon the board by investors such as Microsoft and Thrive Capital, who objected to Altman's departure. Although Altman himself spoke in favor of returning to OpenAI, he has since stated that he considered starting a new company and bringing former OpenAI employees with him if talks to reinstate him didn't work out. The board members agreed "in principle" to resign if Altman returned. On November 19, 2023, negotiations with Altman to return failed and Murati was replaced by Emmett Shear as interim CEO. The board initially contacted Anthropic CEO Dario Amodei (a former OpenAI executive) about replacing Altman, and proposed a merger of the two companies, but both offers were declined. On November 20, 2023, Microsoft CEO Satya Nadella announced Altman and Brockman would be joining Microsoft to lead a new advanced AI research team, but added that they were still committed to OpenAI despite recent events. Before the partnership with Microsoft was finalized, Altman gave the board another opportunity to negotiate with him. About 738 of OpenAI's 770 employees, including Murati and Sutskever, signed an open letter stating they would quit their jobs and join Microsoft if the board did not rehire Altman and then resign. This prompted OpenAI investors to consider legal action against the board as well. In response, OpenAI management sent an internal memo to employees stating that negotiations with Altman and the board had resumed and would take some time. On November 21, 2023, after continued negotiations, Altman and Brockman returned to the company in their prior roles along with a reconstructed board made up of new members Bret Taylor (as chairman) and Lawrence Summers, with D'Angelo remaining. According to subsequent reporting, shortly before Altman’s firing, some employees raised concerns to the board about how he had handled the safety implications of a recent internal AI capability discovery. On November 29, 2023, OpenAI announced that an anonymous Microsoft employee had joined the board as a non-voting member to observe the company's operations; Microsoft resigned from the board in July 2024. In February 2024, the Securities and Exchange Commission subpoenaed OpenAI's internal communication to determine if Altman's alleged lack of candor misled investors. In 2024, following the temporary removal of Sam Altman and his return, many employees gradually left OpenAI, including most of the original leadership team and a significant number of AI safety researchers. In August 2023, it was announced that OpenAI had acquired the New York-based start-up Global Illumination, a company that deploys AI to develop digital infrastructure and creative tools. In June 2024, OpenAI acquired Multi, a startup focused on remote collaboration. In March 2025, OpenAI reached a deal with CoreWeave to acquire $350 million worth of CoreWeave shares and access to AI infrastructure, in return for $11.9 billion paid over five years. Microsoft was already CoreWeave's biggest customer in 2024. Alongside their other business dealings, OpenAI and Microsoft were renegotiating the terms of their partnership to facilitate a potential future initial public offering by OpenAI, while ensuring Microsoft's continued access to advanced AI models. On May 21, OpenAI announced the $6.5 billion acquisition of io, an AI hardware start-up founded by former Apple designer Jony Ive in 2024. In September 2025, OpenAI agreed to acquire the product testing startup Statsig for $1.1 billion in an all-stock deal and appointed Statsig's founding CEO Vijaye Raji as OpenAI's chief technology officer of applications. The company also announced development of an AI-driven hiring service designed to rival LinkedIn. OpenAI acquired personal finance app Roi in October 2025. In October 2025, OpenAI acquired Software Applications Incorporated, the developer of Sky, a macOS-based natural language interface designed to operate across desktop applications. The Sky team joined OpenAI, and the company announced plans to integrate Sky’s capabilities into ChatGPT. In December 2025, it was announced OpenAI had agreed to acquire Neptune, an AI tooling startup that helps companies track and manage model training, for an undisclosed amount. In January 2026, it was announced OpenAI had acquired healthcare technology startup Torch for approximately $60 million. The acquisition followed the launch of OpenAI’s ChatGPT Health product and was intended to strengthen the company’s medical data and healthcare artificial intelligence capabilities. OpenAI has been criticized for outsourcing the annotation of data sets to Sama, a company based in San Francisco that employed workers in Kenya. These annotations were used to train an AI model to detect toxicity, which could then be used to moderate toxic content, notably from ChatGPT's training data and outputs. However, these pieces of text usually contained detailed descriptions of various types of violence, including sexual violence. The investigation uncovered that OpenAI began sending snippets of data to Sama as early as November 2021. The four Sama employees interviewed by Time described themselves as mentally scarred. OpenAI paid Sama $12.50 per hour of work, and Sama was redistributing the equivalent of between $1.32 and $2.00 per hour post-tax to its annotators. Sama's spokesperson said that the $12.50 was also covering other implicit costs, among which were infrastructure expenses, quality assurance and management. In 2024, OpenAI began collaborating with Broadcom to design a custom AI chip capable of both training and inference, targeted for mass production in 2026 and to be manufactured by TSMC on a 3 nm process node. This initiative intended to reduce OpenAI's dependence on Nvidia GPUs, which are costly and face high demand in the market. In January 2024, Arizona State University purchased ChatGPT Enterprise in OpenAI's first deal with a university. In June 2024, Apple Inc. signed a contract with OpenAI to integrate ChatGPT features into its products as part of its new Apple Intelligence initiative. In June 2025, OpenAI began renting Google Cloud's Tensor Processing Units (TPUs) to support ChatGPT and related services, marking its first meaningful use of non‑Nvidia AI chips. In September 2025, it was revealed that OpenAI signed a contract with Oracle to purchase $300 billion in computing power over the next five years. In September 2025, OpenAI and NVIDIA announced a memorandum of understanding that included a potential deployment of at least 10 gigawatts of NVIDIA systems and a $100 billion investment from NVIDIA in OpenAI. OpenAI expected the negotiations to be completed within weeks. As of January 2026, this has not been realized, and the two sides are rethinking the future of their partnership. In October 2025, OpenAI announced a multi-billion dollar deal with AMD. OpenAI committed to purchasing six gigawatts worth of AMD chips, starting with the MI450. OpenAI will have the option to buy up to 160 million shares of AMD, about 10% of the company, depending on development, performance and share price targets. In December 2025, Disney said it would make a $1 billion investment in OpenAI, and signed a three-year licensing deal that will let users generate videos using Sora—OpenAI's short-form AI video platform. More than 200 Disney, Marvel, Star Wars and Pixar characters will be available to OpenAI users. In early 2026, Amazon entered advanced discussions to invest up to $50 billion in OpenAI as part of a potential artificial intelligence partnership. Under the proposed agreement, OpenAI’s models could be integrated into Amazon’s digital assistant Alexa and other internal projects. OpenAI provides LLMs to the Artificial Intelligence Cyber Challenge and to the Advanced Research Projects Agency for Health. In October 2024, The Intercept revealed that OpenAI's tools are considered "essential" for AFRICOM's mission and included in an "Exception to Fair Opportunity" contractual agreement between the United States Department of Defense and Microsoft. In December 2024, OpenAI said it would partner with defense-tech company Anduril to build drone defense technologies for the United States and its allies. In 2025, OpenAI's Chief Product Officer, Kevin Weil, was commissioned lieutenant colonel in the U.S. Army to join Detachment 201 as senior advisor. In June 2025, the U.S. Department of Defense awarded OpenAI a $200 million one-year contract to develop AI tools for military and national security applications. OpenAI announced a new program, OpenAI for Government, to give federal, state, and local governments access to its models, including ChatGPT. Services In February 2019, GPT-2 was announced, which gained attention for its ability to generate human-like text. In 2020, OpenAI announced GPT-3, a language model trained on large internet datasets. GPT-3 is aimed at natural language answering questions, but it can also translate between languages and coherently generate improvised text. It also announced that an associated API, named the API, would form the heart of its first commercial product. Eleven employees left OpenAI, mostly between December 2020 and January 2021, in order to establish Anthropic. In 2021, OpenAI introduced DALL-E, a specialized deep learning model adept at generating complex digital images from textual descriptions, utilizing a variant of the GPT-3 architecture. In December 2022, OpenAI received widespread media coverage after launching a free preview of ChatGPT, its new AI chatbot based on GPT-3.5. According to OpenAI, the preview received over a million signups within the first five days. According to anonymous sources cited by Reuters in December 2022, OpenAI Global, LLC was projecting $200 million of revenue in 2023 and $1 billion in revenue in 2024. After ChatGPT was launched, Google announced a similar chatbot, Bard, amid internal concerns that ChatGPT could threaten Google’s position as a primary source of online information. On February 7, 2023, Microsoft announced that it was building AI technology based on the same foundation as ChatGPT into Microsoft Bing, Edge, Microsoft 365 and other products. On March 14, 2023, OpenAI released GPT-4, both as an API (with a waitlist) and as a feature of ChatGPT Plus. On November 6, 2023, OpenAI launched GPTs, allowing individuals to create customized versions of ChatGPT for specific purposes, further expanding the possibilities of AI applications across various industries. On November 14, 2023, OpenAI announced they temporarily suspended new sign-ups for ChatGPT Plus due to high demand. Access for newer subscribers re-opened a month later on December 13. In December 2024, the company launched the Sora model. It also launched OpenAI o1, an early reasoning model that was internally codenamed strawberry. Additionally, ChatGPT Pro—a $200/month subscription service offering unlimited o1 access and enhanced voice features—was introduced, and preliminary benchmark results for the upcoming OpenAI o3 models were shared. On January 23, 2025, OpenAI released Operator, an AI agent and web automation tool for accessing websites to execute goals defined by users. The feature was only available to Pro users in the United States. OpenAI released deep research agent, nine days later. It scored a 27% accuracy on the benchmark Humanity's Last Exam (HLE). Altman later stated GPT-4.5 would be the last model without full chain-of-thought reasoning. In July 2025, reports indicated that AI models by both OpenAI and Google DeepMind solved mathematics problems at the level of top-performing students in the International Mathematical Olympiad. OpenAI's large language model was able to achieve gold medal-level performance, reflecting significant progress in AI's reasoning abilities. On October 6, 2025, OpenAI unveiled its Agent Builder platform during the company's DevDay event. The platform includes a visual drag-and-drop interface that lets developers and businesses design, test, and deploy agentic workflows with limited coding. On October 21, 2025, OpenAI introduced ChatGPT Atlas, a browser integrating the ChatGPT assistant directly into web navigation, to compete with existing browsers such as Google Chrome and Apple Safari. On December 11, 2025, OpenAI announced GPT-5.2. This model will be better at creating spreadsheets, building presentations, perceiving images, writing code and understanding long context. On January 27, 2026, OpenAI introduced Prism, a LaTeX-native workspace meant to assist scientists to help with research and writing. The platform utilizes GPT-5.2 as a backend to automate the process of drafting for scientific papers, including features for managing citations, complex equation formatting, and real-time collaborative editing. In March 2023, the company was criticized for disclosing particularly few technical details about products like GPT-4, contradicting its initial commitment to openness and making it harder for independent researchers to replicate its work and develop safeguards. OpenAI cited competitiveness and safety concerns to justify this repudiation. OpenAI's former chief scientist Ilya Sutskever argued in 2023 that open-sourcing increasingly capable models was increasingly risky, and that the safety reasons for not open-sourcing the most potent AI models would become "obvious" in a few years. In September 2025, OpenAI published a study on how people use ChatGPT for everyday tasks. The study found that "non-work tasks" (according to an LLM-based classifier) account for more than 72 percent of all ChatGPT usage, with a minority of overall usage related to business productivity. In July 2023, OpenAI launched the superalignment project, aiming within four years to determine how to align future superintelligent systems. OpenAI promised to dedicate 20% of its computing resources to the project, although the team denied receiving anything close to 20%. OpenAI ended the project in May 2024 after its co-leaders Ilya Sutskever and Jan Leike left the company. In August 2025, OpenAI was criticized after thousands of private ChatGPT conversations were inadvertently exposed to public search engines like Google due to an experimental "share with search engines" feature. The opt-in toggle, intended to allow users to make specific chats discoverable, resulted in some discussions including personal details such as names, locations, and intimate topics appearing in search results when users accidentally enabled it while sharing links. OpenAI announced the feature's permanent removal on August 1, 2025, and the company began coordinating with search providers to remove the exposed content, emphasizing that it was not a security breach but a design flaw that heightened privacy risks. CEO Sam Altman acknowledged the issue in a podcast, noting users often treat ChatGPT as a confidant for deeply personal matters, which amplified concerns about AI handling sensitive data. Management In 2018, Musk resigned from his Board of Directors seat, citing "a potential future conflict [of interest]" with his role as CEO of Tesla due to Tesla's AI development for self-driving cars. OpenAI stated that Musk's financial contributions were below $45 million. On March 3, 2023, Reid Hoffman resigned from his board seat, citing a desire to avoid conflicts of interest with his investments in AI companies via Greylock Partners, and his co-founding of the AI startup Inflection AI. Hoffman remained on the board of Microsoft, a major investor in OpenAI. In May 2024, Chief Scientist Ilya Sutskever resigned and was succeeded by Jakub Pachocki. Co-leader Jan Leike also departed amid concerns over safety and trust. OpenAI then signed deals with Reddit, News Corp, Axios, and Vox Media. Paul Nakasone then joined the board of OpenAI. In August 2024, cofounder John Schulman left OpenAI to join Anthropic, and OpenAI's president Greg Brockman took extended leave until November. In September 2024, CTO Mira Murati left the company. In November 2025, Lawrence Summers resigned from the board of directors. Governance and legal issues In May 2023, Sam Altman, Greg Brockman and Ilya Sutskever posted recommendations for the governance of superintelligence. They stated that superintelligence could happen within the next 10 years, allowing a "dramatically more prosperous future" and that "given the possibility of existential risk, we can't just be reactive". They proposed creating an international watchdog organization similar to IAEA to oversee AI systems above a certain capability threshold, suggesting that relatively weak AI systems on the other side should not be overly regulated. They also called for more technical safety research for superintelligences, and asked for more coordination, for example through governments launching a joint project which "many current efforts become part of". In July 2023, the FTC issued a civil investigative demand to OpenAI to investigate whether the company's data security and privacy practices to develop ChatGPT were unfair or harmed consumers (including by reputational harm) in violation of Section 5 of the Federal Trade Commission Act of 1914. These are typically preliminary investigative matters and are nonpublic, but the FTC's document was leaked. In July 2023, the FTC launched an investigation into OpenAI over allegations that the company scraped public data and published false and defamatory information. They asked OpenAI for comprehensive information about its technology and privacy safeguards, as well as any steps taken to prevent the recurrence of situations in which its chatbot generated false and derogatory content about people. The agency also raised concerns about ‘circular’ spending arrangements—for example, Microsoft extending Azure credits to OpenAI while both companies shared engineering talent—and warned that such structures could negatively affect the public. In September 2024, OpenAI's global affairs chief endorsed the UK's "smart" AI regulation during testimony to a House of Lords committee. In February 2025, OpenAI CEO Sam Altman stated that the company is interested in collaborating with the People's Republic of China, despite regulatory restrictions imposed by the U.S. government. This shift comes in response to the growing influence of the Chinese artificial intelligence company DeepSeek, which has disrupted the AI market with open models, including DeepSeek V3 and DeepSeek R1. Following DeepSeek's market emergence, OpenAI enhanced security protocols to protect proprietary development techniques from industrial espionage. Some industry observers noted similarities between DeepSeek's model distillation approach and OpenAI's methodology, though no formal intellectual property claim was filed. According to Oliver Roberts, in March 2025, the United States had 781 state AI bills or laws. OpenAI advocated for preempting state AI laws with federal laws. According to Scott Kohler, OpenAI has opposed California's AI legislation and suggested that the state bill encroaches on a more competent federal government. Public Citizen opposed a federal preemption on AI and pointed to OpenAI's growth and valuation as evidence that existing state laws have not hampered innovation. Before May 2024, OpenAI required departing employees to sign a lifelong non-disparagement agreement forbidding them from criticizing OpenAI and acknowledging the existence of the agreement. Daniel Kokotajlo, a former employee, publicly stated that he forfeited his vested equity in OpenAI in order to leave without signing the agreement. Sam Altman stated that he was unaware of the equity cancellation provision, and that OpenAI never enforced it to cancel any employee's vested equity. However, leaked documents and emails refute this claim. On May 23, 2024, OpenAI sent a memo releasing former employees from the agreement. OpenAI was sued for copyright infringement by authors Sarah Silverman, Matthew Butterick, Paul Tremblay and Mona Awad in July 2023. In September 2023, 17 authors, including George R. R. Martin, John Grisham, Jodi Picoult and Jonathan Franzen, joined the Authors Guild in filing a class action lawsuit against OpenAI, alleging that the company's technology was illegally using their copyrighted work. The New York Times also sued the company in late December 2023. In May 2024 it was revealed that OpenAI had destroyed its Books1 and Books2 training datasets, which were used in the training of GPT-3, and which the Authors Guild believed to have contained over 100,000 copyrighted books. In 2021, OpenAI developed a speech recognition tool called Whisper. OpenAI used it to transcribe more than one million hours of YouTube videos into text for training GPT-4. The automated transcription of YouTube videos raised concerns within OpenAI employees regarding potential violations of YouTube's terms of service, which prohibit the use of videos for applications independent of the platform, as well as any type of automated access to its videos. Despite these concerns, the project proceeded with notable involvement from OpenAI's president, Greg Brockman. The resulting dataset proved instrumental in training GPT-4. In February 2024, The Intercept as well as Raw Story and Alternate Media Inc. filed lawsuit against OpenAI on copyright litigation ground. The lawsuit is said to have charted a new legal strategy for digital-only publishers to sue OpenAI. On April 30, 2024, eight newspapers filed a lawsuit in the Southern District of New York against OpenAI and Microsoft, claiming illegal harvesting of their copyrighted articles. The suing publications included The Mercury News, The Denver Post, The Orange County Register, St. Paul Pioneer Press, Chicago Tribune, Orlando Sentinel, Sun Sentinel, and New York Daily News. In June 2023, a lawsuit claimed that OpenAI scraped 300 billion words online without consent and without registering as a data broker. It was filed in San Francisco, California, by sixteen anonymous plaintiffs. They also claimed that OpenAI and its partner as well as customer Microsoft continued to unlawfully collect and use personal data from millions of consumers worldwide to train artificial intelligence models. On May 22, 2024, OpenAI entered into an agreement with News Corp to integrate news content from The Wall Street Journal, the New York Post, The Times, and The Sunday Times into its AI platform. Meanwhile, other publications like The New York Times chose to sue OpenAI and Microsoft for copyright infringement over the use of their content to train AI models. In November 2024, a coalition of Canadian news outlets, including the Toronto Star, Metroland Media, Postmedia, The Globe and Mail, The Canadian Press and CBC, sued OpenAI for using their news articles to train its software without permission. In October 2024 during a New York Times interview, Suchir Balaji accused OpenAI of violating copyright law in developing its commercial LLMs which he had helped engineer. He was a likely witness in a major copyright trial against the AI company, and was one of several of its current or former employees named in court filings as potentially having documents relevant to the case. On November 26, 2024, Balaji died by suicide. His death prompted the circulation of conspiracy theories alleging that he had been deliberately silenced. California Congressman Ro Khanna endorsed calls for an investigation. On April 24, 2025, Ziff Davis sued OpenAI in Delaware federal court for copyright infringement. Ziff Davis is known for publications such as ZDNet, PCMag, CNET, IGN and Lifehacker. In April 2023, the EU's European Data Protection Board (EDPB) formed a dedicated task force on ChatGPT "to foster cooperation and to exchange information on possible enforcement actions conducted by data protection authorities" based on the "enforcement action undertaken by the Italian data protection authority against OpenAI about the ChatGPT service". In late April 2024 NOYB filed a complaint with the Austrian Datenschutzbehörde against OpenAI for violating the European General Data Protection Regulation. A text created with ChatGPT gave a false date of birth for a living person without giving the individual the option to see the personal data used in the process. A request to correct the mistake was denied. Additionally, neither the recipients of ChatGPT's work nor the sources used, could be made available, OpenAI claimed. OpenAI was criticized for lifting its ban on using ChatGPT for "military and warfare". Up until January 10, 2024, its "usage policies" included a ban on "activity that has high risk of physical harm, including", specifically, "weapons development" and "military and warfare". Its new policies prohibit "[using] our service to harm yourself or others" and to "develop or use weapons". In August 2025, the parents of a 16-year-old boy who died by suicide filed a wrongful death lawsuit against OpenAI (and CEO Sam Altman), alleging that months of conversations with ChatGPT about mental health and methods of self-harm contributed to their son's death and that safeguards were inadequate for minors. OpenAI expressed condolences and said it was strengthening protections (including updated crisis response behavior and parental controls). Coverage described it as a first-of-its-kind wrongful death case targeting the company's chatbot. The complaint was filed in California state court in San Francisco. In November 2025, the Social Media Victims Law Center and Tech Justice Law Project filed seven lawsuits against OpenAI, of which four lawsuits alleged wrongful death. The suits were filed on behalf of Zane Shamblin, 23, of Texas; Amaurie Lacey, 17, of Georgia; Joshua Enneking, 26, of Florida; and Joe Ceccanti, 48, of Oregon, who each committed suicide after prolonged ChatGPT usage. In December 2025, Stein-Erik Soelberg, who was 56 years old at the time, allegedly murdered his mother Suzanne Adams. In the months prior the paranoid, delusional man often discussed his ideas with ChatGPT. Adam's estate then sued OpenAI claiming that the company shared responsibility due to the risk of chatbot psychosis despite the fact that chatbot psychosis is not a real medical diagnosis. OpenAI responded saying they will make ChatGPT safer for users disconnected from reality. See also References Further reading External links
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[SOURCE: https://en.wikipedia.org/wiki/Manchester_Baby] \| [TOKENS: 3634]
Contents Manchester Baby The Manchester Baby, also called the Small-Scale Experimental Machine (SSEM), was the first electronic stored-program computer. It was built at the Victoria University of Manchester by Frederic C. Williams, Tom Kilburn, and Geoff Tootill, and ran its first program on 21 June 1948. The Baby was not intended to be a practical computing engine, but was instead designed as a testbed for the Williams tube, the first truly random-access memory. Described as "small and primitive" 50 years after its creation, it was the first working machine to contain all the elements essential to a modern electronic digital computer. As soon as the Baby had demonstrated the feasibility of its design, a project was initiated at the university to develop it into a full-scale operational machine, the Manchester Mark 1. The Mark 1 in turn quickly became the prototype for the Ferranti Mark 1, the world's first commercially available general-purpose computer. The Baby had a 32-bit word length and a memory of 32 words (1 kibibit, 1,024 bits). As it was designed to be the simplest possible stored-program computer, the only arithmetic operations implemented in hardware were subtraction and negation; other arithmetic operations were implemented in software. The first of three programs written for the machine calculated the highest proper divisor of 218 (262,144), by testing every integer from 218 downwards. This algorithm would take a long time to execute—and so prove the computer's reliability, as division was implemented by repeated subtraction of the divisor. The program consisted of 17 instructions and ran for about 52 minutes before reaching the correct answer of 131,072, after the Baby had performed about 3.5 million operations (for an effective CPU speed of about 1100 instructions per second). Background The first design for a program-controlled computer was Charles Babbage's Analytical Engine in the 1830s, with Ada Lovelace conceiving the idea of the first theoretical program to calculate Bernoulli numbers. A century later, in 1936, mathematician Alan Turing published his description of what became known as a Turing machine, a theoretical concept intended to explore the limits of mechanical computation. Turing was not imagining a physical machine, but a person he called a "computer", who acted according to the instructions provided by a tape on which symbols could be read and written sequentially as the tape moved under a tape head. Turing proved that if an algorithm can be written to solve a mathematical problem, then a Turing machine can execute that algorithm. Konrad Zuse's Z3 was the world's first working programmable, fully automatic computer, with binary digital arithmetic logic, but it lacked the conditional branching of a Turing machine. On 12 May 1941, the Z3 was successfully presented to an audience of scientists of the Deutsche Versuchsanstalt für Luftfahrt ("German Laboratory for Aviation") in Berlin. The Z3 stored its program on an external tape, but it was electromechanical rather than electronic. The earliest electronic computing devices were the Atanasoff–Berry computer (ABC), which was successfully tested in 1942, and the Colossus of 1943, but neither was a stored-program machine. The ENIAC (1946) was the first automatic computer that was both electronic and general-purpose. It was Turing complete, with conditional branching, and programmable to solve a wide range of problems, but its program was held in the state of switches in patch cords, rather than machine-changeable memory, and it could take several days to reprogram. Researchers such as Turing and Zuse investigated the idea of using the computer's memory to hold the program as well as the data it was working on, and it was mathematician John von Neumann who wrote a widely distributed paper describing that computer architecture, still used in almost all computers. The construction of a von Neumann computer depended on the availability of a suitable memory device on which to store the program. During the Second World War researchers working on the problem of removing the clutter from radar signals had developed a form of delay-line memory, the first practical application of which was the mercury delay line, developed by J. Presper Eckert. Radar transmitters send out regular brief pulses of radio energy, the reflections from which are displayed on a CRT screen. As operators are usually interested only in moving targets, it was desirable to filter out any distracting reflections from stationary objects. The filtering was achieved by comparing each received pulse with the previous pulse, and rejecting both if they were identical, leaving a signal containing only the images of any moving objects. To store each received pulse for later comparison it was passed through a transmission line, delaying it by exactly the time between transmitted pulses. Turing joined the National Physical Laboratory (NPL) in October 1945, by which time scientists within the Ministry of Supply had concluded that Britain needed a National Mathematical Laboratory to co-ordinate machine-aided computation. A Mathematics Division was set up at the NPL, and on 19 February 1946 Turing presented a paper outlining his design for an electronic stored-program computer to be known as the Automatic Computing Engine (ACE). This was one of several projects set up in the years following the Second World War with the aim of constructing a stored-program computer. At about the same time, EDVAC was under development at the University of Pennsylvania's Moore School of Electrical Engineering, and the University of Cambridge Mathematical Laboratory was working on EDSAC. The NPL did not have the expertise to build a machine like ACE, so they contacted Tommy Flowers at the General Post Office's (GPO) Dollis Hill Research Laboratory. Flowers, the designer of Colossus, the world's first programmable electronic computer, was committed elsewhere and was unable to take part in the project, although his team did build some mercury delay lines for ACE. The Telecommunications Research Establishment (TRE) was also approached for assistance, as was Maurice Wilkes at the University of Cambridge Mathematical Laboratory. The government department responsible for the NPL decided that, of all the work being carried out by the TRE on its behalf, ACE was to be given the top priority. NPL's decision led to a visit by the superintendent of the TRE's Physics Division on 22 November 1946, accompanied by Frederic C. Williams and A. M. Uttley, also from the TRE. Williams led a TRE development group working on CRT stores for radar applications, as an alternative to delay lines. Williams was not available to work on the ACE because he had already accepted a professorship at the Victoria University of Manchester, and most of his circuit technicians were in the process of being transferred to the Department of Atomic Energy. The TRE agreed to second a small number of technicians to work under Williams' direction at the university, and to support another small group working with Uttley at the TRE. Williams–Kilburn tube Although some early computers such as EDSAC, inspired by the design of EDVAC, later made successful use of mercury delay-line memory, the technology had several drawbacks: it was heavy, it was expensive, and it did not allow data to be accessed randomly. In addition, because data was stored as a sequence of acoustic waves propagated through a mercury column, the device's temperature had to be very carefully controlled, as the velocity of sound through a medium varies with its temperature. Williams had seen an experiment at Bell Labs demonstrating the effectiveness of cathode-ray tubes (CRT) as an alternative to the delay line for removing ground echoes from radar signals. While working at the TRE, shortly before he joined the University of Manchester in December 1946, he and Tom Kilburn had developed a form of electronic memory known as the Williams tube or Williams–Kilburn tube, based on a standard CRT: the first electronic random-access digital storage device. The Baby was designed to show that it was a practical storage device by demonstrating that data held within it could be read and written reliably at a speed suitable for use in a computer. For use in a binary digital computer, the tube had to be capable of storing either one of two states at each of its memory locations, corresponding to the binary digits (bits) 0 and 1. It exploited the positive or negative electric charge generated by displaying either a dash or a dot at any position on the CRT screen, a phenomenon known as secondary emission. A dash generated a positive charge, and a dot a negative charge, either of which could be picked up by a detector plate in front of the screen; a negative charge represented 0, and a positive charge 1. The charge dissipated in about 0.2 seconds, but it could be automatically refreshed from the data picked up by the detector. The Williams tube used in Baby was based on the CV1131, a commercially available 12-inch (300 mm) diameter CRT, but a smaller 6-inch (150 mm) tube, the CV1097, was used in the Mark I. Genesis of the project After developing the Colossus computer for code breaking at Bletchley Park during World War II, Max Newman was committed to the development of a computer incorporating both Alan Turing's mathematical concepts and the stored-program concept that had been described by John von Neumann. In 1945, he was appointed to the Fielden Chair of Pure Mathematics at Manchester University; he took his Colossus-project colleagues Jack Good and David Rees to Manchester with him, and there they recruited F. C. Williams to be the "circuit man" for a new computer project for which he had secured funding from the Royal Society. Having secured the support of the university, obtained funding from the Royal Society, and assembled a first-rate team of mathematicians and engineers, Newman now had all elements of his computer-building plan in place. Adopting the approach he had used so effectively at Bletchley Park, Newman set his people loose on the detailed work while he concentrated on orchestrating the endeavor. — David Anderson, historian Following his appointment to the Chair of Electrical Engineering at Manchester University, Williams recruited his TRE colleague Tom Kilburn on secondment. By the autumn of 1947 the pair had increased the storage capacity of the Williams tube from one bit to 2,048, arranged in a 64 by 32-bit array, and demonstrated that it was able to store those bits for four hours. Engineer Geoff Tootill joined the team on loan from TRE in September 1947, and remained on secondment until April 1949. Now let's be clear before we go any further that neither Tom Kilburn nor I knew the first thing about computers when we arrived at Manchester University ... Newman explained the whole business of how a computer works to us. — Frederic Calland Williams Kilburn had a hard time recalling the influences on his machine design: [I]n that period, somehow or other I knew what a digital computer was ... Where I got this knowledge from I've no idea. — Tom Kilburn Jack Copeland explains that Kilburn's first (pre-Baby) accumulator-free (decentralized, in Jack Good's nomenclature) design was based on inputs from Turing, but that he later switched to an accumulator-based (centralized) machine of the sort advocated by von Neumann, as written up and taught to him by Jack Good and Max Newman. The Baby's seven operation instruction set was approximately a subset of the twelve operation instruction set proposed in 1947 by Jack Good, in the first known document to use the term "Baby" for this machine. Good did not include a "halt" instruction, and his proposed conditional jump instruction was more complicated than what the Baby implemented. Development and design Although Newman played no engineering role in the development of the Baby, or any of the subsequent Manchester computers, he was generally supportive and enthusiastic about the project, and arranged for the acquisition of war-surplus supplies for its construction, including GPO metal racks and "...the material of two complete Colossi" from Bletchley. The construction of the Manchester Baby began in December 1947, when the CRT memory produced static pictures. The group needed to check that they could be changed and properly recorded at electronic speeds. Racks and Colossi parts were modified and assembled into chassis by Norman Stanley Hammond and others. By June 1948 the Baby had been built and was working. It was 17 feet (5.2 m) in length, 7 feet 4 inches (2.24 m) tall, and weighed almost 1 long ton (1.0 t). The machine contained 550 valves (vacuum tubes)—300 diodes and 250 pentodes—and had a power consumption of 3500 watts. The arithmetic unit was built using EF50 pentode valves, which had been widely used during wartime. The Baby used one Williams tube to provide 32 by 32-bit words of random-access memory (RAM), a second to hold a 32-bit accumulator in which the intermediate results of a calculation could be stored temporarily, and a third to hold the current program instruction along with its address in memory. A fourth CRT, without the storage electronics of the other three, was used as the output device, able to display the bit pattern of any selected storage tube. Each 32-bit word of RAM could contain either a program instruction or data. In a program instruction, bits 0–12 represented the memory address of the operand to be used, and bits 13–15 specified the operation to be executed, such as storing a number in memory; the remaining 16 bits were unused. The Baby's single operand architecture meant that the second operand of any operation was implicit: the accumulator or the program counter (instruction address); program instructions specified only the address of the data in memory. A word in the computer's memory could be read, written, or refreshed, in 360 microseconds. An instruction took four times as long to execute as accessing a word from memory, giving an instruction execution rate of about 700 per second. The main store was refreshed continuously, a process that took 20 milliseconds to complete, as each of the Baby's 32 words had to be read and then refreshed in sequence. The Baby represented negative numbers using two's complement, as most computers still do. In that representation, the value of the most significant bit denotes the sign of a number; positive numbers have a zero in that position and negative numbers a one. Thus, the range of numbers that could be held in each 32-bit word was −231 to +231 − 1 (decimal: −2,147,483,648 to +2,147,483,647). Programming The Baby's instruction format had a three-bit operation code field, which allowed a maximum of eight (23) different instructions. In contrast to the modern convention, the machine's storage was described with the least significant digits to the left; thus a one was represented in three bits as "100", rather than the more conventional "001". The awkward negative operations were a consequence of the Baby's lack of hardware to perform any arithmetic operations except subtraction and negation. It was considered unnecessary to build an adder before testing could begin as addition can easily be implemented by subtraction, i.e. x+y can be computed as −(−x−y). Therefore, adding two numbers together, X and Y, required four instructions: Programs were entered in binary form by stepping through each word of memory in turn, and using a set of 32 buttons and switches known as the input device to set the value of each bit of each word to either 0 or 1. The Baby had no paper-tape reader or punch. Three programs were written for the computer. The first, consisting of 17 instructions, was written by Kilburn, and so far as can be ascertained first ran on 21 June 1948. It was designed to find the highest proper factor of 218 (262,144) by trying every integer from 218 − 1 downwards. The divisions were implemented by repeated subtractions of the divisor. The Baby took 3.5 million operations and 52 minutes to produce the answer (131,072). The program used eight words of working storage in addition to its 17 words of instructions, giving a program size of 25 words. Geoff Tootill wrote an amended version of the program the following month, and in mid-July Alan Turing—who had been appointed as a reader in the mathematics department at Manchester University in September 1948—submitted the third program, to carry out long division. Turing had by then been appointed to the nominal post of Deputy Director of the Computing Machine Laboratory at the university, although the laboratory did not become a physical reality until 1951. Later developments Williams and Kilburn reported on the Baby in a letter to the Journal Nature, published in September 1948. The machine's successful demonstration quickly led to the construction of a more practical computer, the Manchester Mark 1, work on which began in August 1948. The first version was operational by April 1949, and it in turn led directly to the development of the Ferranti Mark 1, the world's first commercially available general-purpose computer. Legacy In 1998, a working replica of the Baby, now on display at the Museum of Science and Industry in Manchester, was built to celebrate the 50th anniversary of the running of its first program. Demonstrations of the machine in operation are held regularly at the museum. In 2008, an original panoramic photograph of the entire machine was discovered at the University of Manchester. The photograph, taken on 15 December 1948 by a research student, Alec Robinson, had been reproduced in The Illustrated London News in June 1949. References Further reading External links
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[SOURCE: https://en.wikipedia.org/wiki/Bahraini_dinar] \| [TOKENS: 1415]
Contents Bahraini dinar The dinar (Arabic: دينار بحريني‎ Dīnār Baḥrēnī) (sign: .د.ب‎ or BD; code: BHD) is the currency of Bahrain. It is divided into 1000 fils (فلس‎). The Bahraini dinar is abbreviated د.ب‎ (Arabic) or BD (Latin). It is usually represented with three decimal places denoting the fils. The name dinar derives from the Roman denarius. As of December 2021, the Bahraini dinar is the second highest-valued currency unit after the Kuwaiti dinar, at 2.65 United States dollars per unit. History The Bahraini dinar was introduced in 1965, replacing the Gulf rupee at a rate of 10 rupees = 1 dinar = 15 shillings (3⁄4 pound) sterling. Bahrain did not follow India's devaluation of the rupee in 1966 or sterling's devaluation in 1967. Bahraini coins and notes were introduced at that time. Initially, Abu Dhabi adopted the Bahraini dinar but changed to the dirham in 1973, with 1 dirham = 100 fils = 0.100 dinar. Exchange rate In December 1980, the dinar was officially pegged to the IMF's special drawing rights (SDRs). In practice, it is fixed at $1 USD = 0.376 BHD, which translates to approximately 1 BHD = US$2.65957 and, consequently, just over 9.9734 Saudi Arabian riyals. This rate was made official in 2001 via Decree (48) Article 1, and Saudi riyals are accepted at all points of sale in Bahrain at 10 to 1, with the exception of the Saudi 500 riyal note which is only accepted in major supermarkets, airports and electronic shops. Before Malta's adoption of the euro on 1 January 2008, it was the third-highest-valued currency unit after the Kuwaiti dinar and Maltese lira. After Malta adopted the euro, the dinar became the second highest-valued currency unit. Note: Rates obtained from these websites may contradict with pegged rate mentioned above Coins In 1965, coins were introduced in denominations of 1, 5, 10, 25, 50 and 100 fils. The 1, 5 and 10 fils were struck in bronze, with the others in cupro-nickel. The 1 fils coin was not produced after 1966 and no longer circulates. A bimetallic 100 fils coin was introduced in October 1992. In 1992, brass replaced bronze in the 5 and 10 fils. A bimetallic 500 fils coin was released in 2000 with the Pearl Monument on the obverse. It was minted only until 2002 but continued to circulate. In response to the uprising in Bahrain, which resulted in the demolition of the monument on 18 March 2011, the 500 fils coin started to gradually disappear from circulation as it was no longer released back into circulation after reaching banks. The coins remain legal tender. For a wider history surrounding currency in the region, see British currency in the Middle East. Banknotes On 16 October 1965 the Bahrain Currency Board introduced notes in denominations of 1⁄4, 1⁄2, 1, 5 and 10 dinars; a 100-fils note was introduced on September 2, 1967. In 1973, the Bahrain Monetary Agency took over the issuance of paper money, and starting in July 1978 with a 20 dinar note, it introduced a new family of notes dated 1973 in Arabic. Denominations of 1⁄2, 1, 5 and 10 dinars were released on 16 December 1979. The 100-fils note of the Bahrain Currency Board was withdrawn in November 1980 and the remainder of the notes were withdrawn on 31 March 1996, remaining exchangeable until one year afterwards. The third issue of notes (the second by the Bahrain Monetary Agency) with the same denominations of 1⁄2 to 20 dinars was released in March 1993. This series was upgraded during 1998 with various modifications to colour and security features. However, a fake order for banknotes had recently been placed with the Argentinian printer Ciccone Calcografica who did not verify it with the legitimate authorities in Bahrain and obtained genuine banknote paper from Arjo Wiggins to print over 7 million unauthorised replicas of the 20-dinar note (of the 1993 design), equivalent to US$365 million. These differed from genuine notes in two respects: different background shading to the Arabic name of the Bahrain Monetary Agency, and a large gap between the two Arabic letters in the horizontal serial number. These unauthorised notes were smuggled through various African and European countries by air and presented for exchange in Belgium, Switzerland and the Gulf around June 1998, just as the upgraded 20-dinar note was being released in Bahrain. The large amounts raised suspicions and were soon detected as notes that had not been printed by the authorised printer, De La Rue. The Bahrain Monetary Agency allowed individuals who had mistakenly accepted the unauthorised notes to exchange them for face value at banks between 8–14 June 1998, then quickly recalled all 20-dinar notes on 30 July 1998. The unauthorised notes, being replicas of the 1993 design, were in purple and without a hologram. Despite this the upgraded June 1998 notes, also in purple but with a hologram were also withdrawn. On 1 August 1998 a new 20-dinar note, of the same design as the upgraded note (with a hologram) but in peach colour, was released. Thus, the genuine June 1998 design was only in circulation for about 7 weeks and is therefore rarely seen by collectors. All other banknotes of the Bahrain Monetary Agency remain exchangeable. On 7 September 2006, the Bahrain Monetary Agency was renamed the Central Bank of Bahrain. On 17 March 2008, the Central Bank of Bahrain introduced its first series of notes (Bahrain's 4th series) reflecting the country's heritage as well as its modern development. On 4 September 2016, the Central Bank of Bahrain introduced upgraded versions of the 10- and 20-dinar notes with enhanced security features (SPARK and Motion thread) and tactile lines added at center right front for the visually impaired. See also References External links
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[SOURCE: https://en.wikipedia.org/wiki/Manama] \| [TOKENS: 5892]
Contents Manama Manama (Arabic: الْمَنَامَة al-Manāma, Bahrani pronunciation: [elmɐˈnɑːmɐ]) is the capital and largest city of Bahrain, with an approximate population of 743,066 as of 2025 estimate. Long an important trading center in the Persian Gulf, Manama is home to a diverse population. After periods of Portuguese and Persian control and a short invasion from the ruling dynasty of Saudi Arabia, followed by a longer invasion by Oman, Bahrain established itself as an independent nation in 1971 following a period of British hegemony. Manama has a history spanning several centuries. First mentioned in Islamic texts as early as the 14th century, Manama remained a small trading port until it came under Portuguese control in the early 1500s. In 1602, the Safavid Persians expelled the Portuguese, and Manama became a regional center for commerce and pearling. By the late 19th century, it had grown significantly due to trade and was declared the capital of Bahrain in 1971 when the country gained independence from British protection. Since then, Manama has evolved into a modern financial hub in the Persian Gulf region. Manama is situated on the northeastern coast of Bahrain Island, along the Persian Gulf. The city lies on low-lying terrain, with reclaimed land extending its coastline in recent decades due to rapid urban and economic development. Manama's coastal location has historically made it a vital port and trading point in the Gulf. The city has a desert climate, characterized by extremely hot summers, mild winters, and very low annual rainfall. Urban development has spread along the coast, with modern infrastructure, financial districts, and residential areas expanding into the desert outskirts and offshore artificial islands. Although the current twin cities of Manama and Muharraq appear to have been founded simultaneously in the 1800s, Muharraq took prominence due to its defensive location and was thus the capital of Bahrain until 1923. Manama became the mercantile capital and was the gateway to the main Bahrain Island. In the 20th century, Bahrain's oil wealth helped spur fast growth and in the 1990s a concerted diversification effort led to expansion in other industries and helped transform Manama into an important financial hub in the Middle East. Manama was designated as the 2012 capital of Arab culture by the Arab League, and a beta global city by the Globalization and World Cities Research Network in 2018. Etymology The name "Manāmah" (without the Al-) was first recorded around the year 730 AH (approximately 1330 AD) during the visit of Turān Shah of Hurmuz to the island. At that time, it had already been annexed by his predecessor, Tahamtam II of Hurmuz. The name is claimed by some to be derived from the Arabic word الْمَنَامَة (el-Menâme) meaning "the place of rest" or "the place of dreams". Originally it was called simply "Manamah" before being renamed to Al-Manamah. In Persian, "man" (من) means "me," and "nameh" (نامه) means "letter," similar to the structure of words like "Shah Nameh" (Book of Kings). Bahrain’s historical connection with Persian culture, particularly through the Sassanian and Achaemenid Empires, has influenced many place names and cultural elements in the region, supporting the possibility of Persian linguistic roots. Additionally, cities like Shah Khorah (شاه خورا) in Bahrain reflect this Persian influence. History There is evidence of human settlement on the northern coastline of Bahrain dating back to the Bronze Age. The Dilmun civilisation inhabited the area in 3000 BC, serving as a key regional trading hub between Mesopotamia, Magan and the Indus Valley Civilisation. Approximately 100,000 Dilmun burial mounds were found across the north and central regions of the country, some originating 5,000 years ago. Despite the discovery of the mounds, there is no significant evidence to suggest heavy urbanisation took place during the Dilmun era. It is believed that the majority of the population lived in rural areas, numbering several thousand. Evidence of an ancient large rural population was confirmed by one of Alexander the Great's ship captains, during voyages in the Persian Gulf. A vast system of aqueducts in northern Bahrain helped facilitate ancient horticulture and agriculture. "The capital of Awal... is a town well populated whose environs are fertile and produce corn and dates in abundance." —Al-Idrisi The commercial network of Dilmun lasted for almost 2,000 years, after which the Assyrians took control of the island in 700 BC for more than a century. This was followed by Babylonian and Achaemenid rule, which later gave way to Greek influence during the time of Alexander the Great's conquests. In the first century AD, the Roman writer Pliny the Elder wrote of Tylos, the Hellenic name of Bahrain in the classical era, and its pearls and cotton fields. The island came under the control of the Parthian and Sassanid empires respectively, by which time Nestorian Christianity started to spread in Bahrain. By 410–420 AD, a Nestorian bishopric and monastery was established in Al Dair, on the neighbouring island of Muharraq. Following the conversion of Bahrain to Islam in 628 AD, work on one of the earliest mosques in the region, the Khamis Mosque, began as early as the seventh century AD. During this time, Bahrain was engaged in long distance marine trading, evident from the discovery of Chinese coins dating between 600 and 1200 AD, in Manama. In 1330, under the Jarwanid dynasty, the island became a tributary of the Kingdom of Hormuz. The town of Manama was mentioned by name for the first time in a manuscript dating to 1345 AD. Bahrain, particularly Manama and the nearby settlement of Bilad Al Qadeem, became a centre of Shia scholarship and training for the ulema, it would remain so for centuries. The ulema would help fund pearling expeditions and finance grain production in the rural areas surrounding the city. In 1521, Bahrain fell to the expanding Portuguese Empire in the Persian Gulf, having already defeated Hormuz. The Portuguese consolidated their hold on the island by constructing the Bahrain Fort, on the outskirts of Manama. After numerous revolts and an expanding Safavid empire in Persia, the Portuguese were expelled from Bahrain and the Safavids took control in 1602. The Safavids, sidelining Manama, designated the nearby town of Bilad Al Qadeem as the provincial capital. The town was also the seat of the Persian governor and the Shaikh al-Islam of the islands. The position of Shaikh al-Islam lay under the jurisdiction of the central Safavid government and as such, candidates were carefully vetted by the Isfahan courts. During the Safavid era, the islands continued to be a centre for Twelver Shi'ism scholarship, producing clerics for use in mainland Persia. Additionally, the rich agricultural northern region of Bahrain continued to flourish due to an abundance of date palm farms and orchards. The Portuguese traveler Pedro Teixeira commented on the extensive cultivation of crops like barley and wheat. The opening of Persian markets to Bahraini exports, especially pearls, boosted the islands' export economy. The yearly income of exported Bahraini pearls was 600,000 ducats, collected by around 2,000 pearling dhows. Another factor that contributed to Bahrain's agricultural wealth was the migration of Shia cultivators from Ottoman-occupied Qatif and al-Hasa, fearing religious persecution, in 1537. Sometime after 1736, Nader Shah constructed a fort on the southern outskirts of Manama (likely the Diwan Fort). Persian control over the Persian Gulf waned during the later half of the 18th century. At this time, Bahrain archipelago was a dependency of the emirate of Bushehr, itself a part of Persia. In 1783, the Bani Utbah tribal confederation invaded Bahrain and expelled the resident governor Nasr Al-Madhkur. As a result, the Al Khalifa family became the rulers of the country, and all political relations with Bushehr and Persia/Iran were terminated. Ahmed ibn Muhammad ibn Khalifa (later called Ahmed al-Fateh, lit. "Ahmed the conqueror") become the dynasty's first Hakim of Bahrain. Political instability in the 19th century had disastrous effects on Manama's economy; Invasions by the Omanis in 1800 and by the Wahhabis in 1810–11, in addition to a civil war in 1842 between Bahrain's co-rulers saw the town being a major battleground. The instability paralysed commercial trade in Manama; the town's port was closed, most merchants fled abroad to Kuwait and the Persian coast until hostilities ceased. The English scholar William Gifford Palgrave, on a visit to Manama in 1862, described the town as having a few ruined stone buildings, with a landscape dominated with the huts of poor fishermen and pearl-divers. The Pax Britannica of the 19th century resulted in British consolidation of trade routes, particularly those close to the British Raj. In response to piracy in the Persian Gulf region, the British deployed warships and forced much of the Persian Gulf States at the time (including Bahrain) to sign the General Maritime Treaty of 1820, which prohibited piracy and slavery. In 1861, the Perpetual Truce of Peace and Friendship was signed between Britain and Bahrain, which placed the British in charge of defending Bahrain in exchange for British control over Bahraini foreign affairs. With the ascension of Isa ibn Ali Al Khalifa as the Hakim of Bahrain in 1869, Manama became the centre of British activity in the Persian Gulf, though its interests were initially strictly commercial. Trading recovered fully by 1873 and the country's earnings from pearl exports increased by sevenfold between 1873 and 1900. Representing the British were native agents, usually from minorities such as Persians or Huwala who regularly reported back to British India and the British political residency in Bushehr. The position of native agent was later replaced by a British political agent, following the construction of the British political residency (locally referred to in Arabic: بيت الدولة) in 1900, which further solidified Britain's position in Manama. Following the outbreak of World War I in 1914, the British Raj used Manama as a military base of operations during the Mesopotamian campaign. Prompted by the presence of oil in the region, the British political agency in Bushire concluded an oil agreement with the Hakim to prohibit the exploration and exploitation of oil for a five-year period. In 1919, Bahrain was officially integrated into the British Empire as an overseas imperial territory following the Bahrain order-in-council decree, issued in 1913. The decree gave the resident political agent greater powers and placed Bahrain under the residency of Bushire and therefore under the governance of the British Raj. The British pressured a series of administrative reforms in Bahrain during the 1920s (a move met with opposition from tribal leaders), during which the aging Hakim Isa ibn Ali Al Khalifa was forced to abdicate in favour of his reform-minded son Hamad ibn Isa Al Khalifa. A municipal government was established in Manama in 1919, the Customs office was reorganised in 1923 and placed under the supervision of an English businessman, the pearling industry was later reformed in 1924. Earnings from the customs office would be kept in the newly created state treasury. Civil courts were established for the first time in 1923, followed by the establishment of the Department of Land Registration in 1924. Charles Belgrave, from the Colonial office, was appointed in 1926 by the British to carry on further reforms and manage administration as a financial advisor to the King. He later organised the State Police and was in charge of the Finance and Land departments of the government. In 1927, the country's pearling economy collapsed due to the introduction of Japanese cultured pearls in the world market. It is estimated that between 1929 and 1931, pearling entrepreneurs lost more than two-thirds of their income. Further aggravated by the Great Depression, many leading Bahraini businessmen, shopkeepers, and pearl-divers fell into debt. With the discovery of oil in 1932 and the subsequent production of oil exports in 1934, the country gained a greater significance in geopolitics. The security of oil supplies in the Middle East was a priority of the British, especially in the run-up to the Second World War. The discovery of oil led to gradual employment of bankrupt divers from the pearling industry in the 1930s, eventually causing the pearling industry to disappear. During the war, the country served as a strategic airbase between Britain and India as well as hosting RAF Muharraq and a naval base in Juffair. Bahrain was bombed by the Italian Air Force in 1940. In 1947, following the end of the war and subsequent Indian independence, the British residency of the Persian Gulf moved to Manama from Bushire. Following the rise of Arab nationalism across the Middle East and sparked by the Suez Crisis in 1956, anti-British unrest broke out in Manama, organised by the National Union Committee. Though the NUC advocated peaceful demonstrations, buildings and enterprises belonging to Europeans (the British in particular) as well as the main Catholic church in the city and petrol stations, were targeted and set ablaze. Demonstrations held in front of the British political residency called for the dismissal of Charles Belgrave, who was later dismissed by the direct intervention of the Foreign Office the following year. A subsequent crackdown on the NUC led to the dissolution of the body. Another anti-British uprising erupted in March 1965, though predominately led by students aspiring for independence rather than by Arab nationalists.[a] In 1968, the British announced their withdrawal from Bahrain by 1971. The newly independent State of Bahrain designated Manama as the capital city. Post-independence Manama was characterised by the rapid urbanisation of the city and the swallowing-up of neighboring villages and hamlets into a single urbanised area, incorporating new neighbourhoods such as Adliya and Salmaniya. The construction boom attracted large numbers of foreigners from the Indian subcontinent and by 1981, foreigners outnumbered Bahrainis two-to-one. The construction of the Diplomatic Area district in the city's northeast helped facilitate diversification of the country's economy from oil by exploiting the lucrative financial industry. Financial institutions in the district numbered 187 by 1986. The scarcity of land suitable for construction led to land reclamation. Religious activism migrated from Manama to the suburban districts of Bani Jamra, Diraz and Bilad Al Qadeem, hotspots of unrest in the 1990s uprising that called for the reinstatement of an elected parliament. In 2001, the National Action Charter, presented by King Hamad bin Isa al-Khalifa was approved by Bahrainis. The charter led to the first parliamentary and municipal elections in decades. Further elections in 2006 and 2010 led to the election of Islamist parties, Al Wefaq, Al Menbar, and Al Asalah, as well as independent candidates. In 2011, a month-long uprising led to the intervention of GCC forces and the proclamation of a three-month state of emergency. The Bahrain Independent Commission of Inquiry published a 500-page report on the events of 2011. Government Historically, Manama has been restricted to what is now known as the Manama Souq and the Manama Fort (now the Ministry of Interior) to its south. However the city has now grown to include a number of newer suburban developments as well as older neighboring villages that have been engulfed by the growth of the city. The districts that make up Manama today include: Manama is part of the Capital Governorate, one of five Governorates of Bahrain. Until 2002 it was part of the municipality of Al-Manamah. Councils exist within the governorates; eight constituencies are voted upon within Capital Governorate in 2006. Economy Manama is the focal point of the Bahraini economy. While petroleum has decreased in importance in recent years due to depleting reserves and growth in other industries, it is still the mainstay of the economy. Heavy industry (e.g. aluminium smelting, ship repair), banking and finance, and tourism are among the industries which have experienced recent growth. Several multinationals have facilities and offices in and around Manama. The primary industry in Manama itself is financial services, with over two hundred financial institutions and banks based in the CBD and the Diplomatic Area. Manama is a financial hub for the Persian Gulf region and a center of Islamic banking. There is also a large retail sector in the shopping malls around Seef, while the center of Manama is dominated by small workshops and traders. Manama's economy in the early 20th century relied heavily on pearling; in 1907, the pearling industry was estimated to include 917 boats providing employment for up to 18,000 people. Shipbuilding also employed several hundred in both Manama and Muharraq. The estimated income earned from pearling in 1926 and subsequent years prior to the Great Depression was £1.5 million annually. Custom duties and tariffs served as the prime source of revenue for the government. With the onset of the Great Depression, the collapse of the pearling industry and the discovery of oil in 1932, the country's economy began to shift towards oil. Historically, the ports at Manama were of poor reputation. The British described the ports importing systems as being "very bad – goods were exposed to the weather and there were long delays in delivery", in 1911. Indians began maintaining the ports and new resources were built on site, improving the situation. As of 1920, Manama was one of the main exporters of Bahrain pearls, attracting steamships from India. During this time, they also imported goods from India and from other regional countries. They imported rice, textiles, ghee, coffee, dates, tea, tobacco, fuel, and livestock. They exported less of a variety, with a focus on pearls, oysters, and sailcloth. For the year of 1911–12, Manama was visited by 52 steamships, the majority being British and the rest Turkish-Arabian. Demographics The role of Manama as a regional port city in the Persian Gulf made it a hub for migrant workers in search of a better living. As a result, Manama has often been described, both in the pre-oil and post-oil era, as a cosmopolitan city. In 1904, it was estimated that Manama's population numbered 25,000, out of which half were believed to have been foreigners from Basra, Najd, al-Hasa and Iran, as well as from India and Europe. The two main branches of Islam, Shia Islam and Sunni Islam, coexisted in Manama for centuries and are represented by distinct ethnic groups. The Shia community is represented by the native Arab Baharna, the Hasawis and Qatifis of mainland Arabia and the Persian Ajam. The Sunni community is represented by Arab Bedouin tribes who migrated in the eighteenth century along with the Bani Utbah and the Huwala. Transport Manama is the main hub of the country's road network. At the moment the city's road network is undergoing substantial development to ameliorate the situation of traffic in the city. Due to the fact that it is the capital and the main city in the country, where most of the government and the commercial offices and facilities are established, along with the entertainment centers, and the country's fast growth, vehicle population is increasing rapidly. The widening of roads in the old districts of Manama and the development of a national network linking the capital to other settlements commenced as early as the arrival of the first car in 1914. The continuous increase in the number of cars from 395 in 1944, to 3,379 in 1954 and to 18,372 cars in 1970 caused urban development to primarily focus on expanding the road network, widening carriageways and the establishment of more parking spaces. Many tracks previously laid in the pre-oil era (prior to the 1930s) were resurfaced and widened, turning them into 'road arteries'. Initial widening of the roads started in the Manama Souq district, widening its main roads by demolishing encroaching houses. A series of ring roads were constructed (Isa al Kabeer avenue in the 1930s, Exhibition avenue in the 1960s and Al Fateh highway in the 1980s), to push back the coastline and extend the city area in belt-like forms. To the north, the foreshore used to be around Government Avenue in the 1920s but it shifted to a new road, King Faisal Road, in the early 1930s which became the coastal road. To the east, a bridge connected Manama to Muharraq since 1929, a new causeway was built in 1941 which replaced the old wooden bridge. Transits between the two islands peaked after the construction of the Bahrain International Airport in 1932. To the south of Manama, roads connected groves, lagoons and marshes of Hoora, Adliya, Gudaibiya and Juffair. Villages such as Mahooz, Ghuraifa, Seqaya served as the end of these roads. To the west, a major highway was built that linked Manama to the isolated village port of Budaiya, this highway crossed through the 'green belt' villages of Sanabis, Jidhafs and Duraz. To the south, a road was built that connected Manama to Riffa. The discovery of oil accelerated the growth of the city's road network. The four main islands and all the towns and villages are linked by well-constructed roads. There were 3,164 km (1,966 mi) of roadways in 2002, of which 2,433 km (1,512 mi) were paved. A causeway stretching over 2.8 km (2 mi), connect Manama with Muharraq Island, and another bridge joins Sitra to the main island. A four-lane highway atop a 24 km (15 mi) causeway, linking Bahrain with the Saudi Arabian mainland via the island of Umm an-Nasan was completed in December 1986, and financed by Saudi Arabia. In 2000, there were 172,684 passenger vehicles and 41,820 commercial vehicles. Bahrain's port of Mina Salman can accommodate 16 oceangoing vessels drawing up to 11 m (36 ft). In 2001, Bahrain had a merchant fleet of eight ships of 1,000 GT or over, totaling 270,784 GT. Private vehicles and taxis are the primary means of transportation in the city. Manama has a bus service that launched on 1 April 2015, with a fleet of 141 MAN buses. Regulated by the Ministry of Transportation, bus routes extend across Bahrain and around Manama. Bahrain International Airport is located on the nearby Muharraq Island, approximately 7 km (4 mi) from the Central Business District (CBD). It is a premier hub airport in the Middle East. Strategically located in the Northern Persian Gulf between the major markets of Saudi Arabia and Iran, the airport has one of the widest range and highest frequency of regional services with connections to major international destinations in Europe, Asia, Africa, and North America. Bahrain also has a military airbase, the Isa Air Base, located in the south at Sakhir. This is the base of the Bahrain Defence Force, or BDF. Education Quranic schools were the only source of education in Bahrain prior to the 20th century; such schools were primarily dedicated to the study of the Qur'an. The first modern school to open in the country was a missionary elementary school set up in 1892 (according to one account) in Manama by the Reformed Church in America, with the school's syllabus comprising English, Mathematics and the study of Christianity. Leading merchants in the country sent their children to the school until it was closed down in 1933 due to financial difficulties. The school reopened some years later under the name of Al Raja School where it operates till the present day. In addition to the American Mission School, another foreign private school was opened in 1910; Al-Ittihad school, funded by the Persian community of Bahrain. Following the end of the First World War, Western ideas became more widespread in the country, culminating in the opening of the first public school of Bahrain, Al-Hidaya Al-Khalifia Boys school, in the island of Muharraq in 1919. The school was founded by prominent citizens of Muharraq and was endorsed by the Bahraini royal family. The country's first Education Committee was established by several leading Bahraini merchants, headed by Shaikh Abdulla bin Isa Al-Khalifa, the son of the then-ruler of Bahrain Isa ibn Ali Al Khalifa, who acted as the de facto Minister of Education. The Education Committee was also responsible for managing the Al-Hidaya Boys school. The school was, in fact, the brainchild of Shaikh Abdulla, who suggested the idea after returning from post-World War I celebrations in England. In 1926, a second public school for boys opened up in Manama called the Jafaria School. Two years later, in 1928, the first public school for girls was established. Due to financial constraints suffered by the Education Committee, the Bahraini government took control of the schools in 1930. Presently, Manama has a wide range of private and public universities and colleges such as Ahlia University, Applied Science University, Arab Open University, Arabian Gulf University, Bahrain Institute of Banking and Finance, and the College of Health and Sport Sciences. Other notable primary and secondary schools situated in the city include the Bahrain School, the Indian School, Al Raja School amongst others. Geography The city is located in the north-eastern corner of Bahrain on a small peninsula. As in the rest of Bahrain, the land is generally flat (or gently rolling) and arid. Manama has an arid climate. In common with the rest of Bahrain, Manama experiences extreme climatic conditions, with summer temperatures up to 45 °C (113 °F), and winter as low as 7 °C (45 °F) with even hail on rare occasions. Average temperatures of the summer and winter seasons are generally from about 17 °C (63 °F) to about 34 °C (93 °F). The most pleasant time in Bahrain is spring when sunshine is comparatively low, coupled with mild temperatures moderated by soft breezes. Culture Bahrain attracts a large number of foreigners and foreign influences, with about half of the population hailing from abroad. Alcohol is legal in the country, with bars and nightclubs operating in the city. Bahrain gave women the right to vote in elections for the first time in 2002. Football is the most popular sport in Manama (and the rest of the country), with three teams from Manama participating in the Bahraini Premier League. Notable cultural sites within Manama include the Bab Al Bahrain and the adjacent souq area. In the 2010s, the historic core of Manama underwent revitalisation efforts alongside the Manama souq, which were due to be completed in 2020. The central areas of Manama are also the main location for Muharram processions in the country, attracting hundreds of thousands of people annually from Bahrain and across the Gulf. Notable people Twin towns and sister cities See also Notes References External links
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[SOURCE: https://en.wikipedia.org/wiki/Fauna] \| [TOKENS: 1377]
Contents Fauna The Fauna (pl.: faunae or faunas) is the whole of animal life present in a particular region or time. The corresponding terms for plants and fungi are flora and funga, respectively. Flora, fauna, funga and other forms of life are collectively referred to as biota. Zoologists and paleontologists use fauna to refer to a typical collection of animals found in a specific time or place, e.g. the "Sonoran Desert fauna" or the "Burgess Shale fauna". Paleontologists sometimes refer to a sequence of faunal stages, which is a series of rocks all containing similar fossils. The study of animals of a particular region is called faunistics. Etymology Fauna comes from the name Fauna, a Roman goddess of earth and fertility, the Roman god Faunus, and the related forest spirits called Fauns. All three words are cognates of the name of the Greek god Pan, and panis is the Modern Greek equivalent of fauna (πανίς or rather πανίδα). Fauna is also the word for a book that catalogues the animals in such a manner. The term was first used by Carl Linnaeus from Sweden in the title of his 1745 work Fauna Suecica. Subdivisions on the basis of region Cryofauna refers to the animals that live in, or very close to, cold areas. Cryptofauna is the fauna that exists in protected or concealed microhabitats. Epifauna, also called epibenthos, are aquatic animals that live on the bottom substratum as opposed to within it, that is, the benthic fauna that live on top of the sediment surface at the seafloor. Infauna are benthic organisms that live within the bottom substratum of a water body, especially within the bottom-most oceanic sediments, the layer of small particles at the bottom of a body of water, rather than on its surface. Bacteria and microalgae may also live in the interstices of bottom sediments. In general, infaunal animals become progressively smaller and less abundant with increasing water depth and distance from shore, whereas bacteria show more constancy in abundance, tending toward one million cells per milliliter of interstitial seawater. Such creatures are found in the fossil record and include lingulata, trilobites and worms. They made burrows in the sediment as protection and may also have fed upon detritus or the mat of microbes which tended to grow on the surface of the sediment. Today, a variety of organisms live in and disturb the sediment. The deepest burrowers are the ghost shrimps (Thalassinidea), which go as deep as 3 metres (10 ft) into the sediment at the bottom of the ocean. Limnofauna refers to the animals that live in fresh water. Macrofauna are benthic or soil organisms which are retained on a 0.5 mm sieve. Studies in the deep sea define macrofauna as animals retained on a 0.3 mm sieve to account for the small size of many of the taxa. Megafauna are large animals of any particular region or time. For example, Australian megafauna. Meiofauna are small benthic invertebrates that live in both marine and freshwater environments. The term meiofauna loosely defines a group of organisms by their size, larger than microfauna but smaller than macrofauna, rather than a taxonomic grouping. One environment for meiofauna is between grains of damp sand (see Mystacocarida). In practice these are metazoan animals that can pass unharmed through a 0.5–1 mm mesh but will be retained by a 30–45 μm mesh, but the exact dimensions will vary from researcher to researcher. Whether an organism passes through a 1 mm mesh also depends upon whether it is alive or dead at the time of sorting. Mesofauna are macroscopic soil animals such as arthropods or nematodes. Mesofauna are extremely diverse; considering just the springtails (Collembola), as of 1998, approximately 6,500 species had been identified. Microfauna are microscopic or very small animals (usually including protozoans and very small animals such as rotifers). To qualify as part of the microfauna, an organism must exhibit animal-like characteristics, as opposed to microflora, which are more plant-like. Stygofauna is any fauna that lives in groundwater systems or aquifers, such as caves, fissures and vugs. Stygofauna and troglofauna are the two types of subterranean fauna (based on life-history). Both are associated with subterranean environments – stygofauna is associated with water, and troglofauna with caves and spaces above the water table. Stygofauna can live within freshwater aquifers and within the pore spaces of limestone, calcrete or laterite, whilst larger animals can be found in cave waters and wells. Stygofaunal animals, like troglofauna, are divided into three groups based on their life history - stygophiles, stygoxenes, and stygobites. Troglofauna are small cave-dwelling animals that have adapted to their dark surroundings. Troglofauna and stygofauna are the two types of subterranean fauna (based on life-history). Both are associated with subterranean environments – troglofauna is associated with caves and spaces above the water table and stygofauna with water. Troglofaunal species include spiders, insects, myriapods and others. Some troglofauna lives permanently underground and cannot survive outside the cave environment. Troglofauna adaptations and characteristics include a heightened sense of hearing, touch and smell. Loss of under-used senses is apparent in the lack of pigmentation as well as eyesight in most troglofauna. Troglofauna insects may exhibit a lack of wings and longer appendages. Xenofauna, theoretically, are alien organisms that can be described as animal analogues. While no alien life forms, animal-like or otherwise, are known definitively, the concept of alien life remains a subject of great interest in fields like astronomy, astrobiology, biochemistry, evolutionary biology, science fiction, and philosophy. Other terms include avifauna, which means "bird fauna" and piscifauna (or ichthyofauna), which means "fish fauna". Treatises See also References External links
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[SOURCE: https://en.wikipedia.org/wiki/Kodu_Game_Lab] \| [TOKENS: 748]
Contents Kodu Game Lab Kodu Game Lab, originally named Boku, is a programming integrated development environment (IDE) by Microsoft's FUSE Labs. It runs on Xbox 360 and Microsoft Windows. It was released on the Xbox Live Marketplace on June 30, 2009. A Windows version is available to the general public for download from Microsoft's FUSE web portal. As of 2023, it still receives occasional updates. Overview Kodu is a visual programming tool which is used to teach basic coding principles with the use of blocks and pictures. Its design allows it to be accessible to anyone. Most of the creation takes place within the 3D environment, where programming is done through characters (sometimes referred to as "bots"). [citation needed] Kodu is different from other game development or programming apps in several key ways: Kodu Game Lab has been used as an educational learning tool in selected schools and learning centers. Games created in Kodu can be given a title, description, and any combination of built-in tags, as well as be shared online in the "Community" tab. Language design Kodu's programming model is simplified and can be navigated using a gaming controller or a combination of the keyboard and mouse. It does not use most "serious" programming conventions, including symbolic variables, branching, loops, number and string manipulation, subroutines, polymorphism, and so on. Kodu uses a logic-based system, making it simple to understand for beginners. The simplicity is achieved by situating the programming task in a largely complete simulation environment. The user programs the behaviors of characters in the 3D world, and programs are expressed in a high-level, sensory paradigm consisting of a rule-based system or language, based on conditions and actions similarly to AgentSheets. The typical "hello world" of Kodu is: WHEN see apple DO move toward The grammar, as it were, of this expression is: <condition> <action> Where <condition> is: <sensor> [<filter(s)> ...] And <action> is: <verb> [<modifier(s)> ...] An illustrative variant of the above program, with filters and modifiers applied, is: WHEN see apple blue close-by DO move toward quickly In the above example, the character with this line of code would move quickly toward a nearby apple, provided it is colored blue, and close to the character. Code blocks in Kodu can be indented, allowing for more than one condition per action. Input Kodu allows for user input by setting particular WHEN tiles. Keyboard, mouse, and controller input are accepted. This is primarily used to create controllable characters, but can be applied to any DO function. When programming controller input, player slot can be specified. This (on the Xbox version) can be used to create multiplayer games. Characters Kodu provides users with a large variety of characters called "bots" which can be placed anywhere in the 3D world. Generally, a bot will have unique attributes and physics properties that cannot be changed. "Object" bots, such as rocks and apples, cannot be programmed to move. Certain characters have unique, character-specific abilities (for example, only the Rover can use various science-themed actions. It also lacks the ability to jump or shoot). Bots can be colored one of 11 colors, and have their size and various properties changed. They are the only part of the game that can be programmed using the tile system, and are the primary way of creating games in Kodu. Because player input is optional, Kodu can be used to create zero-player games where bots only interact with each other and the world. See also References External links
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[SOURCE: https://en.wikipedia.org/wiki/List_of_countries_by_number_of_Internet_users] \| [TOKENS: 127]
Contents List of countries by number of Internet users Below is a sortable list of countries by number of Internet users as of December 2025. Internet users are defined as persons who accessed the Internet in the last 3 months from any device, including mobile phones. Percentage is the percentage of a country's population that are Internet users. Estimates are calculated by the International Telecommunication Union using aggregate data. All United Nations member states are included, except North Korea, whose number of internet users is estimated at a few thousand. Table The table contains the population percentage that uses the internet; data from the ITU. See also Notes References External links
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[SOURCE: https://en.wikipedia.org/wiki/Organizational_studies] \| [TOKENS: 609]
Contents Organization studies Organization studies (also called organization science or organizational studies) is the academic field interested in a collective activity, and how it relates to organization, organizing, and management. It is "the examination of how individuals construct organizational structures, processes, and practices and how these, in turn, shape social relations and create institutions that ultimately influence people". Organizational studies comprise different areas that deal with the different aspects of the organizations, many of the approaches are functionalist but critical research also provide an alternative frame for understanding in the field. Fundamental to the study of management is organizational change. Historically, facilitating organizational change has proven to be a difficult subject, which is why different theoretical frameworks have evolved in an attempt to strategically streamline this process, such as utilizing external actors, or interim organizations, where it is important to define the expectations of the outcome of change before initiating it, so as to provide measurability. History It has followed numerous 'turns' since its emergence in the 1960s: linguistic turn, spatial turn, practice turn, process turn, materiality turn, communication turn... A turn is a collective direction of research, focused on some coherent sets of concepts, theories, and ideas, which represent a point of bifurcation for the field itself. Most turns in organization studies relate to broader ones in social sciences and humanities. Researchers studying organizations and/or organizing processes have a recurring concern that those who work in organizations do not find organizational research particularly relevant. There is therefore a growing interest in the impact of organization studies. Public administrations also, around the world, are adopting massively new organizational models to increase their efficiency and improve public services. The Organization Studies field is becoming more popular also because the borders between a well-defined organization and customers, citizens, businesses, and professionals are more and more undefined. For example, social organization has been the subject of study in Spatio-temporal cohesiveness in human network theory. With the recent historical turn, there is growing interest in historical organization studies, promising a closer union between organizational and historical research whose validity derives from historical veracity and conceptual rigor, enhancing understanding of historical, contemporary and future-directed social realities. Organizational studies as a discipline is also closely related to metathinking. Journals Major academic journals of the field are, among others: Organization Science, Organization Studies, Organization Theory and Organization. Conferences Researchers interested in organizations and organizing meet in the context of numerous conferences and workshops: the Academy of Management Annual Conference (in particular the OMT division), the European Group for Organizational Studies (EGOS), the Asia Pacific conference on Research in Organization Studies (APROS), the American and European Conference on Organization Studies (LAEMOS), the Organization Studies Summer Workshop, the International Symposium on Process Organization Studies (PROS), the Standing Conference on Organizational Symbolism (SCOS), the International Research Network (puntOorg), the Organizations, Artifacts & Practices (OAP) workshop, Organization Science Winter Conference, etc. Subfields See also References Further reading
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[SOURCE: https://en.wikipedia.org/wiki/BLC1] \| [TOKENS: 528]
Contents BLC1 BLC1 (Breakthrough Listen Candidate 1) was a candidate SETI radio signal detected and observed during April and May 2019, and first reported on 18 December 2020, spatially coincident with the direction of the Solar System's closest neighboring star, Proxima Centauri. Signal The apparent shift in its frequency, consistent with the Doppler effect, was suggested to be inconsistent with what would be caused by the movement of Proxima b, a planet of Proxima Centauri. The Doppler shift in the signal was the opposite of what would be expected from the Earth's spin, in that the signal was observed to increase in frequency rather than decrease. Although the signal was detected by Parkes Radio Telescope during observations of Proxima Centauri, due to the beam angle of Parkes Radio telescope, the signal would be more accurately described as having come from within a circle roughly 16 arcminutes (approximately 1/4 of a degree, half the angular width of Earth's moon) in angular diameter, containing Proxima Centauri, so the signal could have originated elsewhere in the Alpha Centauri system. The signal had a frequency of 982.002 MHz. The radio signal was detected during 30 hours of observations conducted by Breakthrough Listen through the Parkes Observatory in Australia in April and May 2019. As of December 2020, follow-up observations had failed to detect the signal again, a step necessary to confirm that the signal was a technosignature. Origin A paper by other astronomers released 10 days before the news report about BLC1 reports the detection of "a bright, long-duration optical flare, accompanied by a series of intense, coherent radio bursts" from Proxima Centauri also in April and May 2019. Their finding has not been put in direct relation to the BLC1 signal by scientists or media outlets as of January 2021 but implies that planets around Proxima Centauri and other red dwarfs are uninhabitable for humans and other currently known organisms. In February 2021, a new study proposed that, as the probability of a radio-transmitting civilization emerging on the Sun's closest stellar neighbour was calculated to be approximately 10−8, the Copernican principle made BLC1 very unlikely to be a technological radio signal from the Alpha Centauri System. On 25 October 2021, researchers published two studies concluding that the signal is unlikely to be a technosignature due to its similarity to previously detected terrestrial interference. See also References External links
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[SOURCE: https://en.wikipedia.org/wiki/Guido_Van_Rossum] \| [TOKENS: 973]
Contents Guido van Rossum Guido van Rossum (Dutch: [ˈxidoː vɑn ˈrɔsʏm]; born 31 January 1956) is a Dutch programmer. He is the creator of the Python programming language, for which he was the "benevolent dictator for life" (BDFL) until he stepped down from the position on 12 July 2018. He remained a member of the Python Steering Council through 2019, and withdrew from nominations for the 2020 election. Life and education Van Rossum was born and raised in the Netherlands, where he received a master's degree in mathematics and computer science from the University of Amsterdam in 1982. He received a bronze medal in 1974 in the International Mathematical Olympiad. His brother, Just van Rossum, is a type designer and programmer who designed the typeface used in the "Python Powered" logo. Van Rossum lives in Belmont, California, with his wife, Kim Knapp, and their son. Work While working at the Centrum Wiskunde & Informatica (CWI), Van Rossum wrote and contributed a glob() routine to BSD Unix in 1986 and helped develop the ABC programming language. He once stated, "I try to mention ABC's influence because I'm indebted to everything I learned during that project and to the people who worked on it." He also created Grail, an early web browser written in Python, and engaged in discussions about the HTML standard. He has worked for various research institutes, including the Centrum Wiskunde & Informatica (CWI) in the Netherlands, the U.S. National Institute of Standards and Technology (NIST), and the Corporation for National Research Initiatives (CNRI). In May 2000, he left CNRI along with three other Python core developers to work for tech startup BeOpen.com, which subsequently collapsed by October of the same year. From late 2000 until 2003 he worked for Zope Corporation. In 2003 Van Rossum left Zope for Elemental Security. While there he worked on a custom programming language for the organization. From 2005 to December 2012, Van Rossum worked at Google, where he spent half of his time developing the Python language. At Google, he developed Mondrian, a web-based code review system written in Python and used within the company. He named the software after the Dutch painter Piet Mondrian. He named Rietveld, another related software project, after Gerrit Rietveld, a Dutch designer. On 7 December 2012, Van Rossum left Google. In January 2013, Van Rossum started working at the cloud file storage company Dropbox. In October 2019, Van Rossum left Dropbox and officially retired. On 12 November 2020 Van Rossum announced that he was coming out of retirement to join the Developer Division at Microsoft. He currently holds the title Distinguished Engineer at Microsoft. Python In December 1989, Van Rossum had been looking for a "'hobby' programming project that would keep [him] occupied during the week around Christmas" as his office was closed when he decided to write an interpreter for a "new scripting language [he] had been thinking about lately: a descendant of ABC that would appeal to Unix/C hackers". He chose the name Python for his programming language not because of the snake type but the comedy series Monty Python's Flying Circus. He has explained that Python's predecessor, ABC, was inspired by SETL, noting that ABC co-developer Lambert Meertens had "spent a year with the SETL group at NYU before coming up with the final ABC design". On 12 July 2018, Van Rossum announced that he would be stepping down from the position of benevolent dictator for life of the Python programming language. "Computer Programming for Everybody" proposal In 1999, Van Rossum submitted a funding proposal to the Defense Advanced Research Projects Agency (DARPA) called "Computer Programming for Everybody", in which he further defined his goals for Python: In 2019, Python became the second most popular language on GitHub, the largest source code management website on the internet, after JavaScript. In 2024 Python became the most used language on GitHub, overtaking JavaScript after a 10-year run as the most used language. According to a programming language popularity survey it is consistently among the top 10 most mentioned languages in job postings. Furthermore, Python has been among the 10 most popular programming languages every year since 2004 according to the TIOBE Programming Community Index and got the number one spot on the index in October 2021. Awards References External links
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[SOURCE: https://en.wikipedia.org/wiki/Southern_United_States] \| [TOKENS: 17471]
Contents Southern United States The Southern United States (sometimes Dixie, also referred to as the Southern States, the American South, the Southland, Dixieland, or simply the South) is one of the four census regions defined by the United States Census Bureau. It is between the Atlantic Ocean and the Western United States, with the Midwestern and Northeastern United States to its north and the Gulf of Mexico and Mexico to its south. Historically, the South was defined as all states south of the 18th-century Mason–Dixon line, the Ohio River, and the 36°30′ parallel. Within the South are different subregions such as the Southeast, South Central, Upper South, and Deep South. Maryland, Delaware, Washington, D.C., and Northern Virginia have become more culturally, economically, and politically aligned in certain aspects with the Northeastern United States and are sometimes identified as part of the Northeast or Mid-Atlantic. The U.S. Census Bureau continues to define all four places as formally being in the South. To account for cultural variations across the region, some scholars have proposed definitions of the South that do not coincide neatly with state boundaries. The South does not precisely correspond to the entire geographic south of the United States, but primarily includes the south-central and southeastern states. For example, California, which is geographically in the southwestern part of the country, is not considered part of the South; however, the geographically southeastern state of Georgia is. The politics and economy of the region were historically dominated by a small rural elite. The historical and cultural development of the South has been profoundly influenced by the institution of slave labor, especially in the Deep South and coastal plain areas, from the early 1600s to mid-1800s. This includes the presence of a large proportion of African Americans within the population, support for the doctrine of states' rights, and legacy of racism magnified by the Civil War and Reconstruction era (1865–1877). Following effects included thousands of lynchings, a segregated system of separate schools and public facilities established from Jim Crow laws that remained until the 1960s, and the widespread use of poll taxes and other methods to deny black and poor people the ability to vote or hold office until the 1960s. Scholars have characterized pockets of the Southern United States as being authoritarian enclaves from Reconstruction until the Civil Rights Act of 1964. The South, being home to some of the most racially diverse areas in the United States, is known for having developed its own distinct culture, with different customs, fashion, architecture, musical styles, and cuisines, which have distinguished it in many ways from other areas of the United States. Sociological research indicates that Southern collective identity stems from political, historical, demographic, and cultural distinctiveness from the rest of the United States; however, this has declined since around the late 20th century, with many Southern areas becoming a melting pot of cultures and people. When looked at broadly, studies have shown that Southerners tend to be more conservative than most non-Southerners, with liberalism being mostly predominant in places with a Black majority or urban areas in the South. The region contains almost all of the Bible Belt, an area of high Protestant church attendance, especially evangelical churches such as the Southern Baptist Convention. In the 21st century, it is the fastest-growing region in the United States, with Houston being the region's largest city. Geography The South is a diverse meteorological region with numerous climatic zones, including temperate, sub-tropical, tropical, and arid—though the South generally has a reputation as hot and humid, with long summers and short, mild winters. Most of the South—except for the areas of higher elevations and areas near the western, southern, and some northern fringes—falls in the humid subtropical climate zone. Crops grow readily in the South due to its climate consistently providing growing seasons of at least six months before the first frost. Some common environments include bayous and swamplands, the southern pine forests, the warm temperate montane forest of the Appalachians, the savannas of the southern Great Plains, and the subtropical jungle and maritime forests along the Atlantic and Gulf coasts. Unique flora include various species of magnolia, rhododendron, cane, palm, and oak, among others. Fauna of the region is also diverse, encompassing a plethora of amphibian species, reptiles such as the green anole, the venomous cottonmouth snake, and the American alligator, mammals like the American black bear, the swamp rabbit, and the nine-banded armadillo, and birds such as the roseate spoonbill and the extinct but symbolic carolina parakeet. The question of how to define the boundaries and subregions of the South has long been the focus of research and debate. As defined by the United States Census Bureau, the Southern region of the United States includes sixteen states and the District of Columbia. As of 2010, an estimated 114,555,744 people, or thirty-seven percent of all U.S. residents, lived in the South, the nation's most populous region. The Census Bureau defines three smaller divisions: A survey conducted by social geographers in 2010 selected thirteen states as the cultural South: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Virginia and West Virginia. The Council of State Governments, an organization for communication and coordination between states, includes the same thirteen states as well as Texas and Missouri in its South regional office. Other terms related to the South include: Historically, the South was defined as all states south of the 18th-century Mason–Dixon line, the Ohio River, and the 36°30′ parallel. Newer definitions of the South today are harder to define, due to cultural and sub-regional differences throughout the region; however, definitions usually refer to states that are in the southeastern and south-central geographic regions of the United States. Although not included in the Census definition, two U.S. territories located southeast of Florida (Puerto Rico and the U.S. Virgin Islands) are sometimes included as part of the Southern United States. The Federal Aviation Administration includes Puerto Rico and the U.S. Virgin Islands as part of the South, as does the Agricultural Research Service and the U.S. National Park Service. History The first well-dated evidence of human occupation in the south United States occurs around 9500 BC with the appearance of the earliest documented Americans, who are now referred to as Paleo-Indians. Paleoindians were hunter-gatherers that roamed in bands and frequently hunted megafauna. Several cultural stages, such as Archaic (c. 8000–1000 BC) and the Woodland (c. 1000 BC – AD 1000), preceded what the Europeans found at the end of the 15th century – the Mississippian culture. The Mississippian culture was a complex, mound-building Native American culture that flourished in what is now the Southeastern United States from approximately 800 AD to 1500 AD. Natives had elaborate and lengthy trading routes connecting their main residential and ceremonial centers extending through the river valleys and from the East Coast to the Great Lakes. Some noted explorers who encountered and described the Mississippian culture, by then in decline, included Pánfilo de Narváez (1528), Hernando de Soto (1540), and Pierre Le Moyne d'Iberville (1699). Native American descendants of the mound-builders include Alabama, Apalachee, Caddo, Cherokee, Chickasaw, Choctaw, Creek, Guale, Hitchiti, Houma, and Seminole peoples, all of whom still reside in the South. Other peoples whose ancestral links to the Mississippian culture are less clear, but those who were in the region before the European incursion include the Catawba and the Powhatan.[citation needed] The arrival of European settlers caused a massive population decline in Native Americans, due to Europeans unknowingly spreading diseases that the natives had no immunities towards, numerous violent conflicts, and forcibly relocating them. The predominant culture of the original Southern states was English. In the 17th century, most voluntary immigrants were of English origin and settled chiefly along the eastern coast but had pushed as far inland as the Appalachian Mountains by the 18th century. The majority of early English settlers were indentured servants, who gained freedom after working off their passage. The wealthier men, typically members of the English landed gentry, who paid their way received land grants known as headrights to encourage settlement. The Spanish and French established settlements in Florida, Texas, and Louisiana. The Spanish settled Florida in the 16th century, reaching a peak in the late 17th century, but the population was small because the Spaniards were relatively uninterested in agriculture, and Florida had no mineral resources. There were regional differences in the Southern colonies, with the three main regions of Tidewater, the Deep South, and Appalachia. The first region to be settled was Tidewater, containing the low-lying plains of southeast Virginia, northeastern North Carolina, southern Maryland and the Chesapeake Bay. The next region to be settled was the Deep South, beginning in Province of Carolina and later the Province of Georgia. The last region to be settled was Appalachia, also settled by the Scotch-Irish. King Charles II of England granted the Charter of Carolina in 1663 for land south of the British Colony of Virginia and north of Spanish Florida. He granted the land to eight lords proprietor. Charles granted the land in return for their financial and political assistance in restoring him to the throne in 1660. The granted lands included all or part of the present-day U.S. states of North Carolina, Tennessee, South Carolina, Georgia, Alabama, Mississippi, and Florida. In the British colonies, immigration began in 1607 and continued until the outbreak of the Revolution in 1775. Settlers cleared land, built houses and outbuildings, and on their own farms. The Southern rich owned large plantations that dominated export agriculture and used slaves. Many were involved in the labor-intensive cultivation of tobacco, the first cash crop of Virginia. Tobacco exhausted the soil quickly, requiring that farmers regularly clear new fields. They used old fields as pasture, and for crops such as corn wheat, or allowed them to grow into woodlots. In the mid-to-late-18th century, large groups of Ulster Scots (later called the Scotch-Irish) and people from the Anglo-Scottish border region immigrated and settled in the back country of Appalachia and the Piedmont. They were the largest group of non-English immigrants from the British Isles before the American Revolution. In the 1980 census, 34% of Southerners reported that they were of English ancestry. Except in Louisiana, where French is predominant, English was the largest reported European ancestry in every Southern state by a large margin. The early colonists engaged in warfare, trade, and cultural exchanges. Those living in the backcountry were more likely to encounter Creek Indians, Cherokee, and Choctaws and other regional native groups. The oldest university in the South, the College of William & Mary, was founded in 1693 in Virginia; it pioneered in the teaching of political economy and educated future U.S. Presidents Jefferson, Monroe and Tyler, all from Virginia. Indeed, the entire region dominated politics in the First Party System era: for example, four of the first five presidents – Washington, Jefferson, Madison and Monroe – were from Virginia. The two oldest public universities are also in the South: the University of North Carolina (1789) and the University of Georgia (1785). Slavery was legal in all of the Thirteen Colonies prior to the American Revolution in 1776. Britain had slave island colonies in the Caribbean, including Jamaica, Barbados, Nevis, and Antigua, which provided a steady flow of profits from the slave labor that produced sugar. The Southern Colonies differed in that the proportion of their populations that were African American slaves was much higher than in the Middle Colonies and New England Colonies, as shown on the map. According to Bertram Wyatt-Brown, "Bondage was an answer to an economic need. The South was not founded to create slavery; slavery was recruited to perpetuate the South." The Barbados Slave Code of 1661 served as the basis for the slave codes adopted in the British American colonies of the Province of Carolina and the Province of Georgia. In other colonies where the slaves codes were not an exact copy, such as the Colony of Virginia and the Province of Maryland, the influence of the Barbados Slave Code can be traced throughout various provisions. During the American Revolutionary War, the Southern colonies helped embrace the Patriot cause. Virginia would provide leaders such as commander-in-chief George Washington, and the author of the Declaration of Independence, Thomas Jefferson. In 1780 and 1781, the British largely halted reconquest of the northern states and concentrated on the south, where they were told there was a large Loyalist population ready to leap to arms once the royal forces arrived. The British took control of Savannah and Charleston, capturing a large American army in the process, and set up a network of bases inland. Although there were Loyalists within the Southern colonies, they were concentrated in larger coastal cities and were not great enough in number to overcome the revolutionaries. The British forces at the Battle of Monck's Corner and the Battle of Lenud's Ferry consisted entirely of Loyalists with the exception of the commanding officer (Banastre Tarleton). Both white and black Loyalists fought for the British at the Battle of Kemp's Landing in Virginia. Led by Nathanael Greene and other generals, the Americans engaged in Fabian tactics designed to wear down the British invasion force and to neutralize its strong points one by one. There were numerous battles large and small, with each side claiming some victories. By 1781, however, British General Cornwallis moved north to Virginia, where an approaching army forced him to fortify and await rescue by the British Navy. The British Navy did arrive, but so did a stronger French fleet, and Cornwallis was trapped. American and French armies, led by George Washington, forced Cornwallis to surrender his entire army in Yorktown, Virginia, in October 1781, effectively winning the North American part of the war.[pages needed] The Revolution provided a shock to slavery in the South and other regions of the new country. Thousands of slaves took advantage of wartime disruption to find their own freedom, catalyzed by the British Governor Dunmore of Virginia's promise of freedom for service. Many others were removed by Loyalist owners and became slaves elsewhere in the British Empire. Between 1770 and 1790, there was a sharp decline in the percentage of blacks – from 61% to 44% in South Carolina and from 45% to 36% in Georgia. In addition, some slaveholders were inspired to free their slaves after the Revolution. They were moved by the principles of the Revolution, along with Quaker and Methodist preachers who worked to encourage slaveholders to free their slaves. Planters such as George Washington often freed slaves by their wills. In the Upper South, more than 10% of all blacks were free by 1810, a significant expansion from pre-war proportions of less than 1% free. Cotton became dominant in the lower South after 1800. After the invention of the cotton gin, short staple cotton could be grown more widely. This led to an explosion of cotton cultivation, especially in the frontier uplands of Georgia, Alabama and other parts of the Deep South, as well as riverfront areas of the Mississippi Delta. Migrants poured into those areas in the early decades of the 19th century, when county population figures rose and fell as swells of people kept moving west. The expansion of cotton cultivation required more slave labor, and the institution became even more deeply an integral part of the South's economy. With the opening up of frontier lands after the government forced most Native Americans to move west of the Mississippi, there was a major migration of both whites and blacks to those territories. From the 1820s through the 1850s, more than one million enslaved Africans were transported to the Deep South in forced migration, two-thirds of them by slave traders and the others by masters who moved there. Planters in the Upper South sold slaves in excess of their needs as they shifted from tobacco to mixed agriculture. Many enslaved families were broken up, as planters preferred mostly strong males for field work. Two major political issues that festered in the first half of the 19th century caused political alignment along sectional lines, strengthened the identities of North and South as distinct regions with certain strongly opposed interests, and fed the arguments over states' rights that culminated in secession and the Civil War. One of these issues concerned the protective tariffs enacted to assist the growth of the manufacturing sector, primarily in the North. In 1832, in resistance to federal legislation increasing tariffs, South Carolina passed an ordinance of nullification, a procedure in which a state would, in effect, repeal a Federal law. Soon a naval flotilla was sent to Charleston harbor, and the threat of landing ground troops was used to compel the collection of tariffs. A compromise was reached by which the tariffs would be gradually reduced, but the underlying argument over states' rights continued to escalate in the following decades. The second issue concerned slavery, primarily the question of whether slavery would be permitted in newly admitted states. The issue was initially finessed by political compromises designed to balance the number of "free" and "slave" states. The issue resurfaced in a more virulent form, however, around the time of the Mexican–American War, which raised the stakes by adding new territories primarily on the Southern side of the imaginary geographic divide. Congress opposed allowing slavery in these territories. Before the Civil War, the number of immigrants arriving at Southern ports began to increase, although the North continued to receive the most immigrants. Huguenots were among the first settlers in Charleston, along with the largest number of Orthodox Jews outside of New York City.[citation needed] Numerous Irish immigrants settled in New Orleans, establishing a distinct ethnic enclave now known as the Irish Channel. Germans also went to New Orleans and its environs, resulting in a large area north of the city (along the Mississippi) becoming known as the German Coast. Still greater numbers immigrated to Texas (especially after 1848), where many bought land and were farmers. Many more German immigrants arrived in Texas after the Civil War, where they created the brewing industry in Houston and elsewhere, became grocers in numerous cities, and also established wide areas of farming. By 1840, New Orleans was the wealthiest city in the country and the third largest in population. The success of the city was based on the growth of international trade associated with products being shipped to and from the interior of the country down the Mississippi River. New Orleans also had the largest slave market in the country, as traders brought slaves by ship and overland to sell to planters across the Deep South. The city was a cosmopolitan port with a variety of jobs that attracted more immigrants than other areas of the South. Because of lack of investment, however, construction of railroads to span the region lagged behind the North. People relied most heavily on river traffic for getting their crops to market and for transportation. Between 1830 and 1850, Native Americans were removed from their home states in the South and Eastern United States and were sent to Oklahoma. By 1856, the South had lost control of Congress, and was no longer able to silence calls for an end to slavery – which came mostly from the more populated, free states of the North. The Republican Party, founded in 1854, pledged to stop the spread of slavery beyond those states where it already existed. After Abraham Lincoln was elected the first Republican president in 1860, seven cotton states declared their secession and formed the Confederate States of America before Lincoln was inaugurated. The United States government, both outgoing and incoming, refused to recognize the Confederacy, and when the new Confederate President Jefferson Davis ordered his troops to open fire on Fort Sumter in April 1861, war broke out. Only the state of Kentucky attempted to remain neutral, and it could only do so briefly. When Lincoln called for troops to suppress what he referred to as "combinations too powerful to be suppressed by the ordinary" judicial or martial means, four more states decided to secede and join the Confederacy (which then moved its capital to Richmond, Virginia). Although the Confederacy had large supplies of captured munitions and many volunteers, it was slower than the Union in dealing with the border states. While the Upland South border states of Kentucky, Missouri, West Virginia, Maryland, and Delaware, as well as the District of Columbia, continued to permit slavery during the Civil War, they remained with the Union though Kentucky and Missouri both had rival Confederate governments that formed that were admitted and recognized by the Confederacy. Though early in the war, the Confederacy controlled more than half of Kentucky and the southern portion of Missouri. By March 1862, the Union largely controlled all the border state areas, had shut down all commercial traffic from all Confederate ports, had prevented European recognition of the Confederate government, and was poised to seize New Orleans. The rugged mountainous East Tennessee region attempted to rejoin the Union as a new state, having opposed secession and slavery compared to most of Tennessee. In the four years of war, from 1861 to 1865, the South was the primary battleground, with all but two of the major battles taking place on Southern soil. Union forces led numerous campaigns into the western Confederacy, controlling the border states in 1861, the Tennessee River, the Cumberland River and New Orleans in 1862, and the Mississippi River in 1863. In the East, however, the Confederate Army under Robert E. Lee beat off attack after attack in its defense of the Confederate capital of Richmond. But when Lee tried to move north, he was repulsed (and nearly captured) at Sharpsburg in 1862 and Gettysburg in 1863. The Confederacy had the resources for a short war, but was unable to finance or supply a longer war. It reversed the traditional low-tariff policy of the South by imposing a new 15% tax on all imports from the Union. The Union blockade stopped most commerce from entering the South, and smugglers avoided the tax, so the Confederate tariff produced too little revenue to finance the war. Inflated currency was the solution, but that created distrust of the Richmond government. Because of low investment in railroads, the Southern transportation system depended primarily on river and coastal traffic by boat; both were shut down by the Union Navy. The small railroad system virtually collapsed, so that by 1864 internal travel was so difficult that the Confederate economy was crippled. The Confederate cause was hopeless by the time Atlanta fell and William T. Sherman marched through Georgia in late 1864, but the rebels fought on until Lee's army surrendered in April 1865. Once the Confederate forces surrendered, the region moved into the Reconstruction Era (1865–1877), in a partially successful attempt to rebuild the destroyed region and grant civil rights to freed slaves. Southerners who were against the Confederate cause during the Civil War were known as Southern Unionists. They were also known as Union Loyalists or Lincoln's Loyalists. Within the eleven Confederate states, states such as Tennessee (especially East Tennessee), Virginia (which included West Virginia at the time), and North Carolina were home to the largest populations of Unionists. Many areas of Southern Appalachia harbored pro-Union sentiment as well. As many as 100,000 men living in states under Confederate control would serve in the Union Army or pro-Union guerrilla groups. Although Southern Unionists came from all classes, most differed socially, culturally, and economically from the regions dominant pre-war planter class. The South suffered more than the North overall, as the Union strategy of attrition warfare meant that Lee could not replace his casualties, and the total war waged by Sherman, Sheridan and other Union armies devastated the infrastructure and caused widespread poverty and distress. The Confederacy suffered military losses of 95,000 soldiers killed in action and 165,000 who died of disease, for a total of 260,000, out of a total white Southern population at the time of around 5.5 million. Based on 1860 census figures, 8% of all white males aged 13 to 43 died in the war, including 6% in the North and about 18% in the South. Northern military deaths were greater than Southern military deaths in absolute numbers, but were two-thirds smaller in terms of proportion of the population affected. After the Civil War, the South was devastated in terms of infrastructure and economy. Because of states' reluctance to grant voting rights to freedmen, Congress instituted Reconstruction governments. It established military districts and governors to rule over the South until new governments could be established. Many white Southerners who had actively supported the Confederacy were temporarily disenfranchised. Rebuilding was difficult as people grappled with the effects of a new labor economy of a free market in the midst of a widespread agricultural depression. In addition, the limited infrastructure the South had was mostly destroyed by the war. At the same time, the North was rapidly industrializing. To avoid the social effects of the war, most of the Southern states initially passed black codes. During Reconstruction, these were mostly legally nullified by federal law and anti-Confederate legislatures, which existed for a short time during Reconstruction. There were thousands of people on the move, as African Americans tried to reunite families separated by slave sales, and sometimes migrated for better opportunities in towns or other states. Other freed people moved from plantation areas to cities or towns for a chance to get different jobs. At the same time, whites returned from refuges to reclaim plantations or town dwellings. In some areas, many whites returned to the land to farm for a while. Some freedpeople left the South altogether for states such as Ohio and Indiana, and later, Kansas. Thousands of others joined the migration to new opportunities in the Mississippi and Arkansas Delta bottomlands, and Texas. With passage of the 13th Amendment to the Constitution of the United States (which outlawed slavery), the 14th Amendment (which granted full U.S. citizenship to African Americans) and the 15th Amendment (which extended the right to vote to African American males), African Americans in the South were made free citizens and were given the right to vote. Under Federal protection, white and black Republicans formed constitutional conventions and state governments. Among their accomplishments were creating the first public education systems in Southern states, and providing for welfare through orphanages, hospitals and similar institutions. Northerners came south to participate in politics and business. Some were representatives of the Freedmen's Bureau and other agencies of Reconstruction; some were humanitarians with the intent to help black people. Some were adventurers who hoped to benefit themselves by questionable methods. They were all condemned with the pejorative term of carpetbagger. Some Southerners would also take advantage of the disrupted environment and made money off various schemes, including bonds and financing for railroads. White Southerners who supported Reconstruction policies and efforts became known as scalawags. Secret vigilante organizations such as the Ku Klux Klan – an organization sworn to perpetuate white supremacy – had arisen quickly after the war's end in the 1860s, and used lynching, physical attacks, house burnings and other forms of intimidation to keep African Americans from exercising their political rights. Although the first Klan was disrupted by prosecution by the Federal government in the early 1870s, other groups persisted. By the mid-to-late-1870s, some upper class Southerners created increasing resistance to the altered social structure. Paramilitary organizations such as the White League in Louisiana (1874), the Red Shirts in Mississippi (1875) and rifle clubs, all "White Line" organizations, used organized violence against Republicans, both black and white, to remove Republicans from political office, repress and bar black voting, and restore the Democratic Party to power. In 1876 white Democrats regained power in most of the state legislatures. They began to pass laws designed to strip African Americans and Poor Whites from the voter registration rolls. The success of late-19th century interracial coalitions in several states inspired a reaction among some white Democrats, who worked harder to prevent both groups from voting. Despite discrimination, many blacks became property owners in areas that were still developing. For instance, 90% of the Mississippi's bottomlands were still frontier and undeveloped after the war. By the end of the century, two-thirds of the farmers in Mississippi's Delta bottomlands were black. They had cleared the land themselves and often made money in early years by selling off timber. Tens of thousands of migrants went to the Delta, both to work as laborers to clear timber for lumber companies, and many to develop their own farms. Nonetheless, the long agricultural depression, along with disenfranchisement and lack of access to credit, led to many blacks in the Delta losing their property by 1910 and becoming sharecroppers or landless workers over the following decade. More than two generations of free African Americans lost their stake in property. Nearly all Southerners, black and white, suffered economically as a result of the Civil War. Within a few years cotton production and harvest was back to pre-war levels, but low prices through much of the 19th century hampered recovery. They encouraged immigration by Chinese and Italian laborers into the Mississippi Delta. While the first Chinese entered as indentured laborers from Cuba, the majority came in the early 20th century. Neither group stayed long at rural farm labor. The Chinese became merchants and established stores in small towns throughout the Delta, establishing a place between white and black. Migrations continued in the late 19th and early 20th centuries among both blacks and whites. In the last two decades of the 19th century about 141,000 blacks left the South, and more after 1900, totaling a loss of 537,000. After that the movement increased in what became known as the Great Migration from 1910 to 1940, and the Second Great Migration through 1970. Even more whites left the South, some going to California for opportunities and others heading to Northern industrial cities after 1900. Between 1880 and 1910, the loss of whites totaled 1,243,000. Five million more left between 1940 and 1970. From 1890 to 1908, ten of the eleven former Confederate states, along with Oklahoma upon statehood, passed disenfranchising constitutions or amendments that introduced voter registration barriers – such as poll taxes, residency requirements and literacy tests – that were hard for minorities to meet. Most African Americans, most Mexican Americans, and tens of thousands of poor whites were disenfranchised, losing the vote for decades. In some states, grandfather clauses temporarily exempted white illiterates from literacy tests. The numbers of voters dropped drastically throughout the former Confederacy as a result. This can be seen via the feature "Turnout in Presidential and Midterm Elections" at the University of Texas' Politics: Barriers to Voting. Alabama, which had established universal white suffrage in 1819 when it became a state, also substantially reduced voting by poor whites. Democrat-controlled legislatures passed Jim Crow laws to segregate public facilities and services, including transportation. While African Americans, poor whites and civil rights groups started litigation against such provisions in the early 20th century, for decades Supreme Court decisions overturning such provisions were rapidly followed by new state laws with new devices to restrict voting. Most blacks in the former Confederacy and Oklahoma could not vote until 1965, after passage of the Voting Rights Act and Federal enforcement to ensure people could register. Despite increases in the eligible voting population with the inclusion of women, blacks, and those eighteen and over throughout this period, turnout in ex-Confederate states remained below the national average throughout the 20th century. Not until the late 1960s did all American citizens regain protected civil rights by passage of legislation following the leadership of the American Civil Rights Movement. Historian William Chafe has explored the defensive techniques developed inside the African American community to avoid the worst features of Jim Crow as expressed in the legal system, unbalanced economic power, and intimidation and psychological pressure. Chafe says "protective socialization by blacks themselves" was created inside the community to accommodate white-imposed sanctions while subtly encouraging challenges to those sanctions. Known as "walking the tightrope", such efforts at bringing about change were only slightly effective before the 1920s, but did build the foundation that younger African Americans deployed in their aggressive, large-scale activism during the civil rights movement in the 1950s and 1960s. At the end of the 19th century, white Democrats in the South had created state constitutions that were hostile to industry and business development, with anti-industrial laws extensive from the time new constitutions were adopted in the 1890s. Banks were few and small; there was little access to credit. Traditional agriculture persisted across the region. Especially in Alabama and Florida, rural minorities held control in many state legislatures long after population had shifted to industrializing cities, and legislators resisted business and modernizing interests: Alabama refused to redistrict between 1901 and 1972, long after major population and economic shifts to cities. For decades Birmingham generated the majority of revenue for the state, for instance, but received little back in services or infrastructure. In the late 19th century, Texas rapidly expanded its railroad network, creating a network of cities connected on a radial plan and linked to the port of Galveston. Strikes and labor unrest served as a reflection of increasing industry: "in 1885 Texas ranked ninth among forty states in number of workers involved in strikes (4,000); for the six-year period it ranked fifteenth. Seventy-five of the one hundred strikes, chiefly interstate strikes of telegraphers and railway workers, occurred in the year 1886." By 1890, Dallas became the largest city in Texas, and by 1900 it had a population of more than 42,000, which more than doubled to over 92,000 a decade later. Dallas was the harnessmaking capital of the world and a center of other manufacturing. As an example of its ambitions, in 1907 Dallas built the Praetorian Building, fifteen storeys tall and the first skyscraper west of the Mississippi, soon to be followed by other skyscrapers. Texas was transformed by a railroad network linking five important cities, among them Houston with its nearby port at Galveston, Dallas, Fort Worth, San Antonio, and El Paso. Each exceeded fifty thousand in population by 1920, with the major cities having three times that population. Business interests were ignored by the Southern Democrat ruling class. Nonetheless, major new industries started developing in cities such as Atlanta, Georgia; Birmingham, Alabama; and Dallas, Fort Worth, and Houston, Texas. Growth began occurring at a geometric rate. Birmingham became a major steel producer and mining town, with major population growth in the early decades of the 20th century. The first major oil well in the South was drilled at Spindletop near Beaumont, Texas, on the morning of January 10, 1901. Other oil fields were later discovered nearby in Arkansas, Oklahoma, and under the Gulf of Mexico. The resulting "Oil Boom" permanently transformed the economy of the West South Central states and produced the richest economic expansion after the Civil War. In the early 20th century, invasion of the boll weevil devastated cotton crops in the South, producing an additional catalyst to African Americans' decisions to leave the South. From 1910 to 1970, more than 6.5 million African Americans left the South in the Great Migration to Northern and Western cities, defecting from persistent lynching, violence, segregation, poor education, and inability to vote. Black migration transformed many Northern and Western cities, creating new cultures and music. Many African Americans, like other groups, became industrial workers; others started their own businesses within the communities. Southern whites also migrated to industrial cities like Chicago, Detroit, Oakland, and Los Angeles, where they took jobs in the booming new auto and defense industry. Later, the Southern economy was dealt additional blows by the Great Depression and the Dust Bowl. After the Wall Street Crash of 1929, the economy suffered significant reversals and millions were left unemployed. Beginning in 1934 and lasting until 1939, an ecological disaster of severe wind and drought caused an exodus from Texas and Arkansas, the Oklahoma Panhandle region, and the surrounding plains, in which over 500,000 Americans were homeless, hungry and jobless. Thousands would leave the region to seek economic opportunities along the West Coast. President Franklin D. Roosevelt noted the South as the "number one priority" in terms of need of assistance during the Great Depression. His administration created programs such as the Tennessee Valley Authority in 1933 to provide rural electrification and stimulate development. Locked into low-productivity agriculture, the region's growth was slowed by limited industrial development, low levels of entrepreneurship, and the lack of capital investment. World War II marked a time of dramatic change within the South from an economic standpoint, as new industries and military bases were developed by the federal government, providing much-needed capital and infrastructure in many regions. People from all parts of the US came to the South for military training and work in the region's many bases and new industries. During and after the war millions of hard-scrabble farmers, both white and black, left agriculture for other occupations and urban jobs. The United States began mobilizing for war in a major way in the spring of 1940. The warm weather of the South proved ideal for building 60% of the Army's new training camps and nearly half the new airfields. In all, 40% of spending on new military installations went to the South. For example, in 1940 the small town of 1500 people in Starke, Florida, became the base of Camp Blanding. By March 1941, 20,000 men were constructing a permanent camp for 60,000 soldiers. Money flowed freely for the war effort, as over $4 billion went into military facilities in the South, and another $5 billion into defense plants. Major shipyards were built in Virginia, in Charleston, South Carolina, and along the Gulf Coast. Huge warplane plants were opened in Dallas-Fort Worth and Georgia. The most secret and expensive operation was at Oak Ridge, Tennessee, where unlimited amounts of locally generated electricity were used to prepare uranium for the atom bomb. The number of production workers doubled during the war. Most training centers, factories and shipyards were closed in 1945, but not all, and the families that left hardscrabble farms remained to find jobs in the growing urban South. The region had finally reached the take off stage into industrial and commercial growth, although its income and wage levels lagged well behind the national average. Nevertheless, as George B. Tindall notes, the transformation was, "The demonstration of industrial potential, new habits of mind, and a recognition that industrialization demanded community services." Per capita income jumped 140% from 1940 to 1945, compared to 100% elsewhere in the United States. Southern income rose from 59% to 65%. Dewey Grantham says the war, "brought an abrupt departure from the South's economic backwardness, poverty, and distinctive rural life, as the region moved perceptively closer to the mainstream of national economic and social life." Since 1970, the proportion of the African American population living in the South stabilized and began slightly increasing. Farming shifted from cotton and tobacco, to include cattle, rice, soybeans, corn, and other foods. Industrial growth increased in the 1960s and greatly accelerated into the 1980s and 1990s. Several large urban areas in Texas, Georgia, and Florida grew to over four million people. Rapid expansion in industries such as autos, telecommunications, textiles, technology, banking, and aviation gave some states in the South an industrial strength to rival large states elsewhere in the country. By the 2000 census, the South (along with the West) was leading the nation in population growth. With this growth, however, has come long commute times and air pollution problems in cities such as Dallas, Houston, Atlanta, Austin, Charlotte, and others that rely on sprawling development and highway networks. In the 21st century, and especially after the 2010 midterm elections, the Republican Party has largely dominated the South, both at the state and federal levels. As of 2024, Republicans control both houses of the state legislatures of 10 out of the eleven former Confederate States, the sole exception being the Virginia General Assembly. However, there are still some Democratic statewide officeholders in the South, such as Kentucky governor Andy Beshear, North Carolina governor Josh Stein, Virginia's U.S. Senators Mark Warner and Tim Kaine, and Georgia's U.S. Senators Raphael Warnock and Jon Ossoff. In 2019, Fortune 500 companies headquartered in Southern states included: Texas with 50, Virginia with 21, Florida with 18, Georgia with 17, North Carolina with 11, and Tennessee with 10. In 2022, Texas led the nation with the most Fortune 500 company headquarters with 53. This economic expansion has enabled parts of the South to report some of the lowest unemployment rates in the United States. Even with certain southern states and areas doing well economically, many southern states and areas still have high poverty rates when compared to the U.S. nationally. In 2021, nine out of the ten states with the highest poverty rates were in the South. Also, in 2023 all five states with the lowest GDP per capita were in the South: Mississippi, West Virginia, Arkansas, Alabama, and South Carolina. Modern economy In the late 20th century, the South changed dramatically. It saw a boom in its service economy, manufacturing base, high technology industries, and the financial sector. Texas in particular witnessed dramatic growth and population change with the dominance of the energy industry and tourism industries, such as the Alamo Mission in San Antonio. Tourism in Florida and along the Gulf Coast also grew steadily throughout the last decades of the 20th century. Numerous new automobile production plants have opened in the region, or are soon to open, such as Mercedes-Benz in Tuscaloosa, Alabama; Hyundai in Montgomery, Alabama; the BMW production plant in Spartanburg, South Carolina; Toyota plants in Georgetown, Kentucky, Blue Springs, Mississippi and San Antonio; the GM manufacturing plant in Spring Hill, Tennessee; a Honda factory in Lincoln, Alabama; the Nissan North American headquarters in Franklin, Tennessee, and factories in Smyrna, Tennessee and Canton, Mississippi; a Kia factory in West Point, Georgia; the Volkswagen Chattanooga Assembly Plant in Chattanooga, Tennessee; and Ford Motor Company’s Blue Oval City near Stanton, Tennessee. The two largest research parks in the country are located in the South: Research Triangle Park in North Carolina (the world's largest) and the Cummings Research Park in Huntsville, Alabama (the world's fourth largest). In medicine, the Texas Medical Center in Houston has achieved international recognition in education, research, and patient care, especially in the fields of heart disease, cancer, and rehabilitation. In 1994 the Texas Medical Center was the largest medical center in the world including fourteen hospitals, two medical schools, four colleges of nursing, and six university systems. The University of Texas M.D. Anderson Cancer Center is consistently ranked the No. 1 cancer research and treatment center in the United States. Many major banking corporations have headquarters in the region. Bank of America and Truist Financial are in Charlotte. Wachovia was headquartered there before its purchase by Wells Fargo. Regions Financial Corporation is in Birmingham, as is AmSouth Bancorporation, and previously BBVA Compass before its acquisition by PNC Financial Services. Atlanta is the district headquarters of the Federal Reserve Bank of Atlanta. Many corporations are headquartered in Atlanta and its surrounding area, such as The Coca-Cola Company, Delta Air Lines, and The Home Depot, and also many cable television networks, such as the Turner Broadcasting System (CNN, TBS, TNT, Turner South, Cartoon Network) and The Weather Channel. Education Southern public schools in the past have ranked in the lower half of some national surveys. When allowance for race is considered, a 2007 US Government list of test scores often shows white fourth and eighth graders performing better than average for reading and math; while black fourth and eighth graders also performed better than average. This comparison does not hold across the board. Mississippi often scores lower than national averages, no matter how statistics are compared. Newer data from 2009 suggests that secondary school education in the South is on par nationally, with 72% of high schoolers graduating compared to 73% nationwide. The Southern United States is home to some of the nation's largest and most prominent public and private institutions of higher education. Notable public colleges and universities in the South include: Notable private colleges and universities in the South include: Culture The American South is known for its distinctive dialect and accent. The predominant culture of the South is English, and has its origins with the settlement of the region by large groups of people particularly from parts of West Midlands, southwest England, and southeast England, such as Sussex, Shropshire, and the West Country who moved to the Tidewater and the eastern parts of the Deep South in the 17th and early 18th centuries. For example, the city of Birmingham, Alabama, is named after Birmingham, England in the West Midlands. Northern English, Scots lowlanders and Ulster-Scots (later called the Scotch-Irish) who settled in Appalachia and the Upland South in the mid to late 18th century, and the many African people who were brought to the American South as slaves. Their descendants, identified as Black or African American people, compose the United States' second-largest racial minority, accounting for 12.1% of the total population according to the 2000 census. Despite Jim Crow era outflow to the North, the majority of the black population remains concentrated in Southern states and has heavily contributed to the cultural blend of religion, food, art, and music (see spiritual, blues, jazz, R&B, soul music, country music, zydeco, bluegrass and rock and roll) that characterizes Southern culture today. Overall, the South has had lower housing values, lower household incomes, and lower cost of living than the rest of the United States. These factors, combined with the fact that Southerners have continued to maintain strong loyalty to family ties, has led some sociologists to label white Southerners an ethnic or quasi-ethnic group, though this interpretation has been subject to criticism on the grounds that proponents of the view do not satisfactorily indicate how Southerners meet the criteria of ethnicity. In previous censuses, the largest ancestry group identified by Southerners was English or mostly English, with 19,618,370 self-reporting "English" as an ancestry on the 1980 census, followed by 12,709,872 listing "Irish" and 11,054,127 "Afro-American". Almost a third of all Americans who claim English ancestry can be found in the American South, and over a quarter of all Southerners claim English descent as well. The Southern planter class originated from the early modern English landed gentry, who were aristocratic landowners but not peers or "titled nobility". According to historian G. E. Mingay, the gentry were landowners whose wealth "made possible a certain kind of education, a standard of comfort, and a degree of leisure and a common interest in ways of spending it". Leisure distinguished gentry from businessmen who gained their wealth through work. The gentry did not work; their income came largely from rents paid by tenant farmers living on their estates. The concept of Southern chivalry in the Antebellum South originated from the gentry rank of Gentleman, acting as a chivalric ideal of the white planter class supposedly descended from the knights and Cavaliers of the Medieval and colonial eras. Several Southern states (Maryland, Virginia, North Carolina, South Carolina, and Georgia) were among the British colonies that sent delegates to sign the Declaration of Independence and then fought against the government (Great Britain), along with the Middle and New England colonies, during the Revolutionary War. The basis for much of Southern culture derives from these states being among the original Thirteen Colonies, and from much of the population of the colonial South having ancestral links to colonists who emigrated west. Southern manners and customs reflect the relationship with England that was held by the early population. In 1765, London philanthropist Dr. John Fothergill remarked on the cultural differences of the British American colonies southward from Maryland and those to the north, suggesting that the Southerners were marked by "idleness and extravagance". Fothergill suggested that Southerners were more similar to the people of the Caribbean than to the colonies to the north. J. Hector St. John de Crèvecœur's 1782 Letters from an American Farmer described Charleston, South Carolina, slaveholders as having "all that life affords most bewitching and pleasurable, without labour, without fatigue, hardly subjected to the trouble of wishing." He declared that although slavery had not yet been completely abolished in the Northern states, the lot of northern slaves was far "different... in every respect." Crèvecœur sought to portray Southerners as stuck in the social, cultural and economic remnants of colonialism, in contrast to the Northerners whom he considered to be representative of the distinctive culture of the new nation. Early in United States history, the contrasting characteristics of Southern states were acknowledged in a discussion between Thomas Jefferson and François-Jean de Chastellux. Jefferson ascribed the Southerners' "unsteady", "generous", "candid" traits to their climate, while De Chastellux claimed that Southerners' "indelible character which every nation acquires at the moment of its origin" would "always be aristocratic" not only because of slavery but also "vanity and sloth". A visiting French dignitary concurred in 1810 that American customs seemed "entirely changed" over the Potomac River, and that Southern society resembled those of the Caribbean. The South has had a majority of its population adhering to evangelical Protestantism ever since the early 1800s as a result of the Second Great Awakening, The upper classes often stayed Episcopalian or Presbyterian. The First Great Awakening starting in the 1740s and the Second Great Awakening ending in the 1850s generated large numbers of Methodist and Baptist converts. These denominations remain the two main Christian confessions in the South. By 1900, the Southern Baptist Convention had become the largest Protestant denomination in the whole United States with its membership concentrated in rural areas of the South. Baptists are the most common religious group, followed by Methodists, Pentecostals and other denominations. Roman Catholics historically were concentrated in Maryland, Louisiana, and Hispanic areas such as South Texas and South Florida and along the Gulf Coast. The great majority of black Southerners are either Baptist or Methodist. Statistics show that Southern states have the highest religious attendance figures of any region in the United States, constituting the so-called Bible Belt. Pentecostalism has been strong across the South since the late 19th century. Apart from its climate, the living experience in the South increasingly resembles the rest of the nation. The arrival of millions of Northerners and Westerners, mainly since the late 20th century, has reshaped the culture of major metropolitan areas and coastal areas. While Hispanics have long been a major factor in Texas, millions more have arrived in other Southern states during the 1990s and early 2000s bringing values not rooted in local traditions. Historian Raymond Mohl emphasizes the role of NAFTA in lowering trade barriers and facilitating large-scale population movements. He adds other factors such as ongoing economic crisis in Mexico, new more liberal immigration policies in the United States, labor recruitment and smuggling, that have produced a major flow of Mexican and Hispanic migration to the southeast. That region's low-wage, low-skill economy readily hired cheap, reliable, nonunion labor, without asking applicants too many questions about legal status. Richard J. Gonzales argues that the rise of La Raza (Mexican American community) in terms of numbers and influence in politics, education, and language and cultural rights will grow rapidly in Texas by 2030 when demographers predict Hispanics will outnumber Anglos in Texas. However thus far their political participation and the Latino vote have been low, so the potential political impact is much higher than the actual one thus far. Scholars have suggested that collective identity and Southern distinctiveness are thus declining in the Deep South, particularly when defined against "an earlier South that was somehow more authentic, real, more unified and distinct". On the other hand, Southerners have moved west in large numbers, especially to California and to the Midwest. Thus, journalist Michael Hirsh proposed that aspects of Southern culture have spread throughout a greater portion of the rest of the United States in a process termed "Southernization". Ethnicity The South has the largest African American population by region. The South has largely remained a black and white region while the other regions of the US have received larger amounts of Hispanic and Asian immigrants. However, the Hispanic population has seen rapid growth in certain areas of the South, particularly in South Florida and South Texas. The Upland South is heavily white, with few African Americans in this subregion of the South. Sports American football is heavily considered the most popular team sport in most areas of the Southern United States. The region is home to numerous decorated and historic college football programs, particularly in the Southeastern Conference (known as the "SEC"), Atlantic Coast Conference (known as the "ACC"), and the Big 12 Conference. The SEC, consisting almost entirely of teams based in Southern states, is widely considered to be the strongest league in contemporary college football and includes the Alabama Crimson Tide, the program with the most national championships in the sport's modern history. The sport is also highly competitive and has a spectator following at the high school level, particularly in rural areas, where high school football games often serve as prominent community gatherings. The first established professional football team based in the South were the Washington Redskins, now called the Washington Commanders. They still retain a large following in most of Virginia and parts of Maryland. Later on, the National Football League (NFL) and American Football League (AFL) began to expand many teams in the Southern US during the 1960s, with franchises like the Atlanta Falcons, New Orleans Saints, Houston Oilers, Miami Dolphins, and the Dallas Cowboys. In later decades, NFL expansion into Southern states continued, with the Tampa Bay Buccaneers during the 1970s, along with the Carolina Panthers, Jacksonville Jaguars, and Baltimore Ravens during the 1990s. The Houston Oilers were eventually replaced by the Houston Texans, after the Oilers relocated to Nashville to become the Tennessee Titans. Baseball has been played in the Southern United States dating back to the mid-19th century. It was traditionally more popular than American football until the 1980s and still accounts for the largest annual attendance amongst sports played in the South. The first mention of a baseball team in Houston was on April 11, 1861. During the late 19th century and early 20th century games were common, especially once the professional leagues such as the Texas League, the Dixie League, and the Southern League were organized. The short-lived Louisville Colonels were a part of the early National League and American Association, but ceased to exist in 1899. The first Southern Major League Baseball team after the Colonels appeared in 1962, when the Houston Colt .45s (known today as the Houston Astros) were enfranchised. Later, the Atlanta Braves came in 1966, followed by the Texas Rangers in 1972, and finally the Miami Marlins and Tampa Bay Rays in the 1990s. College baseball appears to be more well attended in the South than elsewhere, as teams like Florida State, Arkansas, LSU, Virginia, Mississippi State, Ole Miss, South Carolina, Florida and Texas are commonly at the top of the NCAA's attendance. The South generally produces very successful collegiate baseball teams with Virginia, Vanderbilt, LSU, South Carolina, Florida Coastal Carolina and Tennessee winning recent College World Series Titles. The following is a list of each MLB team in the Southern U.S. and the total fan attendance for 2019: The Southern states are commonly associated with stock car racing and its most prominent competition level NASCAR, which is headquartered in Charlotte and Daytona Beach. The sport was developed in the South during the early 20th century, with stock car racing's historic mecca being Daytona Beach, where cars initially raced on the wide, flat beachfront, before the construction of Daytona International Speedway. Though the sport has attained a following throughout the United States, a majority of NASCAR races continue to take place at Southern tracks. Basketball is very popular throughout the Southern United States as both a recreational and spectator sport, particularly in the states of Kentucky and North Carolina. Both states are home to several prominent college basketball programs, including the Kentucky Wildcats, Louisville Cardinals, Duke Blue Devils and North Carolina Tar Heels. Other southern teams, like the Florida Gators and Virginia Cavaliers have won national championships. NBA teams based in the South include the San Antonio Spurs, Houston Rockets, Oklahoma City Thunder, Dallas Mavericks, Washington Wizards, Charlotte Hornets, Atlanta Hawks, Orlando Magic, Memphis Grizzlies, New Orleans Pelicans, and Miami Heat. The Spurs and Heat in particular have become prominent within the NBA, with eight championships won by the two between 1999 and 2014. Golf is a popular recreational sport in most areas of the South, with the region's warm climate allowing it to host many professional tournaments and numerous destination golf resorts, particularly in the state of Florida. The region is home to The Masters which is played at Augusta National Golf Club in Augusta, Georgia, and has become one of the professional game's most important tournaments. One of the four major championships in Hilton Head Island, in South Carolina, is also home to a prominent American golf tournament and has several high-quality courses. In recent decades association football, known in the South as in the rest of the United States as "soccer", has become a popular sport at youth and collegiate levels throughout the region. The game has been historically widespread at the college level in the Atlantic coast states of Maryland, Virginia, and the Carolinas; which contain many of the nation's most successful college soccer programs. In women's soccer the North Carolina Tar Heels has won 22 national championships, by far the most of any school, and in men's soccer Virginia has won 7 NCAA National Championships, the third most of any school. The establishment of Major League Soccer has led to professional soccer clubs in the Southern cities including FC Dallas, Houston Dynamo, D.C. United, Orlando City, Inter Miami, Nashville SC, Atlanta United, Austin FC and Charlotte FC. The current United States second division soccer league, the USL Championship, was initially geographically based in the coastal Southeast around clubs in Charleston, Richmond, Charlotte, Wilmington, Raleigh, Virginia Beach, and Atlanta. The Southern region is home to numerous professional sports franchises in the "Big Five" leagues (NFL, NBA, MLS, NHL, and MLB), with many championships collectively among them. Professional sports leagues such as the National Football League (NFL), Major League Baseball (MLB), National Basketball Association (NBA), Women's National Basketball Association (WNBA), National Hockey League (NHL), Major League Soccer (MLS), and National Women's Soccer League (NWSL), have team franchises in following cities/metropolitan areas of the region: Health The map on the right shows that life expectancy is lower overall in most Southern states compared to the rest of the country. Obesity rates, hypertension, and diabetes are higher relative to the rest of the nation. A study reported that six Southern states have the worst incidence of sleep disturbances in the nation, attributing the disturbances to high rates of obesity and smoking. The South has a higher percentage of obese people and diabetics when compared to national regional averages. The region also has the largest number of people dying from stroke complications and the highest rates of cognitive decline. Life expectancy is lower and death rates are higher, when compared to national averages of other regions in the United States. This disparity reflects substantial divergence between the South and other regions since the middle of the 20th century. The East South Central Census Division of the United States (made up of Kentucky, Tennessee, Mississippi, and Alabama) had the highest rate of inpatient hospital stays in 2012. The other divisions, West South Central (Texas, Oklahoma, Arkansas and Louisiana) and South Atlantic (West Virginia, Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia and Florida) ranked seventh and fifth. The South had a significantly higher rate of hospital discharges in 2005 than other regions of the United States, but the rate had declined to be closer to the overall national rate by 2011. For cancer causes, the South, particularly an axis from West Virginia through Texas, leads the nation in adult obesity, adult smoking, low exercise, low fruit consumption, low vegetable consumption, all known cancer risk factors, which matches a similar high risk axis in "All Cancers Combined, Death Rates by State, 2011" from the Centers for Disease Control and Prevention. The South is home to some of the nation's largest academic health systems, including the Johns Hopkins Hospital, Duke University Health, University of Florida Health, UNC Medical Center, University of Miami Health, UT Health Science Center at Houston, Emory Healthcare, University of South Florida Health, and others. Politics In the first decades after Reconstruction in the 1880s and 1890s, white Democrats regained power in the state legislatures, and began to make voter registration more complicated, to reduce black voting. With a combination of intimidation, fraud and violence by paramilitary groups, they suppressed black voting and turned Republicans out of office. From 1890 to 1908, ten of eleven states ratified new constitutions or amendments that effectively disenfranchised most black voters and many poor white voters. This disenfranchisement persisted for six decades into the 20th century, depriving blacks and poor whites of all political representation. Because they could not vote, they could not sit on juries. They had no one to represent their interests, resulting in state legislatures consistently underfunding programs and services, such as schools, for blacks and poor whites. Scholars have characterized pockets of the Southern United States as being "authoritarian enclaves" from Reconstruction to the Civil Rights Act. With the collapse of the Republican Party in nearly all parts of the South, the region became known as the "Solid South", and the Democratic Party after 1900 moved to a system of primaries to select their candidates. Victory in a primary was tantamount to election. From the late 1870s to the 1960s, only rarely was a state or national Southern politician a Republican, outside from Southern Republican strongholds within the Appalachian mountain districts. Southern Republicans during this period would continue to control parts of the Appalachian Mountain areas and compete for power in the former Border States. Apart from a few states (such as the Byrd Machine in Virginia, the Crump Machine in Memphis), and a few other local organizations, the Democratic Party itself was very lightly organized. It managed primaries but party officials had little other role. To be successful a politician built his own network of friends, neighbors and allies. Reelection was the norm, and the result from 1910 to the late 20th century was that Southern Democrats in Congress had accumulated seniority, and automatically took the chairmanships of all committees. By the 1940s the Supreme Court began to find disenfranchisement measures like the "grandfather clause" and the white primary unconstitutional. Southern legislatures quickly passed other measures to keep blacks disenfranchised, even after suffrage was extended more widely to poor whites. Because white Democrats controlled all the Southern seats in the U.S. Congress, they had outsize power and could sidetrack or filibuster efforts to pass legislation they did not agree with. Increasing support for civil rights legislation by the national Democratic Party beginning in 1948 caused segregationist Southern Democrats to nominate Strom Thurmond on a third-party "Dixiecrat" ticket in 1948. These Dixiecrats returned to the party by 1950, but Southern Democrats held off Republican inroads in the suburbs by arguing that only they could defend the region from the onslaught of northern liberals and the civil rights movement. In response to the Brown v. Board of Education ruling of 1954, 101 Southern congressmen (19 senators, 82 House members of which 99 were Southern Democrats and 2 were Republicans) in 1956 denounced the Brown decisions as a "clear abuse of judicial power [that] climaxes a trend in the federal judiciary undertaking to legislate in derogation of the authority of Congress and to encroach upon the reserved rights of the states and the people." The manifesto lauded, "...those states which have declared the intention to resist enforced integration by any lawful means". It was signed by all Southern senators except Majority Leader Lyndon B. Johnson, and Tennessee senators Albert Gore Sr. and Estes Kefauver. Virginia closed schools in Warren County, Prince Edward County, Charlottesville, and Norfolk rather than integrate, but no other state followed suit. Democratic governors Orval Faubus of Arkansas, Ross Barnett of Mississippi, John Connally of Texas, Lester Maddox of Georgia, and, especially, George Wallace of Alabama resisted integration and appealed to a rural and blue-collar electorate. The northern Democrats' support of civil rights issues culminated when Democratic President Lyndon B. Johnson signed into law the Civil Rights Act of 1964 and the Voting Rights Act of 1965, which ended legal segregation and provided federal enforcement of voting rights for blacks. In the presidential election of 1964, Barry Goldwater's only electoral victories outside his home state of Arizona were in the states of the Deep South where few blacks could vote before the 1965 Voting Rights Act. Pockets of resistance to integration in public places broke out in violence during the 1960s by the shadowy Ku Klux Klan, which caused a backlash among moderates. Major resistance to school busing extended into the 1970s. National Republicans such as Richard Nixon began to develop their Southern strategy to attract conservative white Southerners, especially the middle class and suburban voters, in addition to migrants from the North and traditional GOP pockets in Appalachia. The transition to a Republican stronghold in the South took decades. First, the states started voting Republican in presidential elections, except for native Southerners Jimmy Carter in 1976 and Bill Clinton in 1992 and 1996. Then the states began electing Republican senators and finally governors. Georgia was the last state to do so, with Sonny Perdue taking the governorship in 2002. In addition to its middle class and business base, Republicans cultivated the religious right and attracted strong majorities from the evangelical or Fundamentalist vote, mostly Southern Baptists, which had not been a distinct political force prior to 1980. Southern liberals were an essential part of the New Deal coalition – without them Roosevelt lacked majorities in Congress. Typical leaders were Lyndon B. Johnson in Texas, Jim Folsom and John Sparkman in Alabama, Claude Pepper in Florida, Earl Long and Hale Boggs in Louisiana, and Estes Kefauver in Tennessee. They promoted subsidies for small farmers, and supported the nascent labor union movement. An essential condition for this north–south coalition was for northern liberals to ignore the problem of racism throughout the South and elsewhere in the country. After 1945, however, northern liberals – led especially by young Hubert Humphrey of Minnesota – increasingly made civil rights a central issue. They convinced Truman to join them in 1948. The conservative Southern Democrats – the Dixiecrats – took control of the state parties in half the region and ran Strom Thurmond for president against Truman. Thurmond carried only the Deep South, but that threat was enough to guarantee the national Democratic Party in 1952 and 1956 would not make civil rights a major issue. In 1956, 101 of the 128 southern congressmen and senators signed the Southern Manifesto denouncing forced desegregation. The labor movement in the South was divided, and lost its political influence. Southern liberals were in a quandary – most of them kept quiet or moderated their liberalism, others switched sides, and the rest continued on the liberal path. One by one, the last group was defeated; historian Numan V. Bartley states, "Indeed, the very word 'liberal' gradually disappeared from the southern political lexicon, except as a term of opprobrium." The South produced nine of the country's first twelve Presidents, including the Virginia Dynasty. After Zachary Taylor won the presidential election of 1848, no Southern politician was elected president until Woodrow Wilson in 1912. Andrew Johnson (of Tennessee) who was vice president in 1865, became president after the death of Abraham Lincoln. Out of the last eleven U.S. presidents, seven have Southern region ties: Lyndon B. Johnson (of Texas; 1963–69), Jimmy Carter (of Georgia; 1977–81), George H. W. Bush (of Texas; 1989–93), Bill Clinton (of Arkansas; 1993–2001), George W. Bush (of Texas; 2001–2009), Donald Trump (of Florida; 2017–2021, 2025–present), and Joe Biden (of Delaware; 2021–2025). Johnson was a native of Texas, while Carter is from Georgia, and Clinton from Arkansas. While George H. W. Bush and George W. Bush began their political careers in Texas, they were both born in New England and have their ancestral roots in that region. Similarly, while Joe Biden was born in Pennsylvania, he grew up largely in Delaware (classified as a Southern state by the U.S. Census Bureau) and spent his entire political career there. The South has produced various nationally known politicians and political movements. In 1948, a group of Democratic congressmen, led by Governor Strom Thurmond of South Carolina, split from the Democrats in reaction to an anti-segregation speech given by Minneapolis mayor and future senator Hubert Humphrey of Minnesota. They founded the States Rights Democratic or Dixiecrat Party. During that year's presidential election, the party ran Thurmond as its candidate and he carried four Deep South states. In the 1968 Presidential election, Alabama Governor George C. Wallace ran for president on the American Independent Party ticket. Wallace ran a "law and order" campaign similar to that of Republican candidate, Richard Nixon. Nixon's Southern Strategy of gaining electoral votes downplayed race issues and focused on culturally conservative values, such as family issues, patriotism, and cultural issues that appealed to Southern Baptists. In the 1994 mid-term elections, another Southern politician, Newt Gingrich, led the Republican Revolution, ushering in twelve years of GOP control of the House. Gingrich became Speaker of the United States House of Representatives in 1995 and served until his resignation in 1999. The incumbent Speaker of the House, Louisiana Republican Mike Johnson, is also from the South. Except for Bob Dole from Kansas (1985–96) and John Thune from South Dakota (2025-present), nearly all the recent Republican Senate Leaders have all been Southerners: Howard Baker (1981–1985) of Tennessee, Trent Lott (1996–2003) of Mississippi, Bill Frist (2003–2006) of Tennessee, and Mitch McConnell (2007–2024) of Kentucky. The Republican candidates for president have won the South in elections since 1972, except for 1976. The region is not, however, entirely monolithic, and every successful Democratic candidate has won at least 2 of the 11 former Confederate states. Barack Obama won Florida, Maryland, Delaware, North Carolina, and Virginia in 2008 but did not repeat his victory in North Carolina during his 2012 reelection campaign. Joe Biden also performed well for a modern Democrat in the South, winning Maryland, Delaware, Virginia, and Georgia, in the 2020 United States presidential election. As of 2025, all southern states except for Delaware, Maryland, Virginia, and West Virginia permit the death penalty. Race relations Native Americans have lived in what is now termed the American South for nearly 12,000 years. Increasing amounts of their land was taken until they were defeated by settlers in a series of conflicts ending in the War of 1812 and the Seminole Wars, and most of the surviving population was removed west to Indian Territory (now Oklahoma). The South witnessed two major events in the lives of 20th century African Americans: the Great Migration and the American Civil Rights Movement. The Great Migration began during World War I, hitting its high point during World War II. During this migration, Black people left the South to find work in Northern factories and other sectors of the economy. The migration also empowered the growing Civil Rights Movement. While the movement existed in all parts of the United States, its focus was against disenfranchisement and the Jim Crow laws in the South. Most of the major events in the movement occurred in the South, including the Montgomery bus boycott, the Mississippi Freedom Summer, the March on Selma, Alabama, and the assassination of Martin Luther King Jr. In addition, some of the most important writings to come out of the movement were written in the South, such as King's "Letter from Birmingham Jail". Most of the civil rights landmarks can be found around the South. The Birmingham Civil Rights National Monument in Birmingham includes the Birmingham Civil Rights Institute which details Birmingham's role as the center of the Civil Rights Movement. The 16th Street Baptist Church served as a rallying point for coordinating and carrying out the Birmingham campaign as well as the adjacent Kelly Ingram Park. This park served as ground zero for the infamous children's protest that eventually led to the passage of the Civil Rights Act of 1964; it has since been rededicated as a place of "Revolution and Reconciliation" and is now the setting of moving sculptures related to the battle for Civil Rights in the city. Both Kelly Ingram Park and the 16th Street Baptist Church are centerpieces of the Birmingham Civil Rights District. The Martin Luther King Jr. National Historical Park in Atlanta includes a museum that chronicles the American Civil Rights Movement as well as Martin Luther King Jr.'s boyhood home on Auburn Avenue. Additionally, Ebenezer Baptist Church is located in the Sweet Auburn district as is the King Center, the location of Martin Luther and Coretta Scott King's gravesites. During the 1950s and 1960s, the racial integration of all-white collegiate sports teams was high on the regional agenda. Involved in it were issues of racial equality, racism, and the alumni's demand for the top players who it needed to win high-profile games. The Atlantic Coast Conference (ACC) would take the lead. First, they started to schedule integrated teams from the North. The wake-up call came in 1966, when Don Haskins's Texas Western College team with five black starters, upset the all-white University of Kentucky team to win the NCAA national basketball championship. That happened at a time when there were no black varsity basketball teams in either the Southeastern Conference or the Southwest Conference. Finally ACC schools, typically under pressure from boosters and civil rights groups, integrated their sports teams. With an alumni base that dominated local and state politics, society and business, the ACC flagship schools were successful in their endeavor – as historian Pamela Grundy argues, they had learned how to win: The decisive action ending segregation came when Congress, in a bipartisan fashion, overcame Southern filibusters to pass the Civil Rights Act of 1964 and the Voting Rights Act of 1965. A complex interaction of factors came together unexpectedly in the period from 1954 to 1965 to make the momentous changes possible. The Supreme Court had taken the first initiative in Brown v. Board of Education (1954) making segregation of public schools unconstitutional. Enforcement was rapid in the North and border states but was deliberately stopped in the South by the movement called Massive Resistance, sponsored by rural segregationists who largely controlled the state legislatures. Southern liberals, who counseled moderation, were shouted down by both sides and had limited impact. Much more significant was the Civil Rights Movement, especially the Southern Christian Leadership Conference (SCLC) headed by Martin Luther King Jr. It largely displaced the old, much more moderate NAACP in taking leadership roles. King organized massive demonstrations, that seized massive media attention in an era when network television news was an innovative and universally watched phenomenon. SCLC, student activists and smaller local organizations staged demonstrations across the South. National attention focused on Birmingham, Alabama, where protesters deliberately provoked Bull Connor and his police forces by using young teenagers as demonstrators – and Connor arrested 900 in one day alone. The next day Connor unleashed billy clubs, police dogs, and high-pressure water hoses to disperse and punish the young demonstrators with a brutality that horrified the nation. It was very bad for business and the image of a modernizing progressive urban South. President John F. Kennedy, who had been calling for moderation, threatened to use federal troops to restore order in Birmingham. The result in Birmingham was a compromise by which the new mayor opened the library, golf courses, and other city facilities to both races, against the backdrop of church bombings and assassinations. Confrontations continued to escalate. In the summer of 1963, there were 800 demonstrations in 200 southern cities and towns, involving over 100,000 participants and 15,000 arrests. In Alabama in June 1963, Governor George Wallace escalated the crisis by defying court orders to admit the first two black students to the University of Alabama. Kennedy responded by sending Congress a comprehensive civil rights bill and ordered Attorney General Robert Kennedy to file federal lawsuits against segregated schools and to deny funds for discriminatory programs. Doctor King launched a massive march on Washington in August 1963, bringing out 200,000 demonstrators in front of the Lincoln Memorial, the largest political assembly in the nation's history. The Kennedy administration now gave full-fledged support to the civil rights movement, but powerful southern congressmen blocked any legislation. After Kennedy was assassinated President Lyndon Johnson called for immediate passage of Kennedy civil rights legislation as a memorial to the martyred president. Johnson formed a coalition with Northern Republicans that led to passage in the House, and with the help of Republican Senate leader Everett Dirksen with passage in the Senate early in 1964. For the first time in history, the southern filibuster was broken, and the Senate finally passed its version on June 19 by a vote of 73 to 27. The Civil Rights Act of 1964 was the most powerful affirmation of equal rights ever made by Congress. It guaranteed access to public accommodations such as restaurants and places of amusement, authorized the Justice Department to bring suits to desegregate facilities in schools, gave new powers to the Civil Rights Commission; and allowed federal funds to be cut off in cases of discrimination. Furthermore, racial, religious and gender discrimination was outlawed for businesses with 25 or more employees, as well as apartment houses. The South resisted until the last moment, but as soon as the new law was signed by President Johnson on July 2, 1964, it was widely accepted across the nation. There was only a scattering of diehard opposition, typified by restaurant owner Lester Maddox in Georgia, who became governor, but the great majority of restaurants and hotels in Georgia followed the new law as the business community realized that peaceful integration was the only way forward. Since the enactment of the Civil Rights Act of 1964 and Voting Rights Act of 1965, black people have gone on to hold many offices within the Southern states. Black people have been elected or appointed as mayors or police chiefs in the cities of Atlanta, Baltimore, Birmingham, Charlotte, Columbia, Dover, Houston, Jackson, Jacksonville, Memphis, Montgomery, Nashville, New Orleans, Raleigh, Richmond, and Washington. They have also gone on to serve in both the U.S. Congress and state legislatures of Southern states. The Civil Rights Movement of the 1950s and 1960s ended Jim Crow laws across the South and other areas of the United States. In recent decades, a second migration appears to be underway, this time with African Americans from the North moving to the South in record numbers. While race relations are still a contentious issue in the South and most of the U.S., the region surpasses the rest of the country in many areas of integration and racial equality. According to a 2003 report by researchers at the University of Wisconsin–Milwaukee, Virginia Beach, Charlotte, Nashville-Davidson, and Jacksonville were the five most integrated of the nation's fifty largest cities, with Memphis at number six. Southern states tend to have a low disparity in incarceration rates between blacks and whites relative to the rest of the country. The New Great Migration is not evenly distributed throughout the South. The rise in net gain points to Atlanta, Charlotte, Dallas, and Houston being a growing hot spots for the migrants of The New Great Migration. The percentage of Black Americans who live in the South has been increasing since 1990, and the biggest gains have been in the region's large urban areas, according to census data. The Black population of metro Atlanta more than doubled between 1990 and 2020, surpassing 2 million in the most recent census. The Black population also more than doubled in metro Charlotte while Greater Houston and Dallas-Fort Worth both saw their Black populations surpass 1 million for the first time. Several smaller metro areas also saw sizable gains, including San Antonio; Raleigh and Greensboro, North Carolina; and Orlando. Primary destinations are states that have the most job opportunities, especially Georgia, North Carolina, Maryland, Virginia, Tennessee, Florida and Texas. Other southern states, including Mississippi, Louisiana, South Carolina, Alabama and Arkansas, have seen little net growth in the African American population from return migration. Symbolism The Confederate battle flag is used as a symbol to identify the South, states' rights and Southern tradition. Such groups as the League of the South have a high regard for the secession movement of 1860, citing a desire to protect and defend Southern heritage. Numerous political battles have erupted nationally and within the South over flying the Confederate flag over state capitols, and the naming of public buildings or highways after Confederate leaders, the prominence of certain statues and monuments, and the everyday display of Confederate insignia. Other symbols of the South include the Bonnie Blue Flag, magnolia trees, and the song "Dixie". Population centers The South was predominately rural up until the 1940s. Since the mid-20th century, the population has increasingly grown in urban and metropolitan areas. The following tables show the twenty largest cities, counties, metropolitan and combined statistical areas in the South. Houston is the largest city in the Southern United States. * Asterisk indicates part of the metropolitan area is outside the states classified as Southern by the U.S. Census Bureau. Southern states Listed below are states that are defined by the Census Bureau as the Southern United States. Washington, D.C. is located in the Southern United States region as defined by the Census Bureau, but serves as the capital city of the United States, and is not a state. See also References Further reading External links
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Contents History of the Jews in Kazakhstan Jewish history in Kazakhstan General Secretary Joseph Stalin evacuated thousands of Ashkenazi Jews from other parts of the Soviet Union to the Kazakh SSR. During the Holocaust 8,218 Jews were evacuated to Kazakhstan between August 1941 and January 1942. Some Bukharan Jews, Mountain Jews, Georgian Jews, and Iranian Jews also lived in Kazakhstan. A Chabad-Lubavitch synagogue in Almaty is named after Rabbi Levi Yitzchak Schneerson, father of the Rebbe, who is buried at the city's cemetery, close to the synagogue. Levi Yitzchak Schneerson was exiled to Kazakhstan from Ukraine, Dnepropetrovsk, where he was a chief rabbi. Lubavitcher Jews from all over the world come to pray at his grave. Yeshaya E. Cohen, the Chief Rabbi of Kazakhstan, and leader of the Alliance of Rabbis in Islamic States told Kazinform on January 16, 2004 that a new synagogue would be built in Astana. He thanked President Nazarbayev for "paying so much attention to distinguishing between those who truly believe and those who want to hijack their religion." President of the Euro-Asian Jewish Congress, presented Nazarbayev with a menorah on 7 September 2004. Historical demographics Kazakhstan's Jewish population rapidly increased between 1926 and 1959, being almost eight times larger in 1959 than in 1926. Kazakhstan's Jewish population slowly declined between 1959 and 1989, followed by a much larger decline after the fall of Communism between 1989 and 2002 due to massive Jewish emigration, mostly to Israel. Jewish Kazakh fencer Yakov Rylsky (1928–1999) was a Soviet Olympic and world champion sabre fencer. Jewish life today At present, there are several thousand Jews in Kazakhstan, most of whom are Ashkenazi Jews. There are estimated to be approximately four dozen Persian Jewish families living in Kazakhstan, which call themselves Lakhloukh and speak Aramaic. They still hold identity papers from Iran, the country their ancestors left almost 80 years ago. These Persian Jews lived near the border of Iran and commonly practiced trade to sustain their communities. The most popular Lakhloukh Jewish family being the Malihi family, whom are all descendants of Jaha Malihi (A noble in the Persian Empire) There are synagogues and large Jewish communities in Almaty where there are 1,000 Jews in Astana and Pavlodar. Most of the Neo-Aramaic speaking Jews of Salmas now reside in Almaty. There are smaller communities in Karaganda, Shymkent, Semey, Kokshetau, Taraz, Oral, Aktobe, and Petropavl. There are twenty Jewish Kazakh organizations, including the Mitzvah Association, Chabad, the American Jewish Joint Distribution Committee, Jewish Agency for Israel, and the All-Kazakhstan Jewish Congress (AKJC). The Jewish communities formed the AKJC in December 1999 in a ceremony attended by Kazakh government officials and United States Ambassador to Kazakhstan, Richard Jones. There are fourteen Jewish day schools attended by more than 700 students. There is a Jewish kindergarten in Almaty. Between 2005 and 2006 attendance in religious services and education in Almaty among Jews greatly increased. The government of Kazakhstan registered eight foreign rabbis and "Jewish missionaries". It has also donated buildings and land for the building of new synagogues. According to the National Coalition Supporting Soviet Jewry, "Antisemitism is not prevalent in Kazakhstan and rare incidents are reported in the press," contrary to incorrect perceptions in popular culture caused by the country's portrayal in the 2006 film Borat as a "hot-bed of Antisemitism." See also Notes References Further reading External links
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[SOURCE: https://en.wikipedia.org/wiki/Bighorn_sheep] \| [TOKENS: 2891]
Contents Bighorn sheep O. cervina Desmarest O. montana Cuvier The bighorn sheep (Ovis canadensis) or bighorn is a species of sheep native to North America. It is named for its large horns. A pair of horns may weigh up to 14 kg (30 lb); the sheep typically weigh up to 143 kg (315 lb). Recent genetic testing indicates three distinct subspecies of Ovis canadensis, one of which is endangered: O. c. sierrae. Sheep originally crossed to North America over the Bering Land Bridge from Siberia; the population in North America peaked in the millions, and the bighorn sheep entered into the mythology of Native Americans. By 1900, the population had crashed to several thousand due to diseases introduced through European livestock and overhunting. Taxonomy and genetics Ovis canadensis is one of two species of mountain sheep in North America; the other species being O. dalli, the Dall sheep. Wild sheep crossed the Bering land bridge from Siberia into Alaska during the Pleistocene (about 750,000 years ago); subsequently, they spread through western North America as far south as Baja California and northwestern mainland Mexico. Divergence from their closest Asian ancestor (snow sheep) occurred about 600,000 years ago. In North America, wild sheep diverged into two extant species — Dall sheep, which occupy Alaska and northwestern Canada, and bighorn sheep, which range from southwestern Canada to Mexico. However, the status of these species is questionable given that hybridization has occurred between them in their recent evolutionary history. In 1940, Ian McTaggart-Cowan split the species into seven subspecies, with the first three being mountain bighorns and the last four being desert bighorns: Starting in 1993, Ramey and colleagues, using DNA testing, have shown this division into seven subspecies is largely illusory. Most scientists currently recognize three subspecies of bighorn. This taxonomy is supported by the most extensive genetics (microsatellite and mitochondrial DNA) study to date (2016) which found high divergence between Rocky Mountain and Sierra Nevada bighorn sheep, and that these two subspecies both diverged from desert bighorn before or during the Illinoian glaciation (about 315–94 thousand years ago). Thus, the three subspecies of O. canadensis are: In addition, two populations are currently considered endangered by the United States government: Description Bighorn sheep are named for the large, curved horns borne by the rams (males). Ewes (females) also have horns, but they are shorter and straighter. They range in color from light brown to grayish or dark, chocolate brown, with a white rump and lining on the backs of all four legs. Males typically weigh 58–143 kg (128–315 lb), are 90–105 cm (35–41 in) tall at the shoulder, and 1.6–1.85 m (63–73 in) long from the nose to the tail. Females are typically 34–91 kg (75–201 lb), 75–90 cm (30–35 in) tall, and 1.28–1.58 m (50–62 in) long. Male bighorn sheep have large horn cores, enlarged cornual and frontal sinuses, and internal bony septa. These adaptations serve to protect the brain by absorbing the impact of clashes. Bighorn sheep have preorbital glands on the anterior corner of each eye, inguinal glands in the groin, and pedal glands on each foot. Secretions from these glands may support dominance behaviors. Bighorns from the Rocky Mountains are relatively large, with males that occasionally exceed 230 kg (500 lb) and females that exceed 90 kg (200 lb). In contrast, Sierra Nevada bighorn males weigh up to only 90 kg (198 lb) and females to 60 kg (132 lb). Males' horns can weigh up to 14 kg (30 lb), as much as all the bones in the male's body. Natural history The Rocky Mountain and Sierra Nevada bighorn sheep occupy the cooler mountainous regions of Canada and the United States. In contrast, the desert bighorn sheep subspecies are indigenous to the hot desert ecosystems of the Southwestern United States and Mexico. Bighorn sheep inhabit alpine meadows, grassy mountain slopes, and foothill country near rugged, rocky cliffs and bluffs. Since bighorn sheep cannot move through deep snow, they prefer drier slopes, where the annual snowfall is less than about 150 cm (60 in) per year. A bighorn's winter range usually has lower elevations than its summer range. Bighorn sheep are highly susceptible to certain diseases carried by domestic sheep, such as psoroptic scabies and pneumonia; additional mortality occurs as a result of accidents involving rock falls or falling off cliffs (a hazard of living in steep, rugged terrain). Bighorns are well adapted to climbing steep terrain, where they seek cover from predators. Lambs are the most susceptible to predation, with potential predators including coyotes, bobcats, gray foxes, wolverines, jaguars, ocelots, lynxes, and golden eagles. Bighorn sheep of all ages are threatened by black bears, grizzly bears, wolves, and especially mountain lions, which are perhaps best equipped with the agility to prey on them in uneven, rocky habitats. Fire suppression techniques may limit visibility through shrublands, and therefore increase cover and predation rates by mountain lions. Bighorn sheep are considered good indicators of land health because the species is sensitive to many human-induced environmental problems. In addition to their aesthetic value, bighorn sheep are considered desirable game animals by hunters. Bighorn sheep graze on grasses and browse shrubs, particularly in fall and winter, and seek minerals at natural salt licks. Females tend to forage and walk, possibly to avoid predators and protect lambs, while males tend to eat and then rest and ruminate, which lends to more effective digestion and greater increase in body size. Bighorn sheep live in large herds and do not typically follow a single leader ram, unlike the mouflon, the ancestor of the domestic sheep, which has a strict dominance hierarchy. Before the mating season or "rut", the rams attempt to establish a dominance hierarchy to determine access to ewes for mating. During the pre-rut period, most of the characteristic horn clashing occurs between rams, although this behavior may occur to a limited extent throughout the year. Bighorn rams exhibit agonistic behavior: two competitors walk away from each other and then turn to face each other before jumping and lunging into headbutts. Rams' horns are often missing their tips, or "broomed". Broomed horns are a natural consequence of frequent sparring between rams. Females exhibit a stable, nonlinear hierarchy that correlates with age. Females may fight for high social status when they are integrated into the hierarchy at one to two years of age. Rocky Mountain bighorn rams employ at least three different courting strategies. The most common and successful is the tending strategy, in which a ram follows and defends an estrous ewe. Tending takes considerable strength and vigilance, and ewes are most receptive to tending males, presumably feeling they are the most fit. Another tactic is coursing, when rams fight for an already tended ewe. Ewes typically avoid coursing males, so the strategy is ineffective. The rams also employ a blocking strategy. They prevent a ewe from accessing tending areas before she even enters estrus. Bighorn ewes have a six-month gestation. In temperate climates, the peak of the rut occurs in November, with one, or rarely two, lambs being born in May. Most births occur in the first two weeks of the lambing period. Pregnant ewes of the Rocky Mountains migrate to alpine areas in spring, presumably to give birth in areas safer from predation, but are away from areas with good quality forage. Lambs born earlier in the season are more likely to survive than lambs born later. Lambs born late may not have access to sufficient milk, as their mothers are lactating at a time when food quality is lower. Newborn lambs weigh from 3.6 to 4.5 kg (8 to 10 lb) and can walk within hours. The lambs are then weaned when they reach four to six months old. The lifespan of ewes is typically 10–14 years and 9–12 years for rams. Many bighorn sheep populations in the United States experience regular outbreaks of infectious pneumonia, which likely result from the introduction of bacterial pathogens (in particular, Mycoplasma ovipneumoniae, and some strains of Mannheimia haemolytica) carried asymptomatically in domestic sheep. Once introduced, pathogens can transmit rapidly through a bighorn population, resulting in all-age die-offs that sometimes kill up to 90% of the population. In the years following pathogen introduction, bighorn populations frequently experience multiple years of lamb pneumonia outbreaks. These outbreaks can severely limit recruitment and likely play a powerful role in slowing population growth. Relationship with humans Bighorn sheep were widespread throughout the western United States, Canada, and northern Mexico two hundred years ago. The population was estimated to be 150,000 to 200,000. Unregulated hunting, habitat destruction, overgrazing of rangelands, and diseases contracted from domestic livestock all contributed to the decline, the most drastic occurring from about 1870 through 1950. In 1936, the Arizona Boy Scouts mounted a statewide campaign to save the bighorn sheep. The scouts first became interested in the sheep through the efforts of Major Frederick Russell Burnham. Burnham observed that fewer than 150 of these sheep still lived in the Arizona mountains. The National Wildlife Federation, the Izaak Walton League, and the National Audubon Society also joined the effort. On January 18, 1939, over 600,000 hectares (1,500,000 acres) of land were set aside to create the Kofa National Wildlife Refuge and the Cabeza Prieta National Wildlife Refuge. Many state and federal agencies have actively pursued the restoration of bighorn sheep since the 1940s. However, these efforts have met with limited success, and most of the historical range of bighorns remains unoccupied. Hunting for male bighorn sheep is allowed, but heavily regulated, in Canada and the United States. Bighorn sheep were among the most admired animals of the Apsaalooka (Crow) people, and what is today called the Bighorn Mountain Range was central to the Apsaalooka tribal lands. In the Bighorn Canyon National Recreation Area book, storyteller Old Coyote describes a legend related to the bighorn sheep. A man possessed by evil spirits attempts to kill his heir by pushing the young man over a cliff, but the victim is saved by getting caught in trees. Rescued by bighorn sheep, the man takes the name of their leader, Big Metal. The other sheep grant him power, wisdom, sharp eyes, sure-footedness, keen ears, great strength, and a strong heart. Big Metal returns to his people with the message that the Apsaalooka people will survive only so long as the river winding out of the mountains is known as the Bighorn River. Bighorn sheep are hunted for their meat and horns, used in ceremonies, as food, and as hunting trophies. They also serve as a source of ecotourism, as tourists come to see the bighorn sheep in their native habitat. The Rocky Mountain bighorn sheep is the provincial mammal of Alberta and the state animal of Colorado and, as such, is incorporated into the symbol for the Colorado Division of Parks and Wildlife. The Desert bighorn sheep is the state mammal of Nevada. The Bighorn sheep was featured in the children's book Buford the Little Bighorn (1967) by Bill Peet. The Bighorn sheep named Buford has a huge pair of horns in the Spring, Summer, Fall, and Winter, similar to Rudolph the Red-Nosed Reindeer. Bighorn sheep were once known by the scientific identification "argali" or "argalia" due to assumption that they were the same animal as the Asiatic argali (Ovis ammon). Lewis and Clark recorded numerous sightings of O. canadensis in the journals of their exploration—sometimes using the name argalia. In addition, they recorded the use of bighorn sheep horns by the Shoshone in making composite bows. William Clark's Track Map produced after the expedition in 1814 indicated a tributary of the Yellowstone River named Argalia Creek and a tributary of the Missouri River named Argalia River, both in what is today Montana. Neither of these tributaries retained these names, however. The Bighorn River, another tributary of the Yellowstone, and its tributary stream, the Little Bighorn River, were both indicated on Clark's map and did retain their names, the latter being the namesake of the Battle of the Little Bighorn. The Bighorn Ram was featured in a series of prints by artist Andy Warhol. In 1983, the artist was commissioned to create a portfolio of ten endangered species to raise environmental awareness. The portfolio, known as "Endangered Species" was created in support of the Endangered Species Act, which was passed by the U.S. Congress in 1973. Other animals within the portfolio include the Siberian tiger, bald eagle and the giant panda. Notes References External links
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Contents Elon Musk Elon Reeve Musk (/ˈiːlɒn/ EE-lon; born June 28, 1971) is a businessman and entrepreneur known for his leadership of Tesla, SpaceX, Twitter, and xAI. Musk has been the wealthiest person in the world since 2025; as of February 2026,[update] Forbes estimates his net worth to be around US$852 billion. Born into a wealthy family in Pretoria, South Africa, Musk emigrated in 1989 to Canada; he has Canadian citizenship since his mother was born there. He received bachelor's degrees in 1997 from the University of Pennsylvania before moving to California to pursue business ventures. In 1995, Musk co-founded the software company Zip2. Following its sale in 1999, he co-founded X.com, an online payment company that later merged to form PayPal, which was acquired by eBay in 2002. Musk also became an American citizen in 2002. In 2002, Musk founded the space technology company SpaceX, becoming its CEO and chief engineer; the company has since led innovations in reusable rockets and commercial spaceflight. Musk joined the automaker Tesla as an early investor in 2004 and became its CEO and product architect in 2008; it has since become a leader in electric vehicles. In 2015, he co-founded OpenAI to advance artificial intelligence (AI) research, but later left; growing discontent with the organization's direction and their leadership in the AI boom in the 2020s led him to establish xAI, which became a subsidiary of SpaceX in 2026. In 2022, he acquired the social network Twitter, implementing significant changes, and rebranding it as X in 2023. His other businesses include the neurotechnology company Neuralink, which he co-founded in 2016, and the tunneling company the Boring Company, which he founded in 2017. In November 2025, a Tesla pay package worth $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Musk was the largest donor in the 2024 U.S. presidential election, where he supported Donald Trump. After Trump was inaugurated as president in early 2025, Musk served as Senior Advisor to the President and as the de facto head of the Department of Government Efficiency (DOGE). After a public feud with Trump, Musk left the Trump administration and returned to managing his companies. Musk is a supporter of global far-right figures, causes, and political parties. His political activities, views, and statements have made him a polarizing figure. Musk has been criticized for COVID-19 misinformation, promoting conspiracy theories, and affirming antisemitic, racist, and transphobic comments. His acquisition of Twitter was controversial due to a subsequent increase in hate speech and the spread of misinformation on the service, following his pledge to decrease censorship. His role in the second Trump administration attracted public backlash, particularly in response to DOGE. The emails he sent to Jeffrey Epstein are included in the Epstein files, which were published between 2025–26 and became a topic of worldwide debate. Early life Elon Reeve Musk was born on June 28, 1971, in Pretoria, South Africa's administrative capital. He is of British and Pennsylvania Dutch ancestry. His mother, Maye (née Haldeman), is a model and dietitian born in Saskatchewan, Canada, and raised in South Africa. Musk therefore holds both South African and Canadian citizenship from birth. His father, Errol Musk, is a South African electromechanical engineer, pilot, sailor, consultant, emerald dealer, and property developer, who partly owned a rental lodge at Timbavati Private Nature Reserve. His maternal grandfather, Joshua N. Haldeman, who died in a plane crash when Elon was a toddler, was an American-born Canadian chiropractor, aviator and political activist in the technocracy movement who moved to South Africa in 1950. Elon has a younger brother, Kimbal, a younger sister, Tosca, and four paternal half-siblings. Musk was baptized as a child in the Anglican Church of Southern Africa. Despite both Elon and Errol previously stating that Errol was a part owner of a Zambian emerald mine, in 2023, Errol recounted that the deal he made was to receive "a portion of the emeralds produced at three small mines". Errol was elected to the Pretoria City Council as a representative of the anti-apartheid Progressive Party and has said that his children shared their father's dislike of apartheid. After his parents divorced in 1979, Elon, aged around 9, chose to live with his father because Errol Musk had an Encyclopædia Britannica and a computer. Elon later regretted his decision and became estranged from his father. Elon has recounted trips to a wilderness school that he described as a "paramilitary Lord of the Flies" where "bullying was a virtue" and children were encouraged to fight over rations. In one incident, after an altercation with a fellow pupil, Elon was thrown down concrete steps and beaten severely, leading to him being hospitalized for his injuries. Elon described his father berating him after he was discharged from the hospital. Errol denied berating Elon and claimed, "The [other] boy had just lost his father to suicide, and Elon had called him stupid. Elon had a tendency to call people stupid. How could I possibly blame that child?" Elon was an enthusiastic reader of books, and had attributed his success in part to having read The Lord of the Rings, the Foundation series, and The Hitchhiker's Guide to the Galaxy. At age ten, he developed an interest in computing and video games, teaching himself how to program from the VIC-20 user manual. At age twelve, Elon sold his BASIC-based game Blastar to PC and Office Technology magazine for approximately $500 (equivalent to $1,600 in 2025). Musk attended Waterkloof House Preparatory School, Bryanston High School, and then Pretoria Boys High School, where he graduated. Musk was a decent but unexceptional student, earning a 61/100 in Afrikaans and a B on his senior math certification. Musk applied for a Canadian passport through his Canadian-born mother to avoid South Africa's mandatory military service, which would have forced him to participate in the apartheid regime, as well as to ease his path to immigration to the United States. While waiting for his application to be processed, he attended the University of Pretoria for five months. Musk arrived in Canada in June 1989, connected with a second cousin in Saskatchewan, and worked odd jobs, including at a farm and a lumber mill. In 1990, he entered Queen's University in Kingston, Ontario. Two years later, he transferred to the University of Pennsylvania, where he studied until 1995. Although Musk has said that he earned his degrees in 1995, the University of Pennsylvania did not award them until 1997 – a Bachelor of Arts in physics and a Bachelor of Science in economics from the university's Wharton School. He reportedly hosted large, ticketed house parties to help pay for tuition, and wrote a business plan for an electronic book-scanning service similar to Google Books. In 1994, Musk held two internships in Silicon Valley: one at energy storage startup Pinnacle Research Institute, which investigated electrolytic supercapacitors for energy storage, and another at Palo Alto–based startup Rocket Science Games. In 1995, he was accepted to a graduate program in materials science at Stanford University, but did not enroll. Musk decided to join the Internet boom of the 1990s, applying for a job at Netscape, to which he reportedly never received a response. The Washington Post reported that Musk lacked legal authorization to remain and work in the United States after failing to enroll at Stanford. In response, Musk said he was allowed to work at that time and that his student visa transitioned to an H1-B. According to numerous former business associates and shareholders, Musk said he was on a student visa at the time. Business career In 1995, Musk, his brother Kimbal, and Greg Kouri founded the web software company Zip2 with funding from a group of angel investors. They housed the venture at a small rented office in Palo Alto. Replying to Rolling Stone, Musk denounced the notion that they started their company with funds borrowed from Errol Musk, but in a tweet, he recognized that his father contributed 10% of a later funding round. The company developed and marketed an Internet city guide for the newspaper publishing industry, with maps, directions, and yellow pages. According to Musk, "The website was up during the day and I was coding it at night, seven days a week, all the time." To impress investors, Musk built a large plastic structure around a standard computer to create the impression that Zip2 was powered by a small supercomputer. The Musk brothers obtained contracts with The New York Times and the Chicago Tribune, and persuaded the board of directors to abandon plans for a merger with CitySearch. Musk's attempts to become CEO were thwarted by the board. Compaq acquired Zip2 for $307 million in cash in February 1999 (equivalent to $590,000,000 in 2025), and Musk received $22 million (equivalent to $43,000,000 in 2025) for his 7-percent share. In 1999, Musk co-founded X.com, an online financial services and e-mail payment company. The startup was one of the first federally insured online banks, and, in its initial months of operation, over 200,000 customers joined the service. The company's investors regarded Musk as inexperienced and replaced him with Intuit CEO Bill Harris by the end of the year. The following year, X.com merged with online bank Confinity to avoid competition. Founded by Max Levchin and Peter Thiel, Confinity had its own money-transfer service, PayPal, which was more popular than X.com's service. Within the merged company, Musk returned as CEO. Musk's preference for Microsoft software over Unix created a rift in the company and caused Thiel to resign. Due to resulting technological issues and lack of a cohesive business model, the board ousted Musk and replaced him with Thiel in 2000.[b] Under Thiel, the company focused on the PayPal service and was renamed PayPal in 2001. In 2002, PayPal was acquired by eBay for $1.5 billion (equivalent to $2,700,000,000 in 2025) in stock, of which Musk—the largest shareholder with 11.72% of shares—received $175.8 million (equivalent to $320,000,000 in 2025). In 2017, Musk purchased the domain X.com from PayPal for an undisclosed amount, stating that it had sentimental value. In 2001, Musk became involved with the nonprofit Mars Society and discussed funding plans to place a growth-chamber for plants on Mars. Seeking a way to launch the greenhouse payloads into space, Musk made two unsuccessful trips to Moscow to purchase intercontinental ballistic missiles (ICBMs) from Russian companies NPO Lavochkin and Kosmotras. Musk instead decided to start a company to build affordable rockets. With $100 million of his early fortune, (equivalent to $180,000,000 in 2025) Musk founded SpaceX in May 2002 and became the company's CEO and Chief Engineer. SpaceX attempted its first launch of the Falcon 1 rocket in 2006. Although the rocket failed to reach Earth orbit, it was awarded a Commercial Orbital Transportation Services program contract from NASA, then led by Mike Griffin. After two more failed attempts that nearly caused Musk to go bankrupt, SpaceX succeeded in launching the Falcon 1 into orbit in 2008. Later that year, SpaceX received a $1.6 billion NASA contract (equivalent to $2,400,000,000 in 2025) for Falcon 9-launched Dragon spacecraft flights to the International Space Station (ISS), replacing the Space Shuttle after its 2011 retirement. In 2012, the Dragon vehicle docked with the ISS, a first for a commercial spacecraft. Working towards its goal of reusable rockets, in 2015 SpaceX successfully landed the first stage of a Falcon 9 on a land platform. Later landings were achieved on autonomous spaceport drone ships, an ocean-based recovery platform. In 2018, SpaceX launched the Falcon Heavy; the inaugural mission carried Musk's personal Tesla Roadster as a dummy payload. Since 2019, SpaceX has been developing Starship, a reusable, super heavy-lift launch vehicle intended to replace the Falcon 9 and Falcon Heavy. In 2020, SpaceX launched its first crewed flight, the Demo-2, becoming the first private company to place astronauts into orbit and dock a crewed spacecraft with the ISS. In 2024, NASA awarded SpaceX an $843 million (equivalent to $865,000,000 in 2025) contract to build a spacecraft that NASA will use to deorbit the ISS at the end of its lifespan. In 2015, SpaceX began development of the Starlink constellation of low Earth orbit satellites to provide satellite Internet access. After the launch of prototype satellites in 2018, the first large constellation was deployed in May 2019. As of May 2025[update], over 7,600 Starlink satellites are operational, comprising 65% of all operational Earth satellites. The total cost of the decade-long project to design, build, and deploy the constellation was estimated by SpaceX in 2020 to be $10 billion (equivalent to $12,000,000,000 in 2025).[c] During the Russian invasion of Ukraine, Musk provided free Starlink service to Ukraine, permitting Internet access and communication at a yearly cost to SpaceX of $400 million (equivalent to $440,000,000 in 2025). However, Musk refused to block Russian state media on Starlink. In 2023, Musk denied Ukraine's request to activate Starlink over Crimea to aid an attack against the Russian navy, citing fears of a nuclear response. Tesla, Inc., originally Tesla Motors, was incorporated in July 2003 by Martin Eberhard and Marc Tarpenning. Both men played active roles in the company's early development prior to Musk's involvement. Musk led the Series A round of investment in February 2004; he invested $6.35 million (equivalent to $11,000,000 in 2025), became the majority shareholder, and joined Tesla's board of directors as chairman. Musk took an active role within the company and oversaw Roadster product design, but was not deeply involved in day-to-day business operations. Following a series of escalating conflicts in 2007 and the 2008 financial crisis, Eberhard was ousted from the firm.[page needed] Musk assumed leadership of the company as CEO and product architect in 2008. A 2009 lawsuit settlement with Eberhard designated Musk as a Tesla co-founder, along with Tarpenning and two others. Tesla began delivery of the Roadster, an electric sports car, in 2008. With sales of about 2,500 vehicles, it was the first mass production all-electric car to use lithium-ion battery cells. Under Musk, Tesla has since launched several well-selling electric vehicles, including the four-door sedan Model S (2012), the crossover Model X (2015), the mass-market sedan Model 3 (2017), the crossover Model Y (2020), and the pickup truck Cybertruck (2023). In May 2020, Musk resigned as chairman of the board as part of the settlement of a lawsuit from the SEC over him tweeting that funding had been "secured" for potentially taking Tesla private. The company has also constructed multiple lithium-ion battery and electric vehicle factories, called Gigafactories. Since its initial public offering in 2010, Tesla stock has risen significantly; it became the most valuable carmaker in summer 2020, and it entered the S&P 500 later that year. In October 2021, it reached a market capitalization of $1 trillion (equivalent to $1,200,000,000,000 in 2025), the sixth company in U.S. history to do so. Musk provided the initial concept and financial capital for SolarCity, which his cousins Lyndon and Peter Rive founded in 2006. By 2013, SolarCity was the second largest provider of solar power systems in the United States. In 2014, Musk promoted the idea of SolarCity building an advanced production facility in Buffalo, New York, triple the size of the largest solar plant in the United States. Construction of the factory started in 2014 and was completed in 2017. It operated as a joint venture with Panasonic until early 2020. Tesla acquired SolarCity for $2 billion in 2016 (equivalent to $2,700,000,000 in 2025) and merged it with its battery unit to create Tesla Energy. The deal's announcement resulted in a more than 10% drop in Tesla's stock price; at the time, SolarCity was facing liquidity issues. Multiple shareholder groups filed a lawsuit against Musk and Tesla's directors, stating that the purchase of SolarCity was done solely to benefit Musk and came at the expense of Tesla and its shareholders. Tesla directors settled the lawsuit in January 2020, leaving Musk the sole remaining defendant. Two years later, the court ruled in Musk's favor. In 2016, Musk co-founded Neuralink, a neurotechnology startup, with an investment of $100 million. Neuralink aims to integrate the human brain with artificial intelligence (AI) by creating devices that are embedded in the brain. Such technology could enhance memory or allow the devices to communicate with software. The company also hopes to develop devices to treat neurological conditions like spinal cord injuries. In 2022, Neuralink announced that clinical trials would begin by the end of the year. In September 2023, the Food and Drug Administration approved Neuralink to initiate six-year human trials. Neuralink has conducted animal testing on macaques at the University of California, Davis. In 2021, the company released a video in which a macaque played the video game Pong via a Neuralink implant. The company's animal trials—which have caused the deaths of some monkeys—have led to claims of animal cruelty. The Physicians Committee for Responsible Medicine has alleged that Neuralink violated the Animal Welfare Act. Employees have complained that pressure from Musk to accelerate development has led to botched experiments and unnecessary animal deaths. In 2022, a federal probe was launched into possible animal welfare violations by Neuralink.[needs update] In 2017, Musk founded the Boring Company to construct tunnels; he also revealed plans for specialized, underground, high-occupancy vehicles that could travel up to 150 miles per hour (240 km/h) and thus circumvent above-ground traffic in major cities. Early in 2017, the company began discussions with regulatory bodies and initiated construction of a 30-foot (9.1 m) wide, 50-foot (15 m) long, and 15-foot (4.6 m) deep "test trench" on the premises of SpaceX's offices, as that required no permits. The Los Angeles tunnel, less than two miles (3.2 km) in length, debuted to journalists in 2018. It used Tesla Model Xs and was reported to be a rough ride while traveling at suboptimal speeds. Two tunnel projects announced in 2018, in Chicago and West Los Angeles, have been canceled. A tunnel beneath the Las Vegas Convention Center was completed in early 2021. Local officials have approved further expansions of the tunnel system. April 14, 2022 In early 2017, Musk expressed interest in buying Twitter and had questioned the platform's commitment to freedom of speech. By 2022, Musk had reached 9.2% stake in the company, making him the largest shareholder.[d] Musk later agreed to a deal that would appoint him to Twitter's board of directors and prohibit him from acquiring more than 14.9% of the company. Days later, Musk made a $43 billion offer to buy Twitter. By the end of April Musk had successfully concluded his bid for approximately $44 billion. This included approximately $12.5 billion in loans and $21 billion in equity financing. Having backtracked on his initial decision, Musk bought the company on October 27, 2022. Immediately after the acquisition, Musk fired several top Twitter executives including CEO Parag Agrawal; Musk became the CEO instead. Under Elon Musk, Twitter instituted monthly subscriptions for a "blue check", and laid off a significant portion of the company's staff. Musk lessened content moderation and hate speech also increased on the platform after his takeover. In late 2022, Musk released internal documents relating to Twitter's moderation of Hunter Biden's laptop controversy in the lead-up to the 2020 presidential election. Musk also promised to step down as CEO after a Twitter poll, and five months later, Musk stepped down as CEO and transitioned his role to executive chairman and chief technology officer (CTO). Despite Musk stepping down as CEO, X continues to struggle with challenges such as viral misinformation, hate speech, and antisemitism controversies. Musk has been accused of trying to silence some of his critics such as Twitch streamer Asmongold, who criticized him during one of his streams. Musk has been accused of removing their accounts' blue checkmarks, which hinders visibility and is considered a form of shadow banning, or suspending their accounts without justification. Other activities In August 2013, Musk announced plans for a version of a vactrain, and assigned engineers from SpaceX and Tesla to design a transport system between Greater Los Angeles and the San Francisco Bay Area, at an estimated cost of $6 billion. Later that year, Musk unveiled the concept, dubbed the Hyperloop, intended to make travel cheaper than any other mode of transport for such long distances. In December 2015, Musk co-founded OpenAI, a not-for-profit artificial intelligence (AI) research company aiming to develop artificial general intelligence, intended to be safe and beneficial to humanity. Musk pledged $1 billion of funding to the company, and initially gave $50 million. In 2018, Musk left the OpenAI board. Since 2018, OpenAI has made significant advances in machine learning. In July 2023, Musk launched the artificial intelligence company xAI, which aims to develop a generative AI program that competes with existing offerings like OpenAI's ChatGPT. Musk obtained funding from investors in SpaceX and Tesla, and xAI hired engineers from Google and OpenAI. December 16, 2022 Musk uses a private jet owned by Falcon Landing LLC, a SpaceX-linked company, and acquired a second jet in August 2020. His heavy use of the jets and the consequent fossil fuel usage have received criticism. Musk's flight usage is tracked on social media through ElonJet. In December 2022, Musk banned the ElonJet account on Twitter, and made temporary bans on the accounts of journalists that posted stories regarding the incident, including Donie O'Sullivan, Keith Olbermann, and journalists from The New York Times, The Washington Post, CNN, and The Intercept. In October 2025, Musk's company xAI launched Grokipedia, an AI-generated online encyclopedia that he promoted as an alternative to Wikipedia. Articles on Grokipedia are generated and reviewed by xAI's Grok chatbot. Media coverage and academic analysis described Grokipedia as frequently reusing Wikipedia content but framing contested political and social topics in line with Musk's own views and right-wing narratives. A study by Cornell University researchers and NBC News stated that Grokipedia cites sources that are blacklisted or considered "generally unreliable" on Wikipedia, for example, the conspiracy site Infowars and the neo-Nazi forum Stormfront. Wired, The Guardian and Time criticized Grokipedia for factual errors and for presenting Musk himself in unusually positive terms while downplaying controversies. Politics Musk is an outlier among business leaders who typically avoid partisan political advocacy. Musk was a registered independent voter when he lived in California. Historically, he has donated to both Democrats and Republicans, many of whom serve in states in which he has a vested interest. Since 2022, his political contributions have mostly supported Republicans, with his first vote for a Republican going to Mayra Flores in the 2022 Texas's 34th congressional district special election. In 2024, he started supporting international far-right political parties, activists, and causes, and has shared misinformation and numerous conspiracy theories. Since 2024, his views have been generally described as right-wing. Musk supported Barack Obama in 2008 and 2012, Hillary Clinton in 2016, Joe Biden in 2020, and Donald Trump in 2024. In the 2020 Democratic Party presidential primaries, Musk endorsed candidate Andrew Yang and expressed support for Yang's proposed universal basic income, and endorsed Kanye West's 2020 presidential campaign. In 2021, Musk publicly expressed opposition to the Build Back Better Act, a $3.5 trillion legislative package endorsed by Joe Biden that ultimately failed to pass due to unanimous opposition from congressional Republicans and several Democrats. In 2022, gave over $50 million to Citizens for Sanity, a conservative political action committee. In 2023, he supported Republican Ron DeSantis for the 2024 U.S. presidential election, giving $10 million to his campaign, and hosted DeSantis's campaign announcement on a Twitter Spaces event. From June 2023 to January 2024, Musk hosted a bipartisan set of X Spaces with Republican and Democratic candidates, including Robert F. Kennedy Jr., Vivek Ramaswamy, and Dean Phillips. In October 2025, former vice-president Kamala Harris commented that it was a mistake from the Democratic side to not invite Musk to a White House electric vehicle event organized in August 2021 and featuring executives from General Motors, Ford and Stellantis, despite Tesla being "the major American manufacturer of extraordinary innovation in this space." Fortune remarked that this was a nod to United Auto Workers and organized labor. Harris said presidents should put aside political loyalties when it came to recognizing innovation, and guessed that the non-invitation impacted Musk's perspective. Fortune noted that, at the time, Musk said, "Yeah, seems odd that Tesla wasn't invited." A month later, he criticized Biden as "not the friendliest administration." Jacob Silverman, author of the book Gilded Rage: Elon Musk and the Radicalization of Silicon Valley, said that the tech industry represented by Musk, Thiel, Andreessen and other capitalists, actually flourished under Biden, but the tech leaders chose Trump for their common ground on cultural issues. By early 2024, Musk had become a vocal and financial supporter of Donald Trump. In July 2024, minutes after the attempted assassination of Donald Trump, Musk endorsed him for president saying; "I fully endorse President Trump and hope for his rapid recovery." During the presidential campaign, Musk joined Trump on stage at a campaign rally, and during the campaign promoted conspiracy theories and falsehoods about Democrats, election fraud and immigration, in support of Trump. Musk was the largest individual donor of the 2024 election. In 2025, Musk contributed $19 million to the Wisconsin Supreme Court race, hoping to influence the state's future redistricting efforts and its regulations governing car manufacturers and dealers. In 2023, Musk said he shunned the World Economic Forum because it was boring. The organization commented that they had not invited him since 2015. He has participated in Dialog, dubbed "Tech Bilderberg" and organized by Peter Thiel and Auren Hoffman, though. Musk's international political actions and comments have come under increasing scrutiny and criticism, especially from the governments and leaders of France, Germany, Norway, Spain and the United Kingdom, particularly due to his position in the U.S. government as well as ownership of X. An NBC News analysis found he had boosted far-right political movements to cut immigration and curtail regulation of business in at least 18 countries on six continents since 2023. During his speech after the second inauguration of Donald Trump, Musk twice made a gesture interpreted by many as a Nazi or a fascist Roman salute.[e] He thumped his right hand over his heart, fingers spread wide, and then extended his right arm out, emphatically, at an upward angle, palm down and fingers together. He then repeated the gesture to the crowd behind him. As he finished the gestures, he said to the crowd, "My heart goes out to you. It is thanks to you that the future of civilization is assured." It was widely condemned as an intentional Nazi salute in Germany, where making such gestures is illegal. The Anti-Defamation League said it was not a Nazi salute, but other Jewish organizations disagreed and condemned the salute. American public opinion was divided on partisan lines as to whether it was a fascist salute. Musk dismissed the accusations of Nazi sympathies, deriding them as "dirty tricks" and a "tired" attack. Neo-Nazi and white supremacist groups celebrated it as a Nazi salute. Multiple European political parties demanded that Musk be banned from entering their countries. The concept of DOGE emerged in a discussion between Musk and Donald Trump, and in August 2024, Trump committed to giving Musk an advisory role, with Musk accepting the offer. In November and December 2024, Musk suggested that the organization could help to cut the U.S. federal budget, consolidate the number of federal agencies, and eliminate the Consumer Financial Protection Bureau, and that its final stage would be "deleting itself". In January 2025, the organization was created by executive order, and Musk was designated a "special government employee". Musk led the organization and was a senior advisor to the president, although his official role is not clear. In sworn statement during a lawsuit, the director of the White House Office of Administration stated that Musk "is not an employee of the U.S. DOGE Service or U.S. DOGE Service Temporary Organization", "is not the U.S. DOGE Service administrator", and has "no actual or formal authority to make government decisions himself". Trump said two days later that he had put Musk in charge of DOGE. A federal judge has ruled that Musk acted as the de facto leader of DOGE. Musk's role in the second Trump administration, particularly in response to DOGE, has attracted public backlash. He was criticized for his treatment of federal government employees, including his influence over the mass layoffs of the federal workforce. He has prioritized secrecy within the organization and has accused others of violating privacy laws. A Senate report alleged that Musk could avoid up to $2 billion in legal liability as a result of DOGE's actions. In May 2025, Bill Gates accused Musk of "killing the world's poorest children" through his cuts to USAID, which modeling by Boston University estimated had resulted in 300,000 deaths by this time, most of them of children. By November 2025, the estimated death toll had increased to 400,000 children and 200,000 adults. Musk announced on May 28, 2025, that he would depart from the Trump administration as planned when the special government employee's 130 day deadline expired, with a White House official confirming that Musk's offboarding from the Trump administration was already underway. His departure was officially confirmed during a joint Oval Office press conference with Trump on May 30, 2025. @realDonaldTrump is in the Epstein files. That is the real reason they have not been made public. June 5, 2025 After leaving office, Musk criticized the Trump administration's Big Beautiful Bill, calling it a "disgusting abomination" due to its provisions increasing the deficit. A feud began between Musk and Trump, with its most notable event being Musk alleging Trump had ties to sex offender Jeffrey Epstein on X (formerly Twitter) on June 5, 2025. Trump responded on Truth Social stating that Musk went "CRAZY" after the "EV Mandate" was purportedly taken away and threatened to cut Musk's government contracts. Musk then called for a third Trump impeachment. The next day, Trump stated that he did not wish to reconcile with Musk, and added that Musk would face "very serious consequences" if he funds Democratic candidates. On June 11, Musk publicly apologized for the tweets against Trump, saying they "went too far". Views November 6, 2022 Rejecting the conservative label, Musk has described himself as a political moderate, even as his views have become more right-wing over time. His views have been characterized as libertarian and far-right, and after his involvement in European politics, they have received criticism from world leaders such as Emmanuel Macron and Olaf Scholz. Within the context of American politics, Musk supported Democratic candidates up until 2022, at which point he voted for a Republican for the first time. He has stated support for universal basic income, gun rights, freedom of speech, a tax on carbon emissions, and H-1B visas. Musk has expressed concern about issues such as artificial intelligence (AI) and climate change, and has been a critic of wealth tax, short-selling, and government subsidies. An immigrant himself, Musk has been accused of being anti-immigration, and regularly blames immigration policies for illegal immigration. He is also a pronatalist who believes population decline is the biggest threat to civilization, and identifies as a cultural Christian. Musk has long been an advocate for space colonization, especially the colonization of Mars. He has repeatedly pushed for humanity colonizing Mars, in order to become an interplanetary species and lower the risks of human extinction. Musk has promoted conspiracy theories and made controversial statements that have led to accusations of racism, sexism, antisemitism, transphobia, disseminating disinformation, and support of white pride. While describing himself as a "pro-Semite", his comments regarding George Soros and Jewish communities have been condemned by the Anti-Defamation League and the Biden White House. Musk was criticized during the COVID-19 pandemic for making unfounded epidemiological claims, defying COVID-19 lockdowns restrictions, and supporting the Canada convoy protest against vaccine mandates. He has amplified false claims of white genocide in South Africa. Musk has been critical of Israel's actions in the Gaza Strip during the Gaza war, praised China's economic and climate goals, suggested that Taiwan and China should resolve cross-strait relations, and was described as having a close relationship with the Chinese government. In Europe, Musk expressed support for Ukraine in 2022 during the Russian invasion, recommended referendums and peace deals on the annexed Russia-occupied territories, and supported the far-right Alternative for Germany political party in 2024. Regarding British politics, Musk blamed the 2024 UK riots on mass migration and open borders, criticized Prime Minister Keir Starmer for what he described as a "two-tier" policing system, and was subsequently attacked as being responsible for spreading misinformation and amplifying the far-right. He has also voiced his support for far-right activist Tommy Robinson and pledged electoral support for Reform UK. In February 2026, Musk described Spanish Prime Minister Pedro Sánchez as a "tyrant" following Sánchez's proposal to prohibit minors under the age of 16 from accessing social media platforms. Legal affairs In 2018, Musk was sued by the U.S. Securities and Exchange Commission (SEC) for a tweet stating that funding had been secured for potentially taking Tesla private.[f] The securities fraud lawsuit characterized the tweet as false, misleading, and damaging to investors, and sought to bar Musk from serving as CEO of publicly traded companies. Two days later, Musk settled with the SEC, without admitting or denying the SEC's allegations. As a result, Musk and Tesla were fined $20 million each, and Musk was forced to step down for three years as Tesla chairman but was able to remain as CEO. Shareholders filed a lawsuit over the tweet, and in February 2023, a jury found Musk and Tesla not liable. Musk has stated in interviews that he does not regret posting the tweet that triggered the SEC investigation. In 2019, Musk stated in a tweet that Tesla would build half a million cars that year. The SEC reacted by asking a court to hold him in contempt for violating the terms of the 2018 settlement agreement. A joint agreement between Musk and the SEC eventually clarified the previous agreement details, including a list of topics about which Musk needed preclearance. In 2020, a judge blocked a lawsuit that claimed a tweet by Musk regarding Tesla stock price ("too high imo") violated the agreement. Freedom of Information Act (FOIA)-released records showed that the SEC concluded Musk had subsequently violated the agreement twice by tweeting regarding "Tesla's solar roof production volumes and its stock price". In October 2023, the SEC sued Musk over his refusal to testify a third time in an investigation into whether he violated federal law by purchasing Twitter stock in 2022. In February 2024, Judge Laurel Beeler ruled that Musk must testify again. In January 2025, the SEC filed a lawsuit against Musk for securities violations related to his purchase of Twitter. In January 2024, Delaware judge Kathaleen McCormick ruled in a 2018 lawsuit that Musk's $55 billion pay package from Tesla be rescinded. McCormick called the compensation granted by the company's board "an unfathomable sum" that was unfair to shareholders. The Delaware Supreme Court overturned McCormick's decision in December 2025, restoring Musk's compensation package and awarding $1 in nominal damages. Personal life Musk became a U.S. citizen in 2002. From the early 2000s until late 2020, Musk resided in California, where both Tesla and SpaceX were founded. He then relocated to Cameron County, Texas, saying that California had become "complacent" about its economic success. While hosting Saturday Night Live in 2021, Musk stated that he has Asperger syndrome (an outdated term for autism spectrum disorder). When asked about his experience growing up with Asperger's syndrome in a TED2022 conference in Vancouver, Musk stated that "the social cues were not intuitive ... I would just tend to take things very literally ... but then that turned out to be wrong — [people were not] simply saying exactly what they mean, there's all sorts of other things that are meant, and [it] took me a while to figure that out." Musk suffers from back pain and has undergone several spine-related surgeries, including a disc replacement. In 2000, he contracted a severe case of malaria while on vacation in South Africa. Musk has stated he uses doctor-prescribed ketamine for occasional depression and that he doses "a small amount once every other week or something like that"; since January 2024, some media outlets have reported that he takes ketamine, marijuana, LSD, ecstasy, mushrooms, cocaine and other drugs. Musk at first refused to comment on his alleged drug use, before responding that he had not tested positive for drugs, and that if drugs somehow improved his productivity, "I would definitely take them!". The New York Times' investigations revealed Musk's overuse of ketamine and numerous other drugs, as well as strained family relationships and concerns from close associates who have become troubled by his public behavior as he became more involved in political activities and government work. According to The Washington Post, President Trump described Musk as "a big-time drug addict". Through his own label Emo G Records, Musk released a rap track, "RIP Harambe", on SoundCloud in March 2019. The following year, he released an EDM track, "Don't Doubt Ur Vibe", featuring his own lyrics and vocals. Musk plays video games, which he stated has a "'restoring effect' that helps his 'mental calibration'". Some games he plays include Quake, Diablo IV, Elden Ring, and Polytopia. Musk once claimed to be one of the world's top video game players but has since admitted to "account boosting", or cheating by hiring outside services to achieve top player rankings. Musk has justified the boosting by claiming that all top accounts do it so he has to as well to remain competitive. In 2024 and 2025, Musk criticized the video game Assassin's Creed Shadows and its creator Ubisoft for "woke" content. Musk posted to X that "DEI kills art" and specified the inclusion of the historical figure Yasuke in the Assassin's Creed game as offensive; he also called the game "terrible". Ubisoft responded by saying that Musk's comments were "just feeding hatred" and that they were focused on producing a game not pushing politics. Musk has fathered at least 14 children, one of whom died as an infant. The Wall Street Journal reported in 2025 that sources close to Musk suggest that the "true number of Musk's children is much higher than publicly known". He had six children with his first wife, Canadian author Justine Wilson, whom he met while attending Queen's University in Ontario, Canada; they married in 2000. In 2002, their first child Nevada Musk died of sudden infant death syndrome at the age of 10 weeks. After his death, the couple used in vitro fertilization (IVF) to continue their family; they had twins in 2004, followed by triplets in 2006. The couple divorced in 2008 and have shared custody of their children. The elder twin he had with Wilson came out as a trans woman and, in 2022, officially changed her name to Vivian Jenna Wilson, adopting her mother's surname because she no longer wished to be associated with Musk. Musk began dating English actress Talulah Riley in 2008. They married two years later at Dornoch Cathedral in Scotland. In 2012, the couple divorced, then remarried the following year. After briefly filing for divorce in 2014, Musk finalized a second divorce from Riley in 2016. Musk then dated the American actress Amber Heard for several months in 2017; he had reportedly been "pursuing" her since 2012. In 2018, Musk and Canadian musician Grimes confirmed they were dating. Grimes and Musk have three children, born in 2020, 2021, and 2022.[g] Musk and Grimes originally gave their eldest child the name "X Æ A-12", which would have violated California regulations as it contained characters that are not in the modern English alphabet; the names registered on the birth certificate are "X" as a first name, "Æ A-Xii" as a middle name, and "Musk" as a last name. They received criticism for choosing a name perceived to be impractical and difficult to pronounce; Musk has said the intended pronunciation is "X Ash A Twelve". Their second child was born via surrogacy. Despite the pregnancy, Musk confirmed reports that the couple were "semi-separated" in September 2021; in an interview with Time in December 2021, he said he was single. In October 2023, Grimes sued Musk over parental rights and custody of X Æ A-Xii. Elon Musk has taken X Æ A-Xii to multiple official events in Washington, D.C. during Trump's second term in office. Also in July 2022, The Wall Street Journal reported that Musk allegedly had an affair with Nicole Shanahan, the wife of Google co-founder Sergey Brin, in 2021, leading to their divorce the following year. Musk denied the report. Musk also had a relationship with Australian actress Natasha Bassett, who has been described as "an occasional girlfriend". In October 2024, The New York Times reported Musk bought a Texas compound for his children and their mothers, though Musk denied having done so. Musk also has four children with Shivon Zilis, director of operations and special projects at Neuralink: twins born via IVF in 2021, a child born in 2024 via surrogacy and a child born in 2025.[h] On February 14, 2025, Ashley St. Clair, an influencer and author, posted on X claiming to have given birth to Musk's son Romulus five months earlier, which media outlets reported as Musk's supposed thirteenth child.[i] On February 22, 2025, it was reported that St Clair had filed for sole custody of her five-month-old son and for Musk to be recognised as the child's father. On March 31, 2025, Musk wrote that, while he was unsure if he was the father of St. Clair's child, he had paid St. Clair $2.5 million and would continue paying her $500,000 per year.[j] Later reporting from the Wall Street Journal indicated that $1 million of these payments to St. Clair were structured as a loan. In 2014, Musk and Ghislaine Maxwell appeared together in a photograph taken at an Academy Awards after-party, which Musk later described as a "photobomb". The January 2026 Epstein files contain emails between Musk and Epstein from 2012 to 2013, after Epstein's first conviction. Emails released on January 30, 2026, indicated that Epstein invited Musk to visit his private island on multiple occasions. The correspondence showed that while Epstein repeatedly encouraged Musk to attend, Musk did not visit the island. In one instance, Musk discussed the possibility of attending a party with his then-wife Talulah Riley and asked which day would be the "wildest party"; according to the emails, the visit did not take place after Epstein later cancelled the plans.[k] On Christmas day in 2012, Musk emailed Epstein asking "Do you have any parties planned? I’ve been working to the edge of sanity this year and so, once my kids head home after Christmas, I really want to hit the party scene in St Barts or elsewhere and let loose. The invitation is much appreciated, but a peaceful island experience is the opposite of what I’m looking for". Epstein replied that the "ratio on my island" might make Musk's wife uncomfortable to which Musk responded, "Ratio is not a problem for Talulah". On September 11, 2013, Epstein sent an email asking Musk if he had any plans for coming to New York for the opening of the United Nations General Assembly where many "interesting people" would be coming to his house to which Musk responded that "Flying to NY to see UN diplomats do nothing would be an unwise use of time". Epstein responded by stating "Do you think i am retarded. Just kidding, there is no one over 25 and all very cute." Musk has denied any close relationship with Epstein and described him as a "creep" who attempted to ingratiate himself with influential people. When Musk was asked in 2019 if he introduced Epstein to Mark Zuckerberg, Musk responded: "I don’t recall introducing Epstein to anyone, as I don’t know the guy well enough to do so." The released emails nonetheless showed cordial exchanges on a range of topics, including Musk's inquiry about parties on the island. The correspondence also indicated that Musk suggested hosting Epstein at SpaceX, while Epstein separately discussed plans to tour SpaceX and bring "the girls", though there is no evidence that such a visit occurred. Musk has described the release of the files a "distraction", later accusing the second Trump administration of suppressing them to protect powerful individuals, including Trump himself.[l] Wealth Elon Musk is the wealthiest person in the world, with an estimated net worth of US$690 billion as of January 2026, according to the Bloomberg Billionaires Index, and $852 billion according to Forbes, primarily from his ownership stakes in SpaceX and Tesla. Having been first listed on the Forbes Billionaires List in 2012, around 75% of Musk's wealth was derived from Tesla stock in November 2020, although he describes himself as "cash poor". According to Forbes, he became the first person in the world to achieve a net worth of $300 billion in 2021; $400 billion in December 2024; $500 billion in October 2025; $600 billion in mid-December 2025; $700 billion later that month; and $800 billion in February 2026. In November 2025, a Tesla pay package worth potentially $1 trillion for Musk was approved, which he is to receive over 10 years if he meets specific goals. Public image Although his ventures have been highly influential within their separate industries starting in the 2000s, Musk only became a public figure in the early 2010s. He has been described as an eccentric who makes spontaneous and impactful decisions, while also often making controversial statements, contrary to other billionaires who prefer reclusiveness to protect their businesses. Musk's actions and his expressed views have made him a polarizing figure. Biographer Ashlee Vance described people's opinions of Musk as polarized due to his "part philosopher, part troll" persona on Twitter. He has drawn denouncement for using his platform to mock the self-selection of personal pronouns, while also receiving praise for bringing international attention to matters like British survivors of grooming gangs. Musk has been described as an American oligarch due to his extensive influence over public discourse, social media, industry, politics, and government policy. After Trump's re-election, Musk's influence and actions during the transition period and the second presidency of Donald Trump led some to call him "President Musk", the "actual president-elect", "shadow president" or "co-president". Awards for his contributions to the development of the Falcon rockets include the American Institute of Aeronautics and Astronautics George Low Transportation Award in 2008, the Fédération Aéronautique Internationale Gold Space Medal in 2010, and the Royal Aeronautical Society Gold Medal in 2012. In 2015, he received an honorary doctorate in engineering and technology from Yale University and an Institute of Electrical and Electronics Engineers Honorary Membership. Musk was elected a Fellow of the Royal Society (FRS) in 2018.[m] In 2022, Musk was elected to the National Academy of Engineering. Time has listed Musk as one of the most influential people in the world in 2010, 2013, 2018, and 2021. Musk was selected as Time's "Person of the Year" for 2021. Then Time editor-in-chief Edward Felsenthal wrote that, "Person of the Year is a marker of influence, and few individuals have had more influence than Musk on life on Earth, and potentially life off Earth too." Notes References Works cited Further reading External links
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[SOURCE: https://en.wikipedia.org/wiki/Minecraft#cite_ref-xboxlive-2012_302-0] \| [TOKENS: 12858]
Contents Minecraft Minecraft is a sandbox game developed and published by Mojang Studios. Following its initial public alpha release in 2009, it was formally released in 2011 for personal computers. The game has since been ported to numerous platforms, including mobile devices and various video game consoles. In Minecraft, players explore a procedurally generated world with virtually infinite terrain made up of voxels (cubes). They can discover and extract raw materials, craft tools and items, build structures, fight hostile mobs, and cooperate with or compete against other players in multiplayer. The game's large community offers a wide variety of user-generated content, such as modifications, servers, player skins, texture packs, and custom maps, which add new game mechanics and possibilities. Originally created by Markus "Notch" Persson using the Java programming language, Jens "Jeb" Bergensten was handed control over the game's development following its full release. In 2014, Mojang and the Minecraft intellectual property were purchased by Microsoft for US$2.5 billion; Xbox Game Studios hold the publishing rights for the Bedrock Edition, the unified cross-platform version which evolved from the Pocket Edition codebase[i] and replaced the legacy console versions. Bedrock is updated concurrently with Mojang's original Java Edition, although with numerous, generally small, differences. Minecraft is the best-selling video game in history with over 350 million copies sold. It has received critical acclaim, winning several awards and being cited as one of the greatest video games of all time. Social media, parodies, adaptations, merchandise, and the annual Minecon conventions have played prominent roles in popularizing it. The wider Minecraft franchise includes several spin-off games, such as Minecraft: Story Mode, Minecraft Dungeons, and Minecraft Legends. A film adaptation, titled A Minecraft Movie, was released in 2025 and became the second highest-grossing video game film of all time. Gameplay Minecraft is a 3D sandbox video game that has no required goals to accomplish, giving players a large amount of freedom in choosing how to play the game. The game features an optional achievement system. Gameplay is in the first-person perspective by default, but players have the option of third-person perspectives. The game world is composed of rough 3D objects—mainly cubes, referred to as blocks—representing various materials, such as dirt, stone, ores, tree trunks, water, and lava. The core gameplay revolves around picking up and placing these objects. These blocks are arranged in a voxel grid, while players can move freely around the world. Players can break, or mine, blocks and then place them elsewhere, enabling them to build things. Very few blocks are affected by gravity, instead maintaining their voxel position in the air. Players can also craft a wide variety of items, such as armor, which mitigates damage from attacks; weapons (such as swords or bows and arrows), which allow monsters and animals to be killed more easily; and tools (such as pickaxes or shovels), which break certain types of blocks more quickly. Some items have multiple tiers depending on the material used to craft them, with higher-tier items being more effective and durable. They may also freely craft helpful blocks—such as furnaces which can cook food and smelt ores, and torches that produce light—or exchange items with villagers (NPC) through trading emeralds for different goods and vice versa. The game has an inventory system, allowing players to carry a limited number of items. The in-game time system follows a day and night cycle, with one full cycle lasting for 20 real-time minutes. The game also contains a material called redstone, which can be used to make primitive mechanical devices, electrical circuits, and logic gates, allowing for the construction of many complex systems. New players are given a randomly selected default character skin out of nine possibilities, including Steve or Alex, but are able to create and upload their own skins. Players encounter various mobs (short for mobile entities) including animals, villagers, and hostile creatures. Passive mobs, such as cows, pigs, and chickens, spawn during the daytime and can be hunted for food and crafting materials, while hostile mobs—including large spiders, witches, skeletons, and zombies—spawn during nighttime or in dark places such as caves. Some hostile mobs, such as zombies and skeletons, burn under the sun if they have no headgear and are not standing in water. Other creatures unique to Minecraft include the creeper (an exploding creature that sneaks up on the player) and the enderman (a creature with the ability to teleport as well as pick up and place blocks). There are also variants of mobs that spawn in different conditions; for example, zombies have husk and drowned variants that spawn in deserts and oceans, respectively. The Minecraft environment is procedurally generated as players explore it using a map seed that is randomly chosen at the time of world creation (or manually specified by the player). Divided into biomes representing different environments with unique resources and structures, worlds are designed to be effectively infinite in traditional gameplay, though technical limits on the player have existed throughout development, both intentionally and not. Implementation of horizontally infinite generation initially resulted in a glitch termed the "Far Lands" at over 12 million blocks away from the world center, where terrain generated as wall-like, fissured patterns. The Far Lands and associated glitches were considered the effective edge of the world until they were resolved, with the current horizontal limit instead being a special impassable barrier called the world border, located 30 million blocks away. Vertical space is comparatively limited, with an unbreakable bedrock layer at the bottom and a building limit several hundred blocks into the sky. Minecraft features three independent dimensions accessible through portals and providing alternate game environments. The Overworld is the starting dimension and represents the real world, with a terrestrial surface setting including plains, mountains, forests, oceans, caves, and small sources of lava. The Nether is a hell-like underworld dimension accessed via an obsidian portal and composed mainly of lava. Mobs that populate the Nether include shrieking, fireball-shooting ghasts, alongside anthropomorphic pigs called piglins and their zombified counterparts. Piglins in particular have a bartering system, where players can give them gold ingots and receive items in return. Structures known as Nether Fortresses generate in the Nether, containing mobs such as wither skeletons and blazes, which can drop blaze rods needed to access the End dimension. The player can also choose to build an optional boss mob known as the Wither, using skulls obtained from wither skeletons and soul sand. The End can be reached through an end portal, consisting of twelve end portal frames. End portals are found in underground structures in the Overworld known as strongholds. To find strongholds, players must craft eyes of ender using an ender pearl and blaze powder. Eyes of ender can then be thrown, traveling in the direction of the stronghold. Once the player reaches the stronghold, they can place eyes of ender into each portal frame to activate the end portal. The dimension consists of islands floating in a dark, bottomless void. A boss enemy called the Ender Dragon guards the largest, central island. Killing the dragon opens access to an exit portal, which, when entered, cues the game's ending credits and the End Poem, a roughly 1,500-word work written by Irish novelist Julian Gough, which takes about nine minutes to scroll past, is the game's only narrative text, and the only text of significant length directed at the player.: 10–12 At the conclusion of the credits, the player is teleported back to their respawn point and may continue the game indefinitely. In Survival mode, players have to gather natural resources such as wood and stone found in the environment in order to craft certain blocks and items. Depending on the difficulty, monsters spawn in darker areas outside a certain radius of the character, requiring players to build a shelter in order to survive at night. The mode also has a health bar which is depleted by attacks from mobs, falls, drowning, falling into lava, suffocation, starvation, and other events. Players also have a hunger bar, which must be periodically refilled by eating food in-game unless the player is playing on peaceful difficulty. If the hunger bar is empty, the player starves. Health replenishes when players have a full hunger bar or continuously on peaceful. Upon losing all health, players die. The items in the players' inventories are dropped unless the game is reconfigured not to do so. Players then re-spawn at their spawn point, which by default is where players first spawn in the game and can be changed by sleeping in a bed or using a respawn anchor. Dropped items can be recovered if players can reach them before they despawn after 5 minutes. Players may acquire experience points (commonly referred to as "xp" or "exp") by killing mobs and other players, mining, smelting ores, animal breeding, and cooking food. Experience can then be spent on enchanting tools, armor and weapons. Enchanted items are generally more powerful, last longer, or have other special effects. The game features two more game modes based on Survival, known as Hardcore mode and Adventure mode. Hardcore mode plays identically to Survival mode, but with the game's difficulty setting locked to "Hard" and with permadeath, forcing them to delete the world or explore it as a spectator after dying. Adventure mode was added to the game in a post-launch update, and prevents the player from directly modifying the game's world. It was designed primarily for use in custom maps, allowing map designers to let players experience it as intended. In Creative mode, players have access to an infinite number of all resources and items in the game through the inventory menu and can place or mine them instantly. Players can toggle the ability to fly freely around the game world at will, and their characters usually do not take any damage nor are affected by hunger. The game mode helps players focus on building and creating projects of any size without disturbance. Multiplayer in Minecraft enables multiple players to interact and communicate with each other on a single world. It is available through direct game-to-game multiplayer, local area network (LAN) play, local split screen (console-only), and servers (player-hosted and business-hosted). Players can run their own server by making a realm, using a host provider, hosting one themselves or connect directly to another player's game via Xbox Live, PlayStation Network or Nintendo Switch Online. Single-player worlds have LAN support, allowing players to join a world on locally interconnected computers without a server setup. Minecraft multiplayer servers are guided by server operators, who have access to server commands such as setting the time of day and teleporting players. Operators can also set up restrictions concerning which usernames or IP addresses are allowed or disallowed to enter the server. Multiplayer servers have a wide range of activities, with some servers having their own unique rules and customs. The largest and most popular server is Hypixel, which has been visited by over 14 million unique players. Player versus player combat (PvP) can be enabled to allow fighting between players. In 2013, Mojang announced Minecraft Realms, a server hosting service intended to enable players to run server multiplayer games easily and safely without having to set up their own. Unlike a standard server, only invited players can join Realms servers, and these servers do not use server addresses. Minecraft: Java Edition Realms server owners can invite up to twenty people to play on their server, with up to ten players online at a time. Minecraft Realms server owners can invite up to 3,000 people to play on their server, with up to ten players online at one time. The Minecraft: Java Edition Realms servers do not support user-made plugins, but players can play custom Minecraft maps. Minecraft Bedrock Realms servers support user-made add-ons, resource packs, behavior packs, and custom Minecraft maps. At Electronic Entertainment Expo 2016, support for cross-platform play between Windows 10, iOS, and Android platforms was added through Realms starting in June 2016, with Xbox One and Nintendo Switch support to come later in 2017, and support for virtual reality devices. On 31 July 2017, Mojang released the beta version of the update allowing cross-platform play. Nintendo Switch support for Realms was released in July 2018. The modding community consists of fans, users and third-party programmers. Using a variety of application program interfaces that have arisen over time, they have produced a wide variety of downloadable content for Minecraft, such as modifications, texture packs and custom maps. Modifications of the Minecraft code, called mods, add a variety of gameplay changes, ranging from new blocks, items, and mobs to entire arrays of mechanisms. The modding community is responsible for a substantial supply of mods from ones that enhance gameplay, such as mini-maps, waypoints, and durability counters, to ones that add to the game elements from other video games and media. While a variety of mod frameworks were independently developed by reverse engineering the code, Mojang has also enhanced vanilla Minecraft with official frameworks for modification, allowing the production of community-created resource packs, which alter certain game elements including textures and sounds. Players can also create their own "maps" (custom world save files) that often contain specific rules, challenges, puzzles and quests, and share them for others to play. Mojang added an adventure mode in August 2012 and "command blocks" in October 2012, which were created specially for custom maps in Java Edition. Data packs, introduced in version 1.13 of the Java Edition, allow further customization, including the ability to add new achievements, dimensions, functions, loot tables, predicates, recipes, structures, tags, and world generation. The Xbox 360 Edition supported downloadable content, which was available to purchase via the Xbox Games Store; these content packs usually contained additional character skins. It later received support for texture packs in its twelfth title update while introducing "mash-up packs", which combined texture packs with skin packs and changes to the game's sounds, music and user interface. The first mash-up pack (and by extension, the first texture pack) for the Xbox 360 Edition was released on 4 September 2013, and was themed after the Mass Effect franchise. Unlike Java Edition, however, the Xbox 360 Edition did not support player-made mods or custom maps. A cross-promotional resource pack based on the Super Mario franchise by Nintendo was released exclusively for the Wii U Edition worldwide on 17 May 2016, and later bundled free with the Nintendo Switch Edition at launch. Another based on Fallout was released on consoles that December, and for Windows and Mobile in April 2017. In April 2018, malware was discovered in several downloadable user-made Minecraft skins for use with the Java Edition of the game. Avast stated that nearly 50,000 accounts were infected, and when activated, the malware would attempt to reformat the user's hard drive. Mojang promptly patched the issue, and released a statement stating that "the code would not be run or read by the game itself", and would run only when the image containing the skin itself was opened. In June 2017, Mojang released the "1.1 Discovery Update" to the Pocket Edition of the game, which later became the Bedrock Edition. The update introduced the "Marketplace", a catalogue of purchasable user-generated content intended to give Minecraft creators "another way to make a living from the game". Various skins, maps, texture packs and add-ons from different creators can be bought with "Minecoins", a digital currency that is purchased with real money. Additionally, users can access specific content with a subscription service titled "Marketplace Pass". Alongside content from independent creators, the Marketplace also houses items published by Mojang and Microsoft themselves, as well as official collaborations between Minecraft and other intellectual properties. By 2022, the Marketplace had over 1.7 billion content downloads, generating over $500 million in revenue. Development Before creating Minecraft, Markus "Notch" Persson was a game developer at King, where he worked until March 2009. At King, he primarily developed browser games and learned several programming languages. During his free time, he prototyped his own games, often drawing inspiration from other titles, and was an active participant on the TIGSource forums for independent developers. One such project was "RubyDung", a base-building game inspired by Dwarf Fortress, but with an isometric, three-dimensional perspective similar to RollerCoaster Tycoon. Among the features in RubyDung that he explored was a first-person view similar to Dungeon Keeper, though he ultimately discarded this idea, feeling the graphics were too pixelated at the time. Around March 2009, Persson left King and joined jAlbum, while continuing to work on his prototypes. Infiniminer, a block-based open-ended mining game first released in April 2009, inspired Persson's vision for RubyDung's future direction. Infiniminer heavily influenced the visual style of gameplay, including bringing back the first-person mode, the "blocky" visual style and the block-building fundamentals. However, unlike Infiniminer, Persson wanted Minecraft to have RPG elements. The first public alpha build of Minecraft was released on 17 May 2009 on TIGSource. Over the years, Persson regularly released test builds that added new features, including tools, mobs, and entire new dimensions. In 2011, partly due to the game's rising popularity, Persson decided to release a full 1.0 version—a second part of the "Adventure Update"—on 18 November 2011. Shortly after, Persson stepped down from development, handing the project's lead to Jens "Jeb" Bergensten. On 15 September 2014, Microsoft, the developer behind the Microsoft Windows operating system and Xbox video game console, announced a $2.5 billion acquisition of Mojang, which included the Minecraft intellectual property. Persson had suggested the deal on Twitter, asking a corporation to buy his stake in the game after receiving criticism for enforcing terms in the game's end-user license agreement (EULA), which had been in place for the past three years. According to Persson, Mojang CEO Carl Manneh received a call from a Microsoft executive shortly after the tweet, asking if Persson was serious about a deal. Mojang was also approached by other companies including Activision Blizzard and Electronic Arts. The deal with Microsoft was arbitrated on 6 November 2014 and led to Persson becoming one of Forbes' "World's Billionaires". After 2014, Minecraft's primary versions received usually annual major updates—free to players who have purchased the game— each primarily centered around a specific theme. For instance, version 1.13, the Update Aquatic, focused on ocean-related features, while version 1.16, the Nether Update, introduced significant changes to the Nether dimension. However, in late 2024, Mojang announced a shift in their update strategy; rather than releasing large updates annually, they opted for a more frequent release schedule with smaller, incremental updates, stating, "We know that you want new Minecraft content more often." The Bedrock Edition has also received regular updates, now matching the themes of the Java Edition updates. Other versions of the game, such as various console editions and the Pocket Edition, were either merged into Bedrock or discontinued and have not received further updates. On 7 May 2019, coinciding with Minecraft's 10th anniversary, a JavaScript recreation of an old 2009 Java Edition build named Minecraft Classic was made available to play online for free. On 16 April 2020, a Bedrock Edition-exclusive beta version of Minecraft, called Minecraft RTX, was released by Nvidia. It introduced physically-based rendering, real-time path tracing, and DLSS for RTX-enabled GPUs. The public release was made available on 8 December 2020. Path tracing can only be enabled in supported worlds, which can be downloaded for free via the in-game Minecraft Marketplace, with a texture pack from Nvidia's website, or with compatible third-party texture packs. It cannot be enabled by default with any texture pack on any world. Initially, Minecraft RTX was affected by many bugs, display errors, and instability issues. On 22 March 2025, a new visual mode called Vibrant Visuals, an optional graphical overhaul similar to Minecraft RTX, was announced. It promises modern rendering features—such as dynamic shadows, screen space reflections, volumetric fog, and bloom—without the need of RTX-capable hardware. Vibrant Visuals was released as a part of the Chase the Skies update on 17 June 2025 for Bedrock Edition and is planned to release on Java Edition at a later date. Development began for the original edition of Minecraft—then known as Cave Game, and now known as the Java Edition—in May 2009,[k] and ended on 13 May, when Persson released a test video on YouTube of an early version of the game, dubbed the "Cave game tech test" or the "Cave game tech demo". The game was named Minecraft: Order of the Stone the next day, after a suggestion made by a player. "Order of the Stone" came from the webcomic The Order of the Stick, and "Minecraft" was chosen "because it's a good name". The title was later shortened to just Minecraft, omitting the subtitle. Persson completed the game's base programming over a weekend in May 2009, and private testing began on TigIRC on 16 May. The first public release followed on 17 May 2009 as a developmental version shared on the TIGSource forums. Based on feedback from forum users, Persson continued updating the game. This initial public build later became known as Classic. Further developmental phases—dubbed Survival Test, Indev, and Infdev—were released throughout 2009 and 2010. The first major update, known as Alpha, was released on 30 June 2010. At the time, Persson was still working a day job at jAlbum but later resigned to focus on Minecraft full-time as sales of the alpha version surged. Updates were distributed automatically, introducing new blocks, items, mobs, and changes to game mechanics such as water flow. With revenue generated from the game, Persson founded Mojang, a video game studio, alongside former colleagues Jakob Porser and Carl Manneh. On 11 December 2010, Persson announced that Minecraft would enter its beta phase on 20 December. He assured players that bug fixes and all pre-release updates would remain free. As development progressed, Mojang expanded, hiring additional employees to work on the project. The game officially exited beta and launched in full on 18 November 2011. On 1 December 2011, Jens "Jeb" Bergensten took full creative control over Minecraft, replacing Persson as lead designer. On 28 February 2012, Mojang announced the hiring of the developers behind Bukkit, a popular developer API for Minecraft servers, to improve Minecraft's support of server modifications. This move included Mojang taking apparent ownership of the CraftBukkit server mod, though this apparent acquisition later became controversial, and its legitimacy was questioned due to CraftBukkit's open-source nature and licensing under the GNU General Public License and Lesser General Public License. In August 2011, Minecraft: Pocket Edition was released as an early alpha for the Xperia Play via the Android Market, later expanding to other Android devices on 8 October 2011. The iOS version followed on 17 November 2011. A port was made available for Windows Phones shortly after Microsoft acquired Mojang. Unlike Java Edition, Pocket Edition initially focused on Minecraft's creative building and basic survival elements but lacked many features of the PC version. Bergensten confirmed on Twitter that the Pocket Edition was written in C++ rather than Java, as iOS does not support Java. On 10 December 2014, a port of Pocket Edition was released for Windows Phone 8.1. In July 2015, a port of the Pocket Edition to Windows 10 was released as the Windows 10 Edition, with full crossplay to other Pocket versions. In January 2017, Microsoft announced that it would no longer maintain the Windows Phone versions of Pocket Edition. On 20 September 2017, with the "Better Together Update", the Pocket Edition was ported to the Xbox One, and was renamed to the Bedrock Edition. The console versions of Minecraft debuted with the Xbox 360 edition, developed by 4J Studios and released on 9 May 2012. Announced as part of the Xbox Live Arcade NEXT promotion, this version introduced a redesigned crafting system, a new control interface, in-game tutorials, split-screen multiplayer, and online play via Xbox Live. Unlike the PC version, its worlds were finite, bordered by invisible walls. Initially, the Xbox 360 version resembled outdated PC versions but received updates to bring it closer to Java Edition before eventually being discontinued. The Xbox One version launched on 5 September 2014, featuring larger worlds and support for more players. Minecraft expanded to PlayStation platforms with PlayStation 3 and PlayStation 4 editions released on 17 December 2013 and 4 September 2014, respectively. Originally planned as a PS4 launch title, it was delayed before its eventual release. A PlayStation Vita version followed in October 2014. Like the Xbox versions, the PlayStation editions were developed by 4J Studios. Nintendo platforms received Minecraft: Wii U Edition on 17 December 2015, with a physical release in North America on 17 June 2016 and in Europe on 30 June. The Nintendo Switch version launched via the eShop on 11 May 2017. During a Nintendo Direct presentation on 13 September 2017, Nintendo announced that Minecraft: New Nintendo 3DS Edition, based on the Pocket Edition, would be available for download immediately after the livestream, and a physical copy available on a later date. The game is compatible only with the New Nintendo 3DS or New Nintendo 2DS XL systems and does not work with the original 3DS or 2DS systems. On 20 September 2017, the Better Together Update introduced Bedrock Edition across Xbox One, Windows 10, VR, and mobile platforms, enabling cross-play between these versions. Bedrock Edition later expanded to Nintendo Switch and PlayStation 4, with the latter receiving the update in December 2019, allowing cross-platform play for users with a free Xbox Live account. The Bedrock Edition released a native version for PlayStation 5 on 22 October 2024, while the Xbox Series X/S version launched on 17 June 2025. On 18 December 2018, the PlayStation 3, PlayStation Vita, Xbox 360, and Wii U versions of Minecraft received their final update and would later become known as "Legacy Console Editions". On 15 January 2019, the New Nintendo 3DS version of Minecraft received its final update, effectively becoming discontinued as well. An educational version of Minecraft, designed for use in schools, launched on 1 November 2016. It is available on Android, ChromeOS, iPadOS, iOS, MacOS, and Windows. On 20 August 2018, Mojang announced that it would bring Education Edition to iPadOS in Autumn 2018. It was released to the App Store on 6 September 2018. On 27 March 2019, it was announced that it would be operated by JD.com in China. On 26 June 2020, a public beta for the Education Edition was made available to Google Play Store compatible Chromebooks. The full game was released to the Google Play Store for Chromebooks on 7 August 2020. On 20 May 2016, China Edition (also known as My World) was announced as a localized edition for China, where it was released under a licensing agreement between NetEase and Mojang. The PC edition was released for public testing on 8 August 2017. The iOS version was released on 15 September 2017, and the Android version was released on 12 October 2017. The PC edition is based on the original Java Edition, while the iOS and Android mobile versions are based on the Bedrock Edition. The edition is free-to-play and had over 700 million registered accounts by September 2023. This version of Bedrock Edition is exclusive to Microsoft's Windows 10 and Windows 11 operating systems. The beta release for Windows 10 launched on the Windows Store on 29 July 2015. After nearly a year and a half in beta, Microsoft fully released the version on 19 December 2016. Called the "Ender Update", this release implemented new features to this version of Minecraft like world templates and add-on packs. On 7 June 2022, the Java and Bedrock Editions of Minecraft were merged into a single bundle for purchase on Windows; those who owned one version would automatically gain access to the other version. Both game versions would otherwise remain separate. Around 2011, prior to Minecraft's full release, Mojang collaborated with The Lego Group to create a Lego brick-based Minecraft game called Brickcraft. This would have modified the base Minecraft game to use Lego bricks, which meant adapting the basic 1×1 block to account for larger pieces typically used in Lego sets. Persson worked on an early version called "Project Rex Kwon Do", named after the character of the same name from the film Napoleon Dynamite. Although Lego approved the project and Mojang assigned two developers for six months, it was canceled due to the Lego Group's demands, according to Mojang's Daniel Kaplan. Lego considered buying Mojang to complete the game, but when Microsoft offered over $2 billion for the company, Lego stepped back, unsure of Minecraft's potential. On 26 June 2025, a build of Brickcraft dated 28 June 2012 was published on a community archive website Omniarchive. Initially, Markus Persson planned to support the Oculus Rift with a Minecraft port. However, after Facebook acquired Oculus in 2013, he abruptly canceled the plans, stating, "Facebook creeps me out." In 2016, a community-made mod, Minecraft VR, added VR support for Java Edition, followed by Vivecraft for HTC Vive. Later that year, Microsoft introduced official Oculus Rift support for Windows 10 Edition, leading to the discontinuation of the Minecraft VR mod due to trademark complaints. Vivecraft was endorsed by Minecraft VR contributors for its Rift support. Also available is a Gear VR version, titled Minecraft: Gear VR Edition. Windows Mixed Reality support was added in 2017. On 7 September 2020, Mojang Studios announced that the PlayStation 4 Bedrock version would receive PlayStation VR support later that month. In September 2024, the Minecraft team announced they would no longer support PlayStation VR, which received its final update in March 2025. Music and sound design Minecraft's music and sound effects were produced by German musician Daniel Rosenfeld, better known as C418. To create the sound effects for the game, Rosenfeld made extensive use of Foley techniques. On learning the processes for the game, he remarked, "Foley's an interesting thing, and I had to learn its subtleties. Early on, I wasn't that knowledgeable about it. It's a whole trial-and-error process. You just make a sound and eventually you go, 'Oh my God, that's it! Get the microphone!' There's no set way of doing anything at all." He reminisced on creating the in-game sound for grass blocks, stating "It turns out that to make grass sounds you don't actually walk on grass and record it, because grass sounds like nothing. What you want to do is get a VHS, break it apart, and just lightly touch the tape." According to Rosenfeld, his favorite sound to design for the game was the hisses of spiders. He elaborates, "I like the spiders. Recording that was a whole day of me researching what a spider sounds like. Turns out, there are spiders that make little screeching sounds, so I think I got this recording of a fire hose, put it in a sampler, and just pitched it around until it sounded like a weird spider was talking to you." Many of the sound design decisions by Rosenfeld were done accidentally or spontaneously. The creeper notably lacks any specific noises apart from a loud fuse-like sound when about to explode; Rosenfeld later recalled "That was just a complete accident by Markus and me [sic]. We just put in a placeholder sound of burning a matchstick. It seemed to work hilariously well, so we kept it." On other sounds, such as those of the zombie, Rosenfeld remarked, "I actually never wanted the zombies so scary. I intentionally made them sound comical. It's nice to hear that they work so well [...]." Rosenfeld remarked that the sound engine was "terrible" to work with, remembering "If you had two song files at once, it [the game engine] would actually crash. There were so many more weird glitches like that the guys never really fixed because they were too busy with the actual game and not the sound engine." The background music in Minecraft consists of instrumental ambient music. To compose the music of Minecraft, Rosenfeld used the package from Ableton Live, along with several additional plug-ins. Speaking on them, Rosenfeld said "They can be pretty much everything from an effect to an entire orchestra. Additionally, I've got some synthesizers that are attached to the computer. Like a Moog Voyager, Dave Smith Prophet 08 and a Virus TI." On 4 March 2011, Rosenfeld released a soundtrack titled Minecraft – Volume Alpha; it includes most of the tracks featured in Minecraft, as well as other music not featured in the game. Kirk Hamilton of Kotaku chose the music in Minecraft as one of the best video game soundtracks of 2011. On 9 November 2013, Rosenfeld released the second official soundtrack, titled Minecraft – Volume Beta, which included the music that was added in a 2013 "Music Update" for the game. A physical release of Volume Alpha, consisting of CDs, black vinyl, and limited-edition transparent green vinyl LPs, was issued by indie electronic label Ghostly International on 21 August 2015. On 14 August 2020, Ghostly released Volume Beta on CD and vinyl, with alternate color LPs and lenticular cover pressings released in limited quantities. The final update Rosenfeld worked on was 2018's 1.13 Update Aquatic. His music remained the only music in the game until 2020's "Nether Update", introducing pieces from Lena Raine. Since then, other composers have made contributions, including Kumi Tanioka, Samuel Åberg, Aaron Cherof, and Amos Roddy, with Raine remaining as the new primary composer. Ownership of all music besides Rosenfeld's independently released albums has been retained by Microsoft, with their label publishing all of the other artists' releases. Gareth Coker also composed some of the music for the game's mini games from the Legacy Console editions. Rosenfeld had stated his intent to create a third album of music for the game in a 2015 interview with Fact, and confirmed its existence in a 2017 tweet, stating that his work on the record as of then had tallied up to be longer than the previous two albums combined, which in total clocks in at over 3 hours and 18 minutes. However, due to licensing issues with Microsoft, the third volume has since not seen release. On 8 January 2021, Rosenfeld was asked in an interview with Anthony Fantano whether or not there was still a third volume of his music intended for release. Rosenfeld responded, saying, "I have something—I consider it finished—but things have become complicated, especially as Minecraft is now a big property, so I don't know." Reception Minecraft has received critical acclaim, with praise for the creative freedom it grants players in-game, as well as the ease of enabling emergent gameplay. Critics have expressed enjoyment in Minecraft's complex crafting system, commenting that it is an important aspect of the game's open-ended gameplay. Most publications were impressed by the game's "blocky" graphics, with IGN describing them as "instantly memorable". Reviewers also liked the game's adventure elements, noting that the game creates a good balance between exploring and building. The game's multiplayer feature has been generally received favorably, with IGN commenting that "adventuring is always better with friends". Jaz McDougall of PC Gamer said Minecraft is "intuitively interesting and contagiously fun, with an unparalleled scope for creativity and memorable experiences". It has been regarded as having introduced millions of children to the digital world, insofar as its basic game mechanics are logically analogous to computer commands. IGN was disappointed about the troublesome steps needed to set up multiplayer servers, calling it a "hassle". Critics also said that visual glitches occur periodically. Despite its release out of beta in 2011, GameSpot said the game had an "unfinished feel", adding that some game elements seem "incomplete or thrown together in haste". A review of the alpha version, by Scott Munro of the Daily Record, called it "already something special" and urged readers to buy it. Jim Rossignol of Rock Paper Shotgun also recommended the alpha of the game, calling it "a kind of generative 8-bit Lego Stalker". On 17 September 2010, gaming webcomic Penny Arcade began a series of comics and news posts about the addictiveness of the game. The Xbox 360 version was generally received positively by critics, but did not receive as much praise as the PC version. Although reviewers were disappointed by the lack of features such as mod support and content from the PC version, they acclaimed the port's addition of a tutorial and in-game tips and crafting recipes, saying that they make the game more user-friendly. The Xbox One Edition was one of the best received ports, being praised for its relatively large worlds. The PlayStation 3 Edition also received generally favorable reviews, being compared to the Xbox 360 Edition and praised for its well-adapted controls. The PlayStation 4 edition was the best received port to date, being praised for having 36 times larger worlds than the PlayStation 3 edition and described as nearly identical to the Xbox One edition. The PlayStation Vita Edition received generally positive reviews from critics but was noted for its technical limitations. The Wii U version received generally positive reviews from critics but was noted for a lack of GamePad integration. The 3DS version received mixed reviews, being criticized for its high price, technical issues, and lack of cross-platform play. The Nintendo Switch Edition received fairly positive reviews from critics, being praised, like other modern ports, for its relatively larger worlds. Minecraft: Pocket Edition initially received mixed reviews from critics. Although reviewers appreciated the game's intuitive controls, they were disappointed by the lack of content. The inability to collect resources and craft items, as well as the limited types of blocks and lack of hostile mobs, were especially criticized. After updates added more content, Pocket Edition started receiving more positive reviews. Reviewers complimented the controls and the graphics, but still noted a lack of content. Minecraft surpassed over a million purchases less than a month after entering its beta phase in early 2011. At the same time, the game had no publisher backing and has never been commercially advertised except through word of mouth, and various unpaid references in popular media such as the Penny Arcade webcomic. By April 2011, Persson estimated that Minecraft had made €23 million (US$33 million) in revenue, with 800,000 sales of the alpha version of the game, and over 1 million sales of the beta version. In November 2011, prior to the game's full release, Minecraft beta surpassed 16 million registered users and 4 million purchases. By March 2012, Minecraft had become the 6th best-selling PC game of all time. As of 10 October 2014[update], the game had sold 17 million copies on PC, becoming the best-selling PC game of all time. On 25 February 2014, the game reached 100 million registered users. By May 2019, 180 million copies had been sold across all platforms, making it the single best-selling video game of all time. The free-to-play Minecraft China version had over 700 million registered accounts by September 2023. By 2023, the game had sold over 300 million copies. As of April 2025, Minecraft has sold over 350 million copies. The Xbox 360 version of Minecraft became profitable within the first day of the game's release in 2012, when the game broke the Xbox Live sales records with 400,000 players online. Within a week of being on the Xbox Live Marketplace, Minecraft sold a million copies. GameSpot announced in December 2012 that Minecraft sold over 4.48 million copies since the game debuted on Xbox Live Arcade in May 2012. In 2012, Minecraft was the most purchased title on Xbox Live Arcade; it was also the fourth most played title on Xbox Live based on average unique users per day. As of 4 April 2014[update], the Xbox 360 version has sold 12 million copies. In addition, Minecraft: Pocket Edition has reached a figure of 21 million in sales. The PlayStation 3 Edition sold one million copies in five weeks. The release of the game's PlayStation Vita version boosted Minecraft sales by 79%, outselling both PS3 and PS4 debut releases and becoming the largest Minecraft launch on a PlayStation console. The PS Vita version sold 100,000 digital copies in Japan within the first two months of release, according to an announcement by SCE Japan Asia. By January 2015, 500,000 digital copies of Minecraft were sold in Japan across all PlayStation platforms, with a surge in primary school children purchasing the PS Vita version. As of 2022, the Vita version has sold over 1.65 million physical copies in Japan, making it the best-selling Vita game in the country. Minecraft helped improve Microsoft's total first-party revenue by $63 million for the 2015 second quarter. The game, including all of its versions, had over 112 million monthly active players by September 2019. On its 11th anniversary in May 2020, the company announced that Minecraft had reached over 200 million copies sold across platforms with over 126 million monthly active players. By April 2021, the number of active monthly users had climbed to 140 million. In July 2010, PC Gamer listed Minecraft as the fourth-best game to play at work. In December of that year, Good Game selected Minecraft as their choice for Best Downloadable Game of 2010, Gamasutra named it the eighth best game of the year as well as the eighth best indie game of the year, and Rock, Paper, Shotgun named it the "game of the year". Indie DB awarded the game the 2010 Indie of the Year award as chosen by voters, in addition to two out of five Editor's Choice awards for Most Innovative and Best Singleplayer Indie. It was also awarded Game of the Year by PC Gamer UK. The game was nominated for the Seumas McNally Grand Prize, Technical Excellence, and Excellence in Design awards at the March 2011 Independent Games Festival and won the Grand Prize and the community-voted Audience Award. At Game Developers Choice Awards 2011, Minecraft won awards in the categories for Best Debut Game, Best Downloadable Game and Innovation Award, winning every award for which it was nominated. It also won GameCity's video game arts award. On 5 May 2011, Minecraft was selected as one of the 80 games that would be displayed at the Smithsonian American Art Museum as part of The Art of Video Games exhibit that opened on 16 March 2012. At the 2011 Spike Video Game Awards, Minecraft won the award for Best Independent Game and was nominated in the Best PC Game category. In 2012, at the British Academy Video Games Awards, Minecraft was nominated in the GAME Award of 2011 category and Persson received The Special Award. In 2012, Minecraft XBLA was awarded a Golden Joystick Award in the Best Downloadable Game category, and a TIGA Games Industry Award in the Best Arcade Game category. In 2013, it was nominated as the family game of the year at the British Academy Video Games Awards. During the 16th Annual D.I.C.E. Awards, the Academy of Interactive Arts & Sciences nominated the Xbox 360 version of Minecraft for "Strategy/Simulation Game of the Year". Minecraft Console Edition won the award for TIGA Game Of The Year in 2014. In 2015, the game placed 6th on USgamer's The 15 Best Games Since 2000 list. In 2016, Minecraft placed 6th on Time's The 50 Best Video Games of All Time list. Minecraft was nominated for the 2013 Kids' Choice Awards for Favorite App, but lost to Temple Run. It was nominated for the 2014 Kids' Choice Awards for Favorite Video Game, but lost to Just Dance 2014. The game later won the award for the Most Addicting Game at the 2015 Kids' Choice Awards. In addition, the Java Edition was nominated for "Favorite Video Game" at the 2018 Kids' Choice Awards, while the game itself won the "Still Playing" award at the 2019 Golden Joystick Awards, as well as the "Favorite Video Game" award at the 2020 Kids' Choice Awards. Minecraft also won "Stream Game of the Year" at inaugural Streamer Awards in 2021. The game later garnered a Nickelodeon Kids' Choice Award nomination for Favorite Video Game in 2021, and won the same category in 2022 and 2023. At the Golden Joystick Awards 2025, it won the Still Playing Award - PC and Console. Minecraft has been subject to several notable controversies. In June 2014, Mojang announced that it would begin enforcing the portion of Minecraft's end-user license agreement (EULA) which prohibits servers from giving in-game advantages to players in exchange for donations or payments. Spokesperson Owen Hill stated that servers could still require players to pay a fee to access the server and could sell in-game cosmetic items. The change was supported by Persson, citing emails he received from parents of children who had spent hundreds of dollars on servers. The Minecraft community and server owners protested, arguing that the EULA's terms were more broad than Mojang was claiming, that the crackdown would force smaller servers to shut down for financial reasons, and that Mojang was suppressing competition for its own Minecraft Realms subscription service. The controversy contributed to Notch's decision to sell Mojang. In 2020, Mojang announced an eventual change to the Java Edition to require a login from a Microsoft account rather than a Mojang account, the latter of which would be sunsetted. This also required Java Edition players to create Xbox network Gamertags. Mojang defended the move to Microsoft accounts by saying that improved security could be offered, including two-factor authentication, blocking cyberbullies in chat, and improved parental controls. The community responded with intense backlash, citing various technical difficulties encountered in the process and how account migration would be mandatory, even for those who do not play on servers. As of 10 March 2022, Microsoft required that all players migrate in order to maintain access the Java Edition of Minecraft. Mojang announced a deadline of 19 September 2023 for account migration, after which all legacy Mojang accounts became inaccessible and unable to be migrated. In June 2022, Mojang added a player-reporting feature in Java Edition. Players could report other players on multiplayer servers for sending messages prohibited by the Xbox Live Code of Conduct; report categories included profane language,[l] substance abuse, hate speech, threats of violence, and nudity. If a player was found to be in violation of Xbox Community Standards, they would be banned from all servers for a specific period of time or permanently. The update containing the report feature (1.19.1) was released on 27 July 2022. Mojang received substantial backlash and protest from community members, one of the most common complaints being that banned players would be forbidden from joining any server, even private ones. Others took issue to what they saw as Microsoft increasing control over its player base and exercising censorship, leading some to start a hashtag #saveminecraft and dub the version "1.19.84", a reference to the dystopian novel Nineteen Eighty-Four. The "Mob Vote" was an online event organized by Mojang in which the Minecraft community voted between three original mob concepts; initially, the winning mob was to be implemented in a future update, while the losing mobs were scrapped, though after the first mob vote this was changed, and losing mobs would now have a chance to come to the game in the future. The first Mob Vote was held during Minecon Earth 2017 and became an annual event starting with Minecraft Live 2020. The Mob Vote was often criticized for forcing players to choose one mob instead of implementing all three, causing divisions and flaming within the community, and potentially allowing internet bots and Minecraft content creators with large fanbases to conduct vote brigading. The Mob Vote was also blamed for a perceived lack of new content added to Minecraft since Microsoft's acquisition of Mojang in 2014. The 2023 Mob Vote featured three passive mobs—the crab, the penguin, and the armadillo—with voting scheduled to start on 13 October. In response, a Change.org petition was created on 6 October, demanding that Mojang eliminate the Mob Vote and instead implement all three mobs going forward. The petition received approximately 445,000 signatures by 13 October and was joined by calls to boycott the Mob Vote, as well as a partially tongue-in-cheek "revolutionary" propaganda campaign in which sympathizers created anti-Mojang and pro-boycott posters in the vein of real 20th century propaganda posters. Mojang did not release an official response to the boycott, and the Mob Vote otherwise proceeded normally, with the armadillo winning the vote. In September 2024, as part of a blog post detailing their future plans for Minecraft's development, Mojang announced the Mob Vote would be retired. Cultural impact In September 2019, The Guardian classified Minecraft as the best video game of the 21st century to date, and in November 2019, Polygon called it the "most important game of the decade" in its 2010s "decade in review". In June 2020, Minecraft was inducted into the World Video Game Hall of Fame. Minecraft is recognized as one of the first successful games to use an early access model to draw in sales prior to its full release version to help fund development. As Minecraft helped to bolster indie game development in the early 2010s, it also helped to popularize the use of the early access model in indie game development. Social media sites such as YouTube, Facebook, and Reddit have played a significant role in popularizing Minecraft. Research conducted by the Annenberg School for Communication at the University of Pennsylvania showed that one-third of Minecraft players learned about the game via Internet videos. In 2010, Minecraft-related videos began to gain influence on YouTube, often made by commentators. The videos usually contain screen-capture footage of the game and voice-overs. Common coverage in the videos includes creations made by players, walkthroughs of various tasks, and parodies of works in popular culture. By May 2012, over four million Minecraft-related YouTube videos had been uploaded. The game would go on to be a prominent fixture within YouTube's gaming scene during the entire 2010s; in 2014, it was the second-most searched term on the entire platform. By 2018, it was still YouTube's biggest game globally. Some popular commentators have received employment at Machinima, a now-defunct gaming video company that owned a highly watched entertainment channel on YouTube. The Yogscast is a British company that regularly produces Minecraft videos; their YouTube channel has attained billions of views, and their panel at Minecon 2011 had the highest attendance. Another well-known YouTube personality is Jordan Maron, known online as CaptainSparklez, who has also created many Minecraft music parodies, including "Revenge", a parody of Usher's "DJ Got Us Fallin' in Love". Minecraft's popularity on YouTube was described by Polygon as quietly dominant, although in 2019, thanks in part to PewDiePie's playthroughs of the game, Minecraft experienced a visible uptick in popularity on the platform. Longer-running series include Far Lands or Bust, dedicated to reaching the obsolete "Far Lands" glitch by foot on an older version of the game. YouTube announced that on 14 December 2021 that the total amount of Minecraft-related views on the website had exceeded one trillion. Minecraft has been referenced by other video games, such as Torchlight II, Team Fortress 2, Borderlands 2, Choplifter HD, Super Meat Boy, The Elder Scrolls V: Skyrim, The Binding of Isaac, The Stanley Parable, and FTL: Faster Than Light. Minecraft is officially represented in downloadable content for the crossover fighter Super Smash Bros. Ultimate, with Steve as a playable character with a moveset including references to building, crafting, and redstone, alongside an Overworld-themed stage. It was also referenced by electronic music artist Deadmau5 in his performances. The game is also referenced heavily in "Informative Murder Porn", the second episode of the seventeenth season of the animated television series South Park. In 2025, A Minecraft Movie was released. It made $313 million in the box office in the first week, a record-breaking opening for a video game adaptation. Minecraft has been noted as a cultural touchstone for Generation Z, as many of the generation's members played the game at a young age. The possible applications of Minecraft have been discussed extensively, especially in the fields of computer-aided design (CAD) and education. In a panel at Minecon 2011, a Swedish developer discussed the possibility of using the game to redesign public buildings and parks, stating that rendering using Minecraft was much more user-friendly for the community, making it easier to envision the functionality of new buildings and parks. In 2012, a member of the Human Dynamics group at the MIT Media Lab, Cody Sumter, said: "Notch hasn't just built a game. He's tricked 40 million people into learning to use a CAD program." Various software has been developed to allow virtual designs to be printed using professional 3D printers or personal printers such as MakerBot and RepRap. In September 2012, Mojang began the Block by Block project in cooperation with UN Habitat to create real-world environments in Minecraft. The project allows young people who live in those environments to participate in designing the changes they would like to see. Using Minecraft, the community has helped reconstruct the areas of concern, and citizens are invited to enter the Minecraft servers and modify their own neighborhood. Carl Manneh, Mojang's managing director, called the game "the perfect tool to facilitate this process", adding "The three-year partnership will support UN-Habitat's Sustainable Urban Development Network to upgrade 300 public spaces by 2016." Mojang signed Minecraft building community, FyreUK, to help render the environments into Minecraft. The first pilot project began in Kibera, one of Nairobi's informal settlements and is in the planning phase. The Block by Block project is based on an earlier initiative started in October 2011, Mina Kvarter (My Block), which gave young people in Swedish communities a tool to visualize how they wanted to change their part of town. According to Manneh, the project was a helpful way to visualize urban planning ideas without necessarily having a training in architecture. The ideas presented by the citizens were a template for political decisions. In April 2014, the Danish Geodata Agency generated all of Denmark in fullscale in Minecraft based on their own geodata. This is possible because Denmark is one of the flattest countries with the highest point at 171 meters (ranking as the country with the 30th smallest elevation span), where the limit in default Minecraft was around 192 meters above in-game sea level when the project was completed. Taking advantage of the game's accessibility where other websites are censored, the non-governmental organization Reporters Without Borders has used an open Minecraft server to create the Uncensored Library, a repository within the game of journalism by authors from countries (including Egypt, Mexico, Russia, Saudi Arabia and Vietnam) who have been censored and arrested, such as Jamal Khashoggi. The neoclassical virtual building was created over about 250 hours by an international team of 24 people. Despite its unpredictable nature, Minecraft speedrunning, where players time themselves from spawning into a new world to reaching The End and defeating the Ender Dragon boss, is popular. Some speedrunners use a combination of mods, external programs, and debug menus, while other runners play the game in a more vanilla or more consistency-oriented way. Minecraft has been used in educational settings through initiatives such as MinecraftEdu, founded in 2011 to make the game affordable and accessible for schools in collaboration with Mojang. MinecraftEdu provided features allowing teachers to monitor student progress, including screenshot submissions as evidence of lesson completion, and by 2012 reported that approximately 250,000 students worldwide had access to the platform. Mojang also developed Minecraft: Education Edition with pre-built lesson plans for up to 30 students in a closed environment. Educators have used Minecraft to teach subjects such as history, language arts, and science through custom-built environments, including reconstructions of historical landmarks and large-scale models of biological structures such as animal cells. The introduction of redstone blocks enabled the construction of functional virtual machines such as a hard drive and an 8-bit computer. Mods have been created to use these mechanics for teaching programming. In 2014, the British Museum announced a project to reproduce its building and exhibits in Minecraft in collaboration with the public. Microsoft and Code.org have offered Minecraft-based tutorials and activities designed to teach programming, reporting by 2018 that more than 85 million children had used their resources. In 2025, the Musée de Minéralogie in Paris held a temporary exhibition titled "Minerals in Minecraft." Following the initial surge in popularity of Minecraft in 2010, other video games were criticised for having various similarities to Minecraft, and some were described as being "clones", often due to a direct inspiration from Minecraft, or a superficial similarity. Examples include Ace of Spades, CastleMiner, CraftWorld, FortressCraft, Terraria, BlockWorld 3D, Total Miner, and Luanti (formerly Minetest). David Frampton, designer of The Blockheads, reported that one failure of his 2D game was the "low resolution pixel art" that too closely resembled the art in Minecraft, which resulted in "some resistance" from fans. A homebrew adaptation of the alpha version of Minecraft for the Nintendo DS, titled DScraft, has been released; it has been noted for its similarity to the original game considering the technical limitations of the system. In response to Microsoft's acquisition of Mojang and their Minecraft IP, various developers announced further clone titles developed specifically for Nintendo's consoles, as they were the only major platforms not to officially receive Minecraft at the time. These clone titles include UCraft (Nexis Games), Cube Life: Island Survival (Cypronia), Discovery (Noowanda), Battleminer (Wobbly Tooth Games), Cube Creator 3D (Big John Games), and Stone Shire (Finger Gun Games). Despite this, the fears of fans were unfounded, with official Minecraft releases on Nintendo consoles eventually resuming. Markus Persson made another similar game, Minicraft, for a Ludum Dare competition in 2011. In 2025, Persson announced through a poll on his X account that he was considering developing a spiritual successor to Minecraft. He later clarified that he was "100% serious", and that he had "basically announced Minecraft 2". Within days, however, Persson cancelled the plans after speaking to his team. In November 2024, artificial intelligence companies Decart and Etched released Oasis, an artificially generated version of Minecraft, as a proof of concept. Every in-game element is completely AI-generated in real time and the model does not store world data, leading to "hallucinations" such as items and blocks appearing that were not there before. In January 2026, indie game developer Unomelon announced that their voxel sandbox game Allumeria would be playable in Steam Next Fest that year. On 10 February, Mojang issued a DMCA takedown of Allumeria on Steam through Valve, alleging the game was infringing on Minecraft's copyright. Some reports suggested that the takedown may have used an automatic AI copyright claiming service. The DMCA was later withdrawn. Minecon was an annual official fan convention dedicated to Minecraft. The first full Minecon was held in November 2011 at the Mandalay Bay Hotel and Casino in Las Vegas. The event included the official launch of Minecraft; keynote speeches, including one by Persson; building and costume contests; Minecraft-themed breakout classes; exhibits by leading gaming and Minecraft-related companies; commemorative merchandise; and autograph and picture times with Mojang employees and well-known contributors from the Minecraft community. In 2016, Minecon was held in-person for the last time, with the following years featuring annual "Minecon Earth" livestreams on minecraft.net and YouTube instead. These livestreams, later rebranded to "Minecraft Live", included the mob/biome votes, and announcements of new game updates. In 2025, "Minecraft Live" became a biannual event as part of Minecraft's changing update schedule.[citation needed] Notes References External links
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[SOURCE: https://en.wikipedia.org/wiki/Nonlinear_gameplay] \| [TOKENS: 2619]
Contents Nonlinear gameplay A video game with nonlinear gameplay presents players with challenges that can be completed in a number of different sequences. Each may take on (or even encounter) only some of the challenges possible, and the same challenges may be played in a different order. Conversely, a video game with linear gameplay will confront a player with a fixed sequence of challenges: every player faces every challenge and has to overcome them in the same order. A nonlinear game will allow greater player freedom than a linear game. For example, a nonlinear game may permit multiple sequences to finish the game, a choice between paths to victory, different types of victory, or optional side-quests and subplots. Some games feature both linear and nonlinear elements, and some games offer a sandbox mode that allows players to explore an open world game environment independently from the game's main objectives, if any objectives are provided at all. A game that is significantly nonlinear is sometimes described as being open-ended or a sandbox, and is characterized by allowing players to measure progress through self-determined goals, independent of scripted game elements. Level design A game level or world can be linear, nonlinear or both. In a linear game, there is only one path the player can take through a level, but in games with nonlinear gameplay, players might have to revisit locations or choose from multiple paths to finish the level. As with other game elements, linear level design is not absolute. While a nonlinear level can give the freedom to explore or backtrack, there can be a sequence of challenges that a player must solve to complete the level. If a player must confront the challenges in a fixed order nonlinear games will often give multiple approaches to achieve said objectives. A more linear game requires a player to finish levels in a fixed sequence to win. The ability to skip, repeat, or choose between levels makes this type of game less linear. Super Mario Bros. is an early example of this, where the player had access to warp zones that skipped many levels of the game. In some games, levels can change between linear design and free roaming depending on the objective of the stage. Super Mario 64 is an example where the main stages are free roam, while the levels where Bowser is encountered follow a straight path to the end. When a game is sufficiently large and open-ended, it may be described as an open world or as a sandbox game. Open-world game designs have existed in some form since the 1980s, such as the space trading game Elite, and often make use of procedurally generated environments. In a game with a sandbox mode, a player may turn off or ignore game objectives, or have unlimited access to items. This can open up possibilities that were not intended by the game designer. A sandbox mode is an option in otherwise goal-oriented games and is distinguished from open-ended games that have no objectives, such as SimCity, and Garry's Mod. Branching storylines Games that employ linear stories are those where the player cannot change the story line or ending of the story. Many video games use a linear structure, thus making them more similar to other fiction, but it is common for such games to use interactive narration in which a player needs to interact with something before the plot will advance, or nonlinear narratives in which events are portrayed in a non-chronological order. Many games have offered premature endings should the player fail to meet an objective, but these are usually just interruptions in a player's progress rather than actual endings. Even in games with a linear story, players interact with the game world by performing a variety of actions along the way. More recently, some games have begun offering multiple endings to increase the dramatic effect of moral choices within the game, although early examples also exist. Still, some games have gone beyond small choices or special endings, offering a branching storyline (also known as an interactive narrative outside of a video game context), that players may control at critical points in the game. Sometimes the player is given a choice of which branch of the plot to follow, while sometimes the path will be based on the player's success or failure at a specific challenge. For example, Black Isle Studios' Fallout series of role-playing video games features numerous quests where player actions dictate the outcome of the story behind the objectives. Players can eliminate in-game characters permanently from the virtual world should they choose to do so, and by doing so may actually alter the number and type of quests that become available to them as the game progresses. The effects of such decisions may not be immediate. Branches of the story may merge or split at different points in the game, but seldom allow backtracking. Some games even allow for different starting points, and one way this is done is through a character selection screen. Linear stories cost less time and money to develop, since there is only one fixed sequence of events and no major decisions to keep track of. For example, several games from the Wing Commander series offered a branching storyline, but eventually they were abandoned as too expensive. Nonlinear stories increase the chances for bugs or absurdities if they are not tested properly, although they do provide greater player freedom. Some players have also responded negatively to branching stories because it is hard and tedious for them to experience the "full value" of all the game's content. As a compromise between linear and branching stories, there are also games where stories split into branches and then fold back into a single storyline. In these stories, the plot will branch, but then converge upon some inevitable event, giving the impression of a nonlinear gameplay through the use of nonlinear narrative, without the use of interactive narratives. This is typically used in many graphic adventure games. A truly nonlinear story would be written entirely by the actions of the player, and thus remains a difficult design challenge. As such, there is often little or no story in video games with a truly nonlinear gameplay. Facade, a video game often categorized as an interactive drama, features many branching paths that are dictated by the user's text input based on the current situation, but there is still a set number of outcomes as a result of the inherent limitations of programming, and as such, is nonlinear, but not entirely so. Branching storylines are a common trend in visual novels, a subgenre of interactive narrative and adventure games. Visual novels frequently use multiple branching storylines to achieve multiple different endings, allowing nonlinear freedom of choice along the way. Decision points within a visual novel often present players with the option of altering the course of events during the game, leading to many different possible outcomes.[unreliable source] Visual novels are popular in East Asia, especially in Japan where they account for nearly 70% of personal computer games released there. An acclaimed example is 999: Nine Hours, Nine Persons, Nine Doors, where nearly every action and dialogue choice can lead to entirely new branching paths and endings. Each path only reveals certain aspects of the overall storyline and it is only after uncovering all the possible different paths and outcomes through multiple playthroughs that everything comes together to form a coherent well-written story. It is not uncommon for visual novels to have morality systems. A well-known example is the 2005 title School Days, an animated visual novel that Kotaku describes as going well beyond the usual "black and white choice systems" (referring to video games such as Mass Effect, Fallout 3 and BioShock) where the players "pick a side and stick with it" while leaving "the expansive middle area between unexplored". School Days instead encourages players to explore the grey, neutral middle-ground in order to view more interesting, "bad" endings. It is also not uncommon for visual novels to have multiple protagonists giving different perspectives on the story. C's Ware's EVE Burst Error (1995) introduced a unique twist to the system by allowing the player to switch between both protagonists at any time during the game, instead of finishing one protagonist's scenario before playing the other. EVE Burst Error often requires the player to have both protagonists co-operate with each other at various points during the game, with choices in one scenario affecting the other. Fate/stay night is another example that features multiple perspectives. Chunsoft sound novels such as Machi (1998) and 428: Shibuya Scramble (2008) develop this concept further, by allowing the player to alternate between the perspectives of several or more different characters, making choices with one character that have consequences for other characters. 428 in particular features up to 85 different possible endings. Another approach to nonlinear storytelling can be seen in Cosmology of Kyoto. The game lacks an overall plot, but it instead presents fragmented narratives and situations in a nonlinear manner, as the player character encounters various non-player characters while wandering the city. These narratives are cross-referenced to an encyclopedia, providing background information as the narratives progress and as the player comes across various characters and locations, with various stories, situations and related information appearing at distinct locations. It provides enough freedom to allow for the player to experiment with the game, such as using it as a resource for their own role-playing game campaign, for example. Branching storylines are also often used in role-playing video games (RPGs) to an extent. An early example, published in 1999, is the fantasy role-playing game Might and Magic VII: For Blood and Honor, where players have to choose between Light and Dark. While the dark side wants to destroy the world of Enroth, the light side tries to save it. The choice determines which grandmaster levels the player characters can obtain and the quests they have to do in that part of the game. Earlier in the game, the player already has to choose sides in a border conflict between Elves and Humans, or remain neutral. This affects the flag in their Castle Harmondale and a few quests, but not the outcome. A second example is Obsidian Entertainment's Fallout: New Vegas, where the player's decisions influence whether one of three different factions gain control of the area surrounding post-apocalyptic Las Vegas. These factions include Caesar's Legion, a group of Roman-esque slavers; the New California Republic (NCR), an expansionist military government; and Mr. House, the enigmatic de facto ruler of New Vegas, in command of an army of robots that patrols the city. Each of the three sides aim to control Hoover Dam, which is still operational and supplying the American Southwest with power and clean, non-irradiated water; thus, control of the dam means effective control of the region. A fourth option, siding with a robot named Yes Man and prevailing upon or eliminating the other faction leaders, enables the player to go solo and take over the Hoover Dam for themselves. Another RPG example is tri-Ace's Star Ocean series, where the storyline is not affected by moral alignments like in other role-playing games, but inspired by dating sims, by friendship and relationship points between each of the characters. Star Ocean: The Second Story in particular offers as many as 86 different endings with hundreds of permutations, setting a benchmark for the number of possible outcomes of a video game. Another unique variation of this system is the Sakura Wars series, which features a real-time branching choice system where, during an event or conversation, the player must choose an action or dialogue choice within a time limit, or not to respond at all within that time; the player's choice, or lack thereof, affects the player character's relationship with other characters and in turn the direction and outcome of the storyline. Later games in the series added several variations, including an action gauge that can be raised up or down depending on the situation, and a gauge that the player can manipulate using the analog stick depending on the situation. A similar type of conversation system later appeared in a more recent action role-playing game also published by Sega, Alpha Protocol. Another unique take on the concept is combining nonlinear branching storytelling with the concepts of time travel and parallel universes. Early attempts at such an approach included Squaresoft's Chrono role-playing game series (1995–1999) and ELF's visual novel YU-NO: A girl who chants love at the bound of this world (1996). Radiant Historia takes it further by giving players the freedom to travel backwards and forwards through a timeline to alter the course of history, with each of their choices and actions significantly affect the timeline. The player can return to certain points in history and live through certain events again to make different choices and see different possible outcomes on the timeline. The player can also travel back and forth between two parallel timelines, and can obtain many possible parallel endings. The PSP version of Tactics Ogre featured a "World" system that allows players to revisit key plot points and make different choices to see how the story unfolds differently. Final Fantasy XIII-2 also features a similar nonlinear time travel system to Radiant Historia. Early examples Early examples (pre-1983) of nonlinear gameplay include: See also References
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[SOURCE: https://en.wikipedia.org/wiki/History_of_the_Jews_in_Kuwait] \| [TOKENS: 250]
Contents History of the Jews in Kuwait The history of the Jews in Kuwait is closely connected to the history of the Jews in Iraq. History The noted British businessman Naim Dangoor was an Iraqi Jewish exile whose grandfather was the chief rabbi in Baghdad. He came to Britain in the 1930s to study engineering at Queen Mary College in London and returned to Iraq to join the army and then set up his business empire. He spent the 1950s running the Coca-Cola franchise in Iraq with a beloved Muslim business partner. He states that: Professor Faisal Abdulla Alkanderi of Kuwait corroborates the above in his essay in Islam and Christian-Muslim Relations, 2006, as summarized: Today, the Avraham Society claims to represent all Kuwaiti Jews, stating on their website that they are a "modern Humanistic and Cultural initiative that is based on and representing the Jewish Community of Kuwait in all its denominations." Notable individuals There have also been some Kuwaitis converting to Judaism, such as Yousef Al-Mhanna (Hebrew name: Naftali Benya), Ibtisam Hamid (Hebrew name: Basma Al-Kuwaiti) and Mark Halawa. See also References
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[SOURCE: https://en.wikipedia.org/wiki/Orion_(constellation)#cite_note-49] \| [TOKENS: 4993]
Contents Orion (constellation) Orion is a prominent set of stars visible during winter in the northern celestial hemisphere. It is one of the 88 modern constellations; it was among the 48 constellations listed by the 2nd-century AD/CE astronomer Ptolemy. It is named after a hunter in Greek mythology. Orion is most prominent during winter evenings in the Northern Hemisphere, as are five other constellations that have stars in the Winter Hexagon asterism. Orion's two brightest stars, Rigel (β) and Betelgeuse (α), are both among the brightest stars in the night sky; both are supergiants and slightly variable. There are a further six stars brighter than magnitude 3.0, including three making the short straight line of the Orion's Belt asterism. Orion also hosts the radiant of the annual Orionids, the strongest meteor shower associated with Halley's Comet, and the Orion Nebula, one of the brightest nebulae in the sky. Characteristics Orion is bordered by Taurus to the northwest, Eridanus to the southwest, Lepus to the south, Monoceros to the east, and Gemini to the northeast. Covering 594 square degrees, Orion ranks 26th of the 88 constellations in size. The constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of 26 sides. In the equatorial coordinate system, the right ascension coordinates of these borders lie between 04h 43.3m and 06h 25.5m , while the declination coordinates are between 22.87° and −10.97°. The constellation's three-letter abbreviation, as adopted by the International Astronomical Union in 1922, is "Ori". Orion is most visible in the evening sky from January to April, winter in the Northern Hemisphere, and summer in the Southern Hemisphere. In the tropics (less than about 8° from the equator), the constellation transits at the zenith. From May to July (summer in the Northern Hemisphere, winter in the Southern Hemisphere), Orion is in the daytime sky and thus invisible at most latitudes. However, for much of Antarctica in the Southern Hemisphere's winter months, the Sun is below the horizon even at midday. Stars (and thus Orion, but only the brightest stars) are then visible at twilight for a few hours around local noon, just in the brightest section of the sky low in the North where the Sun is just below the horizon. At the same time of day at the South Pole itself (Amundsen–Scott South Pole Station), Rigel is only 8° above the horizon, and the Belt sweeps just along it. In the Southern Hemisphere's summer months, when Orion is normally visible in the night sky, the constellation is actually not visible in Antarctica because the Sun does not set at that time of year south of the Antarctic Circle. In countries close to the equator (e.g. Kenya, Indonesia, Colombia, Ecuador), Orion appears overhead in December around midnight and in the February evening sky. Navigational aid Orion is very useful as an aid to locating other stars. By extending the line of the Belt southeastward, Sirius (α CMa) can be found; northwestward, Aldebaran (α Tau). A line eastward across the two shoulders indicates the direction of Procyon (α CMi). A line from Rigel through Betelgeuse points to Castor and Pollux (α Gem and β Gem). Additionally, Rigel is part of the Winter Circle asterism. Sirius and Procyon, which may be located from Orion by following imaginary lines (see map), also are points in both the Winter Triangle and the Circle. Features Orion's seven brightest stars form a distinctive hourglass-shaped asterism, or pattern, in the night sky. Four stars—Rigel, Betelgeuse, Bellatrix, and Saiph—form a large roughly rectangular shape, at the center of which lie the three stars of Orion's Belt—Alnitak, Alnilam, and Mintaka. His head is marked by an additional eighth star called Meissa, which is fairly bright to the observer. Descending from the Belt is a smaller line of three stars, Orion's Sword (the middle of which is in fact not a star but the Orion Nebula), also known as the hunter's sword. Many of the stars are luminous hot blue supergiants, with the stars of the Belt and Sword forming the Orion OB1 association. Standing out by its red hue, Betelgeuse may nevertheless be a runaway member of the same group. Orion's Belt, or The Belt of Orion, is an asterism within the constellation. It consists of three bright stars: Alnitak (Zeta Orionis), Alnilam (Epsilon Orionis), and Mintaka (Delta Orionis). Alnitak is around 800 light-years away from Earth, 100,000 times more luminous than the Sun, and shines with a magnitude of 1.8; much of its radiation is in the ultraviolet range, which the human eye cannot see. Alnilam is approximately 2,000 light-years from Earth, shines with a magnitude of 1.70, and with an ultraviolet light that is 375,000 times more luminous than the Sun. Mintaka is 915 light-years away and shines with a magnitude of 2.21. It is 90,000 times more luminous than the Sun and is a double star: the two orbit each other every 5.73 days. In the Northern Hemisphere, Orion's Belt is best visible in the night sky during the month of January at around 9:00 pm, when it is approximately around the local meridian. Just southwest of Alnitak lies Sigma Orionis, a multiple star system composed of five stars that have a combined apparent magnitude of 3.7 and lying at a distance of 1150 light-years. Southwest of Mintaka lies the quadruple star Eta Orionis. Orion's Sword contains the Orion Nebula, the Messier 43 nebula, Sh 2-279 (also known as the Running Man Nebula), and the stars Theta Orionis, Iota Orionis, and 42 Orionis. Three stars comprise a small triangle that marks the head. The apex is marked by Meissa (Lambda Orionis), a hot blue giant of spectral type O8 III and apparent magnitude 3.54, which lies some 1100 light-years distant. Phi-1 and Phi-2 Orionis make up the base. Also nearby is the young star FU Orionis. Stretching north from Betelgeuse are the stars that make up Orion's club. Mu Orionis marks the elbow, Nu and Xi mark the handle of the club, and Chi1 and Chi2 mark the end of the club. Just east of Chi1 is the Mira-type variable red giant star U Orionis. West from Bellatrix lie six stars all designated Pi Orionis (π1 Ori, π2 Ori, π3 Ori, π4 Ori, π5 Ori, and π6 Ori) which make up Orion's shield. Around 20 October each year, the Orionid meteor shower (Orionids) reaches its peak. Coming from the border with the constellation Gemini, as many as 20 meteors per hour can be seen. The shower's parent body is Halley's Comet. Hanging from Orion's Belt is his sword, consisting of the multiple stars θ1 and θ2 Orionis, called the Trapezium and the Orion Nebula (M42). This is a spectacular object that can be clearly identified with the naked eye as something other than a star. Using binoculars, its clouds of nascent stars, luminous gas, and dust can be observed. The Trapezium cluster has many newborn stars, including several brown dwarfs, all of which are at an approximate distance of 1,500 light-years. Named for the four bright stars that form a trapezoid, it is largely illuminated by the brightest stars, which are only a few hundred thousand years old. Observations by the Chandra X-ray Observatory show both the extreme temperatures of the main stars—up to 60,000 kelvins—and the star forming regions still extant in the surrounding nebula. M78 (NGC 2068) is a nebula in Orion. With an overall magnitude of 8.0, it is significantly dimmer than the Great Orion Nebula that lies to its south; however, it is at approximately the same distance, at 1600 light-years from Earth. It can easily be mistaken for a comet in the eyepiece of a telescope. M78 is associated with the variable star V351 Orionis, whose magnitude changes are visible in very short periods of time. Another fairly bright nebula in Orion is NGC 1999, also close to the Great Orion Nebula. It has an integrated magnitude of 10.5 and is 1500 light-years from Earth. The variable star V380 Orionis is embedded in NGC 1999. Another famous nebula is IC 434, the Horsehead Nebula, near Alnitak (Zeta Orionis). It contains a dark dust cloud whose shape gives the nebula its name. NGC 2174 is an emission nebula located 6400 light-years from Earth. Besides these nebulae, surveying Orion with a small telescope will reveal a wealth of interesting deep-sky objects, including M43, M78, and multiple stars including Iota Orionis and Sigma Orionis. A larger telescope may reveal objects such as the Flame Nebula (NGC 2024), as well as fainter and tighter multiple stars and nebulae. Barnard's Loop can be seen on very dark nights or using long-exposure photography. All of these nebulae are part of the larger Orion molecular cloud complex, which is located approximately 1,500 light-years away and is hundreds of light-years across. Due to its proximity, it is one of the most intense regions of stellar formation visible from Earth. The Orion molecular cloud complex forms the eastern part of an even larger structure, the Orion–Eridanus Superbubble, which is visible in X-rays and in hydrogen emissions. History and mythology The distinctive pattern of Orion is recognized in numerous cultures around the world, and many myths are associated with it. Orion is used as a symbol in the modern world. In Siberia, the Chukchi people see Orion as a hunter; an arrow he has shot is represented by Aldebaran (Alpha Tauri), with the same figure as other Western depictions. In Greek mythology, Orion was a gigantic, supernaturally strong hunter, born to Euryale, a Gorgon, and Poseidon (Neptune), god of the sea. One myth recounts Gaia's rage at Orion, who dared to say that he would kill every animal on Earth. The angry goddess tried to dispatch Orion with a scorpion. This is given as the reason that the constellations of Scorpius and Orion are never in the sky at the same time. However, Ophiuchus, the Serpent Bearer, revived Orion with an antidote. This is said to be the reason that the constellation of Ophiuchus stands midway between the Scorpion and the Hunter in the sky. The constellation is mentioned in Horace's Odes (Ode 3.27.18), Homer's Odyssey (Book 5, line 283) and Iliad, and Virgil's Aeneid (Book 1, line 535). In old Hungarian tradition, Orion is known as "Archer" (Íjász), or "Reaper" (Kaszás). In recently rediscovered myths, he is called Nimrod (Hungarian: Nimród), the greatest hunter, father of the twins Hunor and Magor. The π and o stars (on upper right) form together the reflex bow or the lifted scythe. In other Hungarian traditions, Orion's Belt is known as "Judge's stick" (Bírópálca). In Ireland and Scotland, Orion was called An Bodach, a figure from Irish folklore whose name literally means "the one with a penis [bod]" and was the husband of the Cailleach (hag). In Scandinavian tradition, Orion's Belt was known as "Frigg's Distaff" (friggerock) or "Freyja's distaff". The Finns call Orion's Belt and the stars below it "Väinämöinen's scythe" (Väinämöisen viikate). Another name for the asterism of Alnilam, Alnitak, and Mintaka is "Väinämöinen's Belt" (Väinämöisen vyö) and the stars "hanging" from the Belt as "Kaleva's sword" (Kalevanmiekka). There are claims in popular media that the Adorant from the Geißenklösterle cave, an ivory carving estimated to be 35,000 to 40,000 years old, is the first known depiction of the constellation. Scholars dismiss such interpretations, saying that perceived details such as a belt and sword derive from preexisting features in the grain structure of the ivory. The Babylonian star catalogues of the Late Bronze Age name Orion MULSIPA.ZI.AN.NA,[note 1] "The Heavenly Shepherd" or "True Shepherd of Anu" – Anu being the chief god of the heavenly realms. The Babylonian constellation is sacred to Papshukal and Ninshubur, both minor gods fulfilling the role of "messenger to the gods". Papshukal is closely associated with the figure of a walking bird on Babylonian boundary stones, and on the star map the figure of the Rooster is located below and behind the figure of the True Shepherd—both constellations represent the herald of the gods, in his bird and human forms respectively. In ancient Egypt, the stars of Orion were regarded as a god, called Sah. Because Orion rises before Sirius, the star whose heliacal rising was the basis for the Solar Egyptian calendar, Sah was closely linked with Sopdet, the goddess who personified Sirius. The god Sopdu is said to be the son of Sah and Sopdet. Sah is syncretized with Osiris, while Sopdet is syncretized with Osiris' mythological wife, Isis. In the Pyramid Texts, from the 24th and 23rd centuries BC, Sah is one of many gods whose form the dead pharaoh is said to take in the afterlife. The Armenians identified their legendary patriarch and founder Hayk with Orion. Hayk is also the name of the Orion constellation in the Armenian translation of the Bible. The Bible mentions Orion three times, naming it "Kesil" (כסיל, literally – fool). Though, this name perhaps is etymologically connected with "Kislev", the name for the ninth month of the Hebrew calendar (i.e. November–December), which, in turn, may derive from the Hebrew root K-S-L as in the words "kesel, kisla" (כֵּסֶל, כִּסְלָה, hope, positiveness), i.e. hope for winter rains.: Job 9:9 ("He is the maker of the Bear and Orion"), Job 38:31 ("Can you loosen Orion's belt?"), and Amos 5:8 ("He who made the Pleiades and Orion"). In ancient Aram, the constellation was known as Nephîlā′, the Nephilim are said to be Orion's descendants. In medieval Muslim astronomy, Orion was known as al-jabbar, "the giant". Orion's sixth brightest star, Saiph, is named from the Arabic, saif al-jabbar, meaning "sword of the giant". In China, Orion was one of the 28 lunar mansions Sieu (Xiù) (宿). It is known as Shen (參), literally meaning "three", for the stars of Orion's Belt. The Chinese character 參 (pinyin shēn) originally meant the constellation Orion (Chinese: 參宿; pinyin: shēnxiù); its Shang dynasty version, over three millennia old, contains at the top a representation of the three stars of Orion's Belt atop a man's head (the bottom portion representing the sound of the word was added later). The Rigveda refers to the constellation as Mriga (the Deer). Nataraja, "the cosmic dancer", is often interpreted as the representation of Orion. Rudra, the Rigvedic form of Shiva, is the presiding deity of Ardra nakshatra (Betelgeuse) of Hindu astrology. The Jain Symbol carved in the Udayagiri and Khandagiri Caves, India in 1st century BCE has a striking resemblance with Orion. Bugis sailors identified the three stars in Orion's Belt as tanra tellué, meaning "sign of three". The Seri people of northwestern Mexico call the three stars in Orion's Belt Hapj (a name denoting a hunter) which consists of three stars: Hap (mule deer), Haamoja (pronghorn), and Mojet (bighorn sheep). Hap is in the middle and has been shot by the hunter; its blood has dripped onto Tiburón Island. The same three stars are known in Spain and most of Latin America as "Las tres Marías" (Spanish for "The Three Marys"). In Puerto Rico, the three stars are known as the "Los Tres Reyes Magos" (Spanish for The Three Wise Men). The Ojibwa/Chippewa Native Americans call this constellation Mesabi for Big Man. To the Lakota Native Americans, Tayamnicankhu (Orion's Belt) is the spine of a bison. The great rectangle of Orion is the bison's ribs; the Pleiades star cluster in nearby Taurus is the bison's head; and Sirius in Canis Major, known as Tayamnisinte, is its tail. Another Lakota myth mentions that the bottom half of Orion, the Constellation of the Hand, represented the arm of a chief that was ripped off by the Thunder People as a punishment from the gods for his selfishness. His daughter offered to marry the person who can retrieve his arm from the sky, so the young warrior Fallen Star (whose father was a star and whose mother was human) returned his arm and married his daughter, symbolizing harmony between the gods and humanity with the help of the younger generation. The index finger is represented by Rigel; the Orion Nebula is the thumb; the Belt of Orion is the wrist; and the star Beta Eridani is the pinky finger. The seven primary stars of Orion make up the Polynesian constellation Heiheionakeiki which represents a child's string figure similar to a cat's cradle. Several precolonial Filipinos referred to the belt region in particular as "balatik" (ballista) as it resembles a trap of the same name which fires arrows by itself and is usually used for catching pigs from the bush. Spanish colonization later led to some ethnic groups referring to Orion's Belt as "Tres Marias" or "Tatlong Maria." In Māori tradition, the star Rigel (known as Puanga or Puaka) is closely connected with the celebration of Matariki. The rising of Matariki (the Pleiades) and Rigel before sunrise in midwinter marks the start of the Māori year. In Javanese culture, the constellation is often called Lintang Waluku or Bintang Bajak, referring to the shape of a paddy field plow. The imagery of the Belt and Sword has found its way into popular Western culture, for example in the form of the shoulder insignia of the 27th Infantry Division of the United States Army during both World Wars, probably owing to a pun on the name of the division's first commander, Major General John F. O'Ryan. The film distribution company Orion Pictures used the constellation as its logo. In artistic renderings, the surrounding constellations are sometimes related to Orion: he is depicted standing next to the river Eridanus with his two hunting dogs Canis Major and Canis Minor, fighting Taurus. He is sometimes depicted hunting Lepus the hare. He sometimes is depicted to have a lion's hide in his hand. There are alternative ways to visualise Orion. From the Southern Hemisphere, Orion is oriented south-upward, and the Belt and Sword are sometimes called the saucepan or pot in Australia and New Zealand. Orion's Belt is called Drie Konings (Three Kings) or the Drie Susters (Three Sisters) by Afrikaans speakers in South Africa and are referred to as les Trois Rois (the Three Kings) in Daudet's Lettres de Mon Moulin (1866). The appellation Driekoningen (the Three Kings) is also often found in 17th and 18th-century Dutch star charts and seaman's guides. The same three stars are known in Spain, Latin America, and the Philippines as "Las Tres Marías" (The Three Marys), and as "Los Tres Reyes Magos" (The Three Wise Men) in Puerto Rico. Even traditional depictions of Orion have varied greatly. Cicero drew Orion in a similar fashion to the modern depiction. The Hunter held an unidentified animal skin aloft in his right hand; his hand was represented by Omicron2 Orionis and the skin was represented by the five stars designated Pi Orionis. Saiph and Rigel represented his left and right knees, while Eta Orionis and Lambda Leporis were his left and right feet, respectively. As in the modern depiction, Mintaka, Alnilam, and Alnitak represented his Belt. His left shoulder was represented by Betelgeuse, and Mu Orionis made up his left arm. Meissa was his head, and Bellatrix his right shoulder. The depiction of Hyginus was similar to that of Cicero, though the two differed in a few important areas. Cicero's animal skin became Hyginus's shield (Omicron and Pi Orionis), and instead of an arm marked out by Mu Orionis, he holds a club (Chi Orionis). His right leg is represented by Theta Orionis and his left leg is represented by Lambda, Mu, and Epsilon Leporis. Further Western European and Arabic depictions have followed these two models. Future Orion is located on the celestial equator, but it will not always be so located due to the effects of precession of the Earth's axis. Orion lies well south of the ecliptic, and it only happens to lie on the celestial equator because the point on the ecliptic that corresponds to the June solstice is close to the border of Gemini and Taurus, to the north of Orion. Precession will eventually carry Orion further south, and by AD 14000, Orion will be far enough south that it will no longer be visible from the latitude of Great Britain. Further in the future, Orion's stars will gradually move away from the constellation due to proper motion. However, Orion's brightest stars all lie at a large distance from Earth on an astronomical scale—much farther away than Sirius, for example. Orion will still be recognizable long after most of the other constellations—composed of relatively nearby stars—have distorted into new configurations, with the exception of a few of its stars eventually exploding as supernovae, for example Betelgeuse, which is predicted to explode sometime in the next million years. See also References External links
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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/East_Coast_of_the_United_States] \| [TOKENS: 2213]
Contents East Coast of the United States The East Coast of the United States, also known as the Eastern Seaboard, the Atlantic Coast, and the Atlantic Seaboard, is the region encompassing the coastline where the Eastern United States meets the Atlantic Ocean; it has always played a major socioeconomic role in the development of the United States. The region is generally understood to include the U.S. states that border the Atlantic Ocean: Connecticut, Delaware, Florida, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Rhode Island, South Carolina, and Virginia, as well as some landlocked states (Pennsylvania, Vermont, West Virginia, and the district of Washington, D.C.). Toponymy and composition The toponym derives from the concept that the contiguous 48 states are defined by two major coastlines, one at the western edge and one on the eastern edge. Other terms for referring to this area include the Eastern seaboard, which is another term for coastline, Atlantic Coast, and Atlantic Seaboard because the coastline lies along the Atlantic Ocean. The 14 states that have a shoreline on the Atlantic Ocean are (from north to south): Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia, and Florida. Pennsylvania and Washington, D.C. border the Delaware River and the Potomac River, respectively, both of which are tidal arms of the Atlantic Ocean. Colonial history The original Thirteen Colonies of Great Britain in North America all lay on or near the East Coast.[b] Two additional U.S. states on the East Coast were not among the original Thirteen Colonies: Maine became part of Massachusetts Bay Colony in 1677 and Florida was held by the British from the end of the French and Indian War until 1781 and was part of New Spain until 1821. In present-day Florida, Spanish explorer Juan Ponce de León made the first textual records of the state during his 1513 voyage. The state was initially named for Ponce de León, who called the peninsula La Pascua Florida in recognition of the verdant landscape and because it was the Easter season. Delaware Colony and the provinces of New Jersey, New York, and Pennsylvania had been colonized by the Dutch as New Netherland until they were ceded to the British in the mid- to late-17th century. From 1777 to 1791, Vermont was an independent nation as the Vermont Republic. Geography and climate In simplest terms, three (3) basic climate regions occur on the East Coast; 1) A cold continental climate, from the US-Canadian border south to southern Rhode Island and western Maryland, 2) a temperate climate, from coastal Rhode Island south to western North Carolina, and 3) a subtropical climate from extreme southeast Virginia south to central Florida. The humid continental climate region (Dfa/Dfb/Dc) includes Maine, New Hampshire, Vermont, most of Massachusetts, most of Rhode Island, most of Connecticut, most of New York State, most of North Jersey, most of Pennsylvania, and western Maryland. This region features warm to occasionally hot summers and cold winters with frequent snow (especially in Maine, Vermont, and New Hampshire). All locations have a least one month with a mean temperature below 0 °C (32 °F) and four to seven months averaging above 10 °C (50 °F). The area from southern Rhode Island southward (coastal Connecticut, Long Island, New York City, most of New Jersey, most of Delaware, most of Maryland, most of Virginia, and western NC) has a warm temperate climate (Cfa/Do) with long, hot, humid summers and cool to cold winters with occasional snow. The mean temparature in the coldest month is 0 °C (32 °F) or higher. Normally, at least one month has a mean temperature over 22 °C (71.6 °F) and six to seven months average above 10 °C (50 °F).. The area from the southern Delmarva Peninsula, southeast Virginia, and central North Carolina south to central Florida is humid subtropical (Cfa/Cf), with hot summers that have almost daily (but brief) thundershowers and mild and drier winters. In this zone, at least eight months have a mean temperature above 10 °C (50 °F). The region of Florida from the south-central region of the state south to the Florida Keys has a tropical climate (Af/Aw/Ar) that is usually frost-free and warm to hot all year, and all of the 12 months of the year average above 18 °C (64.4 °F). This region of Florida is the only tropical climate in the continental United States.[citation needed] The least common climate on the East Coast is the oceanic (Cfb/Do), which is only found on Block Island, Nantucket, and the Outer Cape and Chatham on Cape Cod, and in areas of the southern Appalachian Mountains. This zone has all monthly averages between 0 and 22 °C and six to seven months above 50 °F. Although winter precipitation is more likely to fall as rain than as snow, occasional heavy snow is possible.[citation needed] Although landfalls are rare, the Eastern Seaboard is susceptible to hurricanes in the Atlantic hurricane season, officially running from June 1 to November 30, although hurricanes can occur before or after these dates. Hurricanes Hazel, Hugo, Bob, Isabel, Irene, and Sandy, and most recently Florence, Isaias, Henri, and Ida are some of the more significant storms to have affected the region.[citation needed] The East Coast, with the exception of Eastern Maine, is a low relief, passive margin coast. It has been shaped by the Pleistocene glaciation in the far northern areas in New England, with offshore islands such as Nantucket, Martha's Vineyard, Block Island, and Fishers Island. From northern New Jersey southward, the coastal plain broadens southwards, separated from the Piedmont region by the Atlantic Seaboard fall line of the East Coast rivers, often marking the head of navigation and prominent sites of cities.[citation needed] The coastal areas from Long Island south to Florida are often made up of barrier islands that front the coastal areas, with the long stretches of sandy beaches. Many of the larger capes along the lower East Coast are in fact barrier islands, like the Outer Banks of North Carolina and Cape Canaveral, Florida. The Florida Keys are made up of limestone coral and provide the only coral reefs on the U.S. mainland.[citation needed] Demographics In 2010, the population of the states that have shoreline on the East Coast was estimated at 112,642,503 (about 36% of the country's total population). New York City is both the largest city and the largest metropolitan area on the East Coast. The East Coast is the most populated coastal area in the United States. Transportation The primary Interstate Highway along the East Coast is Interstate 95, completed in 2018, which replaced the historic U.S. Route 1 (Atlantic Highway), the original federal highway that traversed all East Coast states except Delaware. By water, the East Coast is connected from the Annisquam River in Gloucester, Massachusetts to Miami, Florida, by the Intracoastal Waterway, also known as the East Coast Canal, which was completed in 1912. Amtrak's Downeaster and Northeast Regional offer the main passenger rail service on the Seaboard. The Acela Express offers the only high-speed rail passenger service in the Americas. Between New York and Boston, the Acela Express has up to a 54% share of the combined train and air passenger market. Some of the largest airports in the United States are located along the East Coast of the United States, such as John F. Kennedy International Airport in Queens, New York City, Logan International Airport in Boston, Newark Liberty Airport in Newark, New Jersey, Philadelphia International Airport in Philadelphia, Baltimore–Washington International Airport near Baltimore, Dulles International Airport near Washington, D.C., Hartsfield–Jackson International Airport in Atlanta, Miami International Airport in Miami, Charlotte Douglas International Airport in Charlotte, North Carolina, Tampa International Airport in Tampa, and Orlando International Airport in Orlando, Florida. Culture As the first spot in the United States that immigrants arrived and the close proximity of Europe, the Caribbean, and Latin America, the East Coast is home to a diverse population and home to multi-cultures when compared to the rest of the U.S. From the strong Latin culture in southern Florida, to the 200-year-old Gullah culture of the low country coastal islands of Georgia and South Carolina, to the many historic cities in the Mid-Atlantic, where a strong English, German, Italian, Irish, and French culture are present, the East Coast is significantly more diverse than the rest of the United States. Numerous Chinatowns in New York City, and Little Havana in Miami, are examples of such cultural centers in the bigger cities. The East Coast is home to much of the political and financial power and a center for resort and travel destinations in the United States. New York City is the most populous city in the country and a major world financial center. Seventy-one of the world's Fortune 500 companies have their corporate headquarters in New York City, while Midtown Manhattan, with 400 million square feet of office space in 2018, is the largest central business district in the world. Washington, D.C. is the federal capital and political nerve center of the United States. Many organizations such as defense contractors, civilian contractors, nonprofit organizations, lobbying firms, trade unions, industry trade groups and professional associations have their headquarters in or near Washington, D.C., in order to be close to the federal government. Miami is one of the top domestic and international travel destinations in the United States. It is the warmest major city in the continental United States in winter, which contributes to it being a major tourism hub for international visitors. Miami has one of the largest concentrations of international banks in the United States, and the third-largest skyline in the U.S. with over 439 high-rises, 68 of which exceed 490 ft (150 m). The Port of Miami is the busiest cruise port in the world in both passenger traffic and cruise lines, with over 5.5 million cruise passengers passing through the port each year. The center for tropical plant culture and research in the United States is based in Miami at Fairchild Tropical Botanic Garden. The state of Florida is the second-largest producer of oranges in the world behind Brazil. See also Notes References
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[SOURCE: https://en.wikipedia.org/wiki/Lawrence_Summers] \| [TOKENS: 6858]
Contents Larry Summers Lawrence Henry Summers (born November 30, 1954) is an American economist. He served as the 71st United States secretary of the treasury from 1999 to 2001, as the 27th president of Harvard University from 2001 to 2006, and as the eighth director of the National Economic Council from 2009 to 2010. Currently at Harvard Kennedy School, he is the Charles W. Eliot University Professor. He is on leave from his teaching responsibilities and from his role as the director of the Mossavar-Rahmani Center for Business and Government as of November 19, 2025, due to an investigation into his ties to Jeffrey Epstein. Summers became a professor of economics at Harvard University in 1983. He left Harvard in 1991, working as the chief economist of the World Bank from 1991 to 1993. In 1993, Summers was appointed Under Secretary for International Affairs of the United States Department of the Treasury under President Bill Clinton's administration. In 1995, he was promoted to Deputy Secretary of the Treasury under his long-time political mentor Robert Rubin. In 1999, he succeeded Rubin as Secretary of the Treasury. While working for the Clinton administration, Summers played a leading role in the American response to the 1994 economic crisis in Mexico, the 1997 Asian financial crisis, and the 1998 Russian financial crisis. He was also influential in the Harvard Institute for International Development and American-advised privatization of the economies of the post-Soviet states, and in the deregulation of the U.S. financial system, including the repeal of the Glass–Steagall Act. Following the end of Clinton's term, Summers served as the 27th president of Harvard University from 2001 to 2006. Summers resigned as Harvard's president in the wake of a no-confidence vote by Harvard faculty, which resulted in large part from Summers's conflict with Cornel West, financial conflict of interest questions regarding his relationship with Andrei Shleifer, and a 2005 speech in which he offered three reasons for the under-representation of women in science and engineering, including the possibility that there exists a "different availability of aptitude at the high end", in addition to patterns of discrimination and socialization. After his departure from Harvard, Summers worked as a managing partner at the hedge fund D. E. Shaw & Co. Summers rejoined public service during the Obama administration, serving as the director of the White House United States National Economic Council for President Barack Obama from January 2009 until November 2010, where he emerged as a key economic decision-maker in the Obama administration's response to the Great Recession. In November 2023, Summers joined the board of directors of artificial intelligence organization OpenAI, before resigning in November 2025 after revelations about his ties to child sex offender Jeffrey Epstein. Summers was involved in Genie Energy and the University of Austin. Early life and education Summers was born in New Haven, Connecticut, on November 30, 1954, into a Jewish family. He was the son of two economists, Robert Summers (who changed the family surname from Samuelson) and Anita Summers (of Romanian-Jewish ancestry), who were both professors at the University of Pennsylvania. He is also the nephew of two Nobel laureates in economics: Paul Samuelson (brother of Robert Summers) and Kenneth Arrow (brother of Anita Arrow Summers). He spent most of his childhood in Penn Valley, Pennsylvania, a suburb of Philadelphia, where he attended Harriton High School. At age 16, he entered the Massachusetts Institute of Technology (MIT), where he originally intended to study physics but soon switched to economics, graduating in 1975. He was also an active member of the MIT debating team and qualified for participation in the annual National Debate Tournament three times. He attended Harvard University as a graduate student, receiving his Ph.D. in 1982. In 1983, at age 28, Summers became one of the youngest tenured professors in Harvard's history. He was a visiting academic at the London School of Economics in 1987. Career As a researcher, Summers has made important contributions in many areas of economics, primarily public finance, labor economics, financial economics, and macroeconomics. Summers has also worked in international economics, economic demography, economic history and development economics. He received the John Bates Clark Medal in 1993 from the American Economic Association. In 1987, he was the first social scientist to win the Alan T. Waterman Award from the National Science Foundation. Summers is also a member of the National Academy of Sciences. Some of his popular courses today, as Charles W. Eliot University Professor at Harvard University, include American Economic Policy and The Political Economy of Globalization. Summers was on the staff of the Council of Economic Advisers under President Reagan in 1982–1983. He also served as an economic adviser to the Dukakis Presidential campaign in 1988. Summers left Harvard in 1991 and served as the Vice President of Development Economics and Chief Economist for the World Bank until 1993. According to the World Bank's Data & Research office, Summers returned to Washington, D.C., in 1991 as the World Bank's Vice President of Development Economics and Chief Economist. As such, Summers played a "key role" in designing strategies to aid developing countries, worked on the bank's loan committee, guided the bank's research and statistics operations, and guided external training programs. The World Bank's official site also reports that Summers's research included an "influential" report that demonstrated a very high return from investments in educating girls in developing nations. According to The Economist, Summers was "often at the centre of heated debates" about economic policy, as he was considered a "famous contrarian". In December 1991, while at the World Bank, Summers signed a memo that was leaked to the press. Lant Pritchett has claimed authorship of the private memo, which both he and Summers say was intended as sarcasm. The memo stated that "the economic logic behind dumping a load of toxic waste in the lowest wage country is impeccable and we should face up to that. ... I've always thought that under-populated countries in Africa are vastly underpolluted." According to Pritchett, the memo, as leaked, was doctored to remove context and intended irony. In 1993, Summers was appointed Undersecretary for International Affairs and later in the United States Department of the Treasury under the Clinton Administration. In 1995, he was promoted to Deputy Secretary of the Treasury under his long-time political mentor Robert Rubin. In 1999, he succeeded Rubin as Secretary of the Treasury. Much of Summers's tenure at the Treasury Department was focused on international economic issues. He was deeply involved in the Clinton administration's effort to bail out Mexico and Russia when those nations had currency crises. Summers set up a project through which the Harvard Institute for International Development provided advice to the Russian government between 1992 and 1997. Later there was a scandal when it emerged that some of the Harvard project members had invested in Russia and were therefore not impartial advisors. Summers encouraged then-Russian leader Boris Yeltsin to use the same "three-'ations'" of policy he advocated in the Clinton Administration – "privatization, stabilization, and liberalization". Summers pressured the Korean government to raise its interest rates and balance its budget in the midst of a recession, policies criticized by Paul Krugman and Joseph Stiglitz. According to the book The Chastening, by Paul Blustein, during this crisis, Summers, along with Paul Wolfowitz, pushed for regime change in Indonesia. Summers was a leading voice within the Clinton Administration arguing against American leadership in greenhouse gas reductions and against US participation in the Kyoto Protocol, according to internal documents made public in 2009. As Treasury Secretary, Summers led the Clinton Administration's opposition to tax cuts proposed by the Republican Congress in 1999. During the California energy crisis of 2000, then-Treasury Secretary Summers teamed with Alan Greenspan and Enron executive Kenneth Lay to lecture California Governor Gray Davis on the causes of the crisis, explaining that the problem was excessive government regulation. Under the advice of Kenneth Lay, Summers urged Davis to relax California's environmental standards in order to reassure the markets. Summers hailed the Gramm–Leach–Bliley Act in 1999, which lifted more than six decades of restrictions against banks offering commercial banking, insurance, and investment services (by repealing key provisions in the 1933 Glass–Steagall Act): "Today Congress voted to update the rules that have governed financial services since the Great Depression and replace them with a system for the 21st century," Summers said. "This historic legislation will better enable American companies to compete in the new economy." Many critics, including President Barack Obama, have suggested the subprime mortgage crisis of 2007-2010 was caused by the partial repeal of the 1933 Glass–Steagall Act. As a member of President Clinton's Working Group on Financial Markets, Summers, along with U.S. Securities and Exchange Commission (SEC) Chairman Arthur Levitt, Fed Chairman Greenspan, and Secretary Rubin, torpedoed an effort to regulate the financial derivatives that many blame for bringing the financial market down in Fall 2008. On May 7, 1998, the Commodity Futures Trading Commission (CFTC) issued a Concept Release soliciting input from regulators, academics, and practitioners to determine "how best to maintain adequate regulatory safeguards without impairing the ability of the OTC (over-the-counter) derivatives market to grow and the ability of U.S. entities to remain competitive in the global financial marketplace." On July 30, 1998, then-Deputy Secretary of the Treasury Summers testified before the U.S. Congress that "the parties to these kinds of contract are largely sophisticated financial institutions that would appear to be eminently capable of protecting themselves from fraud and counterparty insolvencies." At the time Summers stated that "to date there has been no clear evidence of a need for additional regulation of the institutional OTC derivatives market, and we would submit that proponents of such regulation must bear the burden of demonstrating that need." In 1999 Summers endorsed the Gramm–Leach–Bliley Act which removed the separation between investment and commercial banks, saying "With this bill, the American financial system takes a major step forward towards the 21st Century." When George Stephanopoulos asked Summers about the 2008 financial crisis in an ABC interview on March 15, 2009, Summers replied that "there are a lot of terrible things that have happened in the last eighteen months, but what's happened at A.I.G. ... the way it was not regulated, the way no one was watching ... is outrageous." In February 2009, Summers quoted John Maynard Keynes, saying "When circumstances change, I change my opinion", reflecting both on the failures of Wall Street deregulation and his new leadership role in the government bailout. On April 18, 2010, in an interview on ABC's This Week program, Clinton said Summers was wrong in the advice he gave him not to regulate derivatives. In 2001, when George W. Bush became President, Summers left the Treasury Department and returned to Harvard as its 27th president, serving from July 2001 until June 2006. He was Harvard's first Jewish president, though his predecessor Neil Rudenstine's father was Jewish. A number of Summers's decisions at Harvard have attracted public controversy, either at the time or since his resignation. In an October 2001 meeting, Summers criticized African American Studies department head Cornel West for allegedly missing three weeks of classes to work on the Bill Bradley presidential campaign and complained that West was contributing to grade inflation. Summers also claimed that West's "rap" album was an "embarrassment" to the university. West pushed back strongly against the accusations. "The hip-hop scared him. It's a stereotypical reaction", he said later. West, who later called Summers both "uninformed" and "an unprincipled power player" in describing this encounter in his book Democracy Matters (2004), subsequently returned to Princeton University, where he had taught prior to Harvard University. In January 2005, at a Conference on Diversifying the Science & Engineering Workforce sponsored by the National Bureau of Economic Research, Summers sparked controversy with his discussion of why women may have been underrepresented "in tenured positions in science and engineering at top universities and research institutions". The conference was designed to be off-the-record so that participants could speak candidly without fear of public misunderstanding or disclosure later. Summers had prefaced his talk, saying he was adopting an "entirely positive, rather than normative approach" and that his remarks were intended to be an "attempt at provocation". Summers then began by identifying three hypotheses for the higher proportion of men in high-end science and engineering positions: The second hypothesis, the generally greater variability among men (compared to women) in tests of cognitive abilities, leading to proportionally more males than females at both the lower and upper tails of the test score distributions, caused the most controversy. In his discussion of this hypothesis, Summers said that "even small differences in the standard deviation [between genders] will translate into very large differences in the available pool substantially out [from the mean]". Summers referenced research that implied differences between the standard deviations of males and females in the top 5% of twelfth graders under various tests. He then went on to argue that, if this research were to be accepted, then "whatever the set of attributes ... that are precisely defined to correlate with being an aeronautical engineer at MIT or being a chemist at Berkeley ... are probably different in their standard deviations as well". Summers then concluded his discussion of the three hypotheses by saying: So my best guess, to provoke you, of what's behind all of this is that the largest phenomenon, by far, is the general clash between people's legitimate family desires and employers' current desire for high power and high intensity, that in the special case of science and engineering, there are issues of intrinsic aptitude, and particularly of the variability of aptitude, and that those considerations are reinforced by what are in fact lesser factors involving socialization and continuing discrimination. I would like nothing better than to be proved wrong, because I would like nothing better than for these problems to be addressable simply by everybody understanding what they are, and working very hard to address them. Summers then went on to discuss approaches to remedying the shortage of women in high-end science and engineering positions. This lunch-time talk drew accusations of sexism and careless scholarship, and an intense negative response followed, both nationally and at Harvard. Summers apologized repeatedly. Nevertheless, the controversy is speculated to have contributed to his resigning his position as president of Harvard University the following year, as well as costing Summers the job of Treasury Secretary in Obama's administration. Summers's protégée Sheryl Sandberg has defended him, saying that "Larry has been a true advocate for women throughout his career" at the World Bank and Treasury. Referring to the lunch talk, Sandberg said, "What few seem to note is that it is remarkable that he was giving the speech in the first place – that he cared enough about women's careers and their trajectory in the fields of math and science to proactively analyze the issues and talk about what was going wrong". In 2016, remarking upon political correctness in institutions of higher education, Summers said: There is a great deal of absurd political correctness. Now, I'm somebody who believes very strongly in diversity, who resists racism in all of its many incarnations, who thinks that there is a great deal that's unjust in American society that needs to be combated, but it seems to be that there is a kind of creeping totalitarianism in terms of what kind of ideas are acceptable and are debatable on college campuses. On March 15, 2005, members of the Harvard Faculty of Arts and Sciences, which instructs graduate students in Harvard Graduate School of Arts and Sciences and undergraduates in Harvard College, passed 218–185 a motion of "lack of confidence" in the leadership of Summers, with 18 abstentions. A second motion that offered a milder censure of the president passed 253 to 137, also with 18 abstentions. The members of the Harvard Corporation, the university's highest governing body, are in charge of the selection of the president and issued statements strongly supporting Summers. FAS faculty were not unanimous in their comments against Summers. Psychologist Steven Pinker defended the legitimacy of Summers's January lecture. When asked if Summers's talk was "within the pale of legitimate academic discourse," Pinker responded "Good grief, shouldn't everything be within the pale of legitimate academic discourse, as long as it is presented with some degree of rigor? That's the difference between a university and a madrassa. There is certainly enough evidence for the hypothesis to be taken seriously." Summers had stronger support among Harvard College students than among the college faculty. One poll by The Harvard Crimson indicated that students opposed his resignation by a three-to-one margin, with 57% of responding students opposing his resignation and 19% supporting it. In July 2005, a board member of Harvard Corporation, Conrad K. Harper, resigned saying he was angered both by the university president's comments about women and by Summers being given a salary increase. The resignation letter to the president said, "I could not and cannot support a raise in your salary, ... I believe that Harvard's best interests require your resignation." Harvard and Andrei Shleifer, a close friend and protégé of Summers, controversially paid $28.5 million to settle a lawsuit by the U.S. government over the conflict of interest Shleifer had while advising Russia's privatization program. The US government had sued Shleifer under the False Claims Act, as he bought Russian stocks while designing the country's privatization. In 2004, a federal judge ruled that while Harvard had violated the contract, Shleifer and his associate alone were liable for treble damages. In June 2005, Harvard and Shleifer announced that they had reached a tentative settlement with the US government. In August, Harvard, Shleifer, and the Department of Justice reached an agreement under which the university paid $26.5 million to settle the five-year-old lawsuit. Shleifer was also responsible for paying $2 million worth of damages. Because Harvard paid almost all of the damages and allowed Shleifer to retain his faculty position, the settlement provoked allegations of favoritism by Summers. His continued support for Shleifer weakened Summers's popularity with other professors, as reported in The Harvard Crimson: I've been a member of this Faculty for over 45 years, and I am no longer easily shocked," is how Frederick H. Abernathy, the McKay professor of mechanical engineering, began his biting comments about the Shleifer case at Tuesday's fiery Faculty meeting. But, Abernathy continued, "I was deeply shocked and disappointed by the actions of this University" in the Shleifer affair. An 18,000-word article "How Harvard Lost Russia" in Institutional Investor by David McClintick detailed Shleifer's alleged efforts to use his inside knowledge of and sway over the Russian economy in order to make lucrative personal investments, all while leading a Harvard group, advising the Russian government, that was under contract with the U.S. The article suggests that Summers shielded his fellow economist from disciplinary action by the university, and it noted that Summers had forewarned Shleifer and his wife Nancy Zimmerman about the conflict-of-interest regulations back in 1996. Summers's friendship with Shleifer was well known by the corporation when it selected him to succeed Rudenstine and Summers recused himself from all proceedings with Shleifer, whose case was actually handled by an independent committee led by former Harvard president Derek Bok. An article in The Harvard Crimson in 2003, during Summers's tenure as president, detailed a reportedly "special connection" between Summers and Jeffrey Epstein. Epstein pledged to donate at least $25 million to Harvard during Summers's tenure to endow Harvard's Program for Evolutionary Dynamics, and Epstein was given an office at Harvard for his personal use. Epstein otherwise had no formal connection to Harvard. Summers's ties to Epstein reportedly began "a number of years...before Summers became Harvard's president and even before he was the Secretary of the Treasury." Flight records introduced as evidence in the 2021 trial of Epstein associate Ghislaine Maxwell show that Summers flew on Jeffrey Epstein's private plane on at least four occasions, including once in 1998 when Summers was United States Deputy Secretary of the Treasury and at least three times while Harvard president. A charity funded by Epstein also donated to the production of a PBS show hosted by Summers's wife and Harvard professor Elisa New. In 2014, Summers emailed Epstein requesting "small scale philanthropy advice" for his wife's nonprofit, Verse Video Education. Documents released by Congress on November 12, 2025, revealed frequent email communication between the two from 2017 to 2019. From November 2018 to July 5, 2019, a day before Epstein's arrest, Summers sought advice from him on how to pursue a sexual relationship with a woman he described as a mentee. In a 2017 email he implied to Epstein that women on average had lower IQ than men. Summers issued a statement that his association with Epstein was "a major error of judgement". On November 14, 2025, President Trump directed the U.S. Department of Justice to investigate Epstein's relationship with, among others, Summers. However, some, including U.S. House of Representatives member Thomas Massie (R-Kentucky), noted that this and the other new Department of Justice investigations against Epstein may have been intended to distract the U.S. Department of Justice and prevent release of the Epstein Files at an earlier date. On November 17, 2025, Summers agreed to step back from his public commitments such as his role in the advisory group of The Yale Budget Lab, his role in the advisory group of The Hamilton Project (an economics policy arm of the Brookings Institution), his fellowship with the Center for American Progress, and his role as chair of the Center for Global Development. On November 18, 2025, Summers also ended his role as a paid contributor to Bloomberg News. On November 19, Summers resigned from the OpenAI board following the release of the Epstein emails. Summers had also been on the advisory board of SandboxAQ since August 2024; as of 19 November 2025[update], he was no longer listed as an advisor. On December 2, 2025, the American Economic Association (AEA) imposed a lifetime ban on Summers, prohibiting him from holding membership in the association or participating in any AEA-sponsored events, including attending or speaking at its activities. In February 2004, the Winklevoss twins requested a meeting with Summers in order to ask him to intervene on their behalf in an ongoing dispute they had with Facebook founder Mark Zuckerberg. The Winklevosses believed that Zuckerberg had stolen their idea for a social networking website and launched Facebook on his own, after they had asked him to be a part of their project, then called HarvardConnection. Summers believed that the matter was outside the university's jurisdiction and advised the twins to take their complaint to the courts. On February 21, 2006, Summers announced his intention to step down at the end of the school year effective June 30, 2006. Harvard agreed to provide Summers on his resignation with a one-year paid sabbatical leave, subsidized a $1 million outstanding loan from the university for his personal residence, and provided other payments. Former University President Derek Bok acted as Interim President while the university conducted a search for a replacement which ended with the naming of Drew Gilpin Faust on February 11, 2007. After a one-year sabbatical, Summers subsequently accepted Harvard University's invitation to serve as the Charles W. Eliot University Professor, one of 20 select University-wide professorships, with offices in the Kennedy School of Government and the Harvard Business School. In 2006 he was also a member of the Panel of Eminent Persons which reviewed the work of the United Nations Conference on Trade and Development. He is a member in the Group of Thirty. He also currently serves on the Berggruen Institute's 21st Century Council and was part of a 2015 Berggruen-organized meeting with Chinese president Xi Jinping. On October 19, 2006, Summers was hired as a part-time managing director of the New York-based hedge fund D. E. Shaw & Co. for which he received $5 million in salary and other compensation over a 16-month period. At the same time Summers earned $2.7 million in speaking fees from major financial institutions, including Goldman Sachs, JPMorgan Chase, Citigroup, Merrill Lynch and Lehman Brothers. Upon being nominated Treasury Secretary by President Clinton in 1999, Summers listed assets of about $900,000 and debts, including a mortgage, of $500,000. By the time he returned in 2009 to serve in the Obama administration, he reported a net worth between $17 million and $39 million. He is a former member of the Steering Committee of the Bilderberg Group. In 2013, Summers became an early angel investor in India's first car rental company, Zoomcar, which was started by his former Harvard Teaching Fellow. Upon the inauguration of Barack Obama as president in January 2009, Summers was appointed to the post of director of the National Economic Council. In this position Summers emerged as a key economic decision-maker in the Obama administration, where he attracted both praise and criticism. There had been friction between Summers and former Federal Reserve Chairman Paul Volcker, as Volcker accused Summers of delaying the effort to organize a panel of outside economic advisers, and Summers had cut Volcker out of White House meetings and had not shown interest in collaborating on policy solutions to the economic crisis. On the other hand, Obama himself was reportedly thrilled with the work Summers did in his first few weeks on the job. And Peter Orszag, another top economic advisor, called Summers "one of the world's most brilliant economists." According to Henry Kissinger Larry Summers should "be given a White House post in which he was charged with shooting down or fixing bad ideas". In January 2009, as the Obama Administration tried to pass an economic stimulus spending bill, Representative Peter DeFazio (D-OR) criticized Summers, saying that he thought that President Barack Obama is "ill-advised by Larry Summers. Larry Summers hates infrastructure." DeFazio, along with liberal economists including Paul Krugman and Joseph Stiglitz, had argued that more of the stimulus should be spent on infrastructure, while Summers had supported tax cuts. In late 2008, Summers and economic advisors for then-President-elect Obama presented a memo with options for an economic stimulus package ranging from $550 billion to $900 billion. According to The New Republic, economic advisor Christina Romer initially recommended a $1.8-trillion package, which proposal Summers quickly rejected, believing any stimulus approaching $1 trillion would not pass through Congress. Romer revised her recommendation to $1.2 trillion, which Summers agreed to include in the memo, but Summers struck the figure at the last minute. According to the Wall Street Journal, Summers called Senator Chris Dodd (D-CT) asking him to remove caps on executive pay at firms that have received stimulus money, including Citigroup. On April 3, 2009, Summers came under renewed criticism after it was disclosed that he was paid millions of dollars the previous year by companies which he now had influence over as a public servant. He earned $5 million from the hedge fund D.E. Shaw and collected $2.7 million in speaking fees from Wall Street companies that received government bailout money. Since leaving the NEC in December 2010, Summers has worked as an advisor to hedge fund D. E. Shaw & Co., Citigroup and the NASDAQ OMX Group while resuming his role as a tenured Harvard professor. In June 2011 Summers joined the board of directors of Square, a company developing an electronic payment service, and became a special adviser at venture capital firm Andreessen Horowitz. He joined the board of person-to-person lending company Lending Club in December 2012. In July 2015 Summers joined the Board of Directors of Premise Data, a San Francisco-based data and analytics technology company that sources data from a global network of on-the-ground contributors. In April 2016, he was one of eight former Treasury secretaries who called on the United Kingdom to remain a member of the European Union ahead of the June 2016 Referendum. Summers referred to the United Kingdom's Brexit vote on June 23, 2016, in favor of leaving the European Union as the "worst self-inflicted policy wound that a country has done since the Second World War". However, Summers cautioned that the result was a "wake up call for elites everywhere" and called for "responsible nationalism" in response to simmering public sentiment. In June 2016, Summers also wrote, "I believe the risks to the US and global economies of Mr Trump's election as president are far greater [than passage of Brexit]. If he is elected, I would expect a protracted recession to begin within 18 months. The damage would be felt far beyond the United States." A coalition of progressive groups called on Joe Biden's 2020 presidential campaign no longer to use Summers as an advisor, after reports surfaced that Summers was advising the campaign on economic policy. Progressive groups like the Sunrise Movement and Justice Democrats petitioned the campaign to disavow Summers, saying, "Summers's legacy is advocating for policies that contributed to the skyrocketing inequality and climate crisis we're living with today." Following the outcry, Summers stated he would not be joining a future Biden administration, in the event that Biden defeated Donald Trump in the 2020 presidential election. In 2013, Summers emerged as one of two leading candidates, along with Janet Yellen, to succeed Ben Bernanke as chair of the Federal Reserve. The possibility of his nomination created a great deal of controversy with some senators of both parties declaring opposition. On September 15, Summers withdrew his name from consideration for the position, writing: "I have reluctantly concluded that any possible confirmation process for me would be acrimonious and would not serve the interest of the Federal Reserve, the Administration or, ultimately, the interests of the nation's ongoing economic recovery." During 2013, Summers had been reported as preferred candidate by the Cabinet of Israel and Prime Minister Benjamin Netanyahu to succeed Stanley Fischer as governor of the Bank of Israel. Netanyahu personally asked him to take the post, an offer he turned down. Summers emerged as an early opponent of President Joe Biden's economic policy, calling the $1.9 trillion American Rescue Plan Act of 2021 "the least responsible macroeconomic policy we've had in the last 40 years" and arguing that it risked economic recession and market destabilization. In October 2023, following the October 7 attacks and the subsequent Gaza war, several Harvard undergraduate student groups signed a letter condemning Israel, holding it "entirely responsible for all unfolding violence". The letter led to a backlash from several prominent Harvard alumni, including Summers, who said that he was "sickened" by it. Summers, though agreeing with Bill Ackman on the need to examine the political views of employees, called Ackman's request to release the names of all the students involved in signing the letter "the stuff of Joe McCarthy". Summers has criticized the Harvard administration for its failure to curb what he sees as rising antisemitism at the university since the Hamas attack. In March 2025, he expressed concern that the Harvard Corporation, the university's highest governing body, was inadequately addressing antisemitism on campus; specifically, Summers criticized current Harvard President Alan Garber for failing to issue a final report with recommendations despite Garber having convened a task force on combating antisemitism over a year earlier, in January 2024. Personal life Summers was diagnosed with Hodgkin's lymphoma around 1983, underwent treatment and has remained cancer-free. Summers has three children with his first wife, Victoria Joanne (Perry). In December 2005, Summers married English professor Elisa New at Elmwood and spent his honeymoon on Jeffrey Epstein's island. He lives in Brookline, Massachusetts. In popular culture The 2010 film The Social Network, which deals with the founding of the social networking site Facebook, shows Summers (played by Douglas Urbanski), in his then-capacity as President of Harvard, meeting with Cameron and Tyler Winklevoss to discuss their accusations against Mark Zuckerberg. In the 2010 documentary Inside Job, Summers is presented as one of the key figures behind the 2008 financial crisis. Charles Ferguson points out the economist's role in what he characterizes as the deregulation of many domains of the financial sector. See also References External links
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