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18974125 | https://en.wikipedia.org/wiki/Bacillus%20anthracis | Bacillus anthracis | Bacillus anthracis is a gram-positive and rod-shaped bacterium that causes anthrax, a deadly disease to livestock and, occasionally, to humans. It is the only permanent (obligate) pathogen within the genus Bacillus. Its infection is a type of zoonosis, as it is transmitted from animals to humans. It was discovered by a... | Biology and health sciences | Gram-positive bacteria | Plants |
78478 | https://en.wikipedia.org/wiki/Canyon | Canyon | A canyon (from ; archaic British English spelling: cañon), gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sedi... | Physical sciences | Fluvial landforms | null |
78490 | https://en.wikipedia.org/wiki/Exosphere | Exosphere | The exosphere is a thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body, but where the density is so low that the molecules are essentially collision-less. In the case of bodies with substantial atmospheres, such as Earth's atmosphere, the exosphe... | Physical sciences | Atmosphere: General | Earth science |
78517 | https://en.wikipedia.org/wiki/Fluorocarbon | Fluorocarbon | Fluorocarbons are chemical compounds with carbon-fluorine bonds. Compounds that contain many C-F bonds often have distinctive properties, e.g., enhanced stability, volatility, and hydrophobicity. Several fluorocarbons and their derivatives are commercial polymers, refrigerants, drugs, and anesthetics.
Nomenclature
P... | Physical sciences | Halocarbons | Chemistry |
78534 | https://en.wikipedia.org/wiki/Geomorphology | Geomorphology | Geomorphology () is the scientific study of the origin and evolution of topographic and bathymetric features generated by physical, chemical or biological processes operating at or near Earth's surface. Geomorphologists seek to understand why landscapes look the way they do, to understand landform and terrain history a... | Physical sciences | Geomorphology | null |
78547 | https://en.wikipedia.org/wiki/Temperate%20grasslands%2C%20savannas%2C%20and%20shrublands | Temperate grasslands, savannas, and shrublands | Temperate grasslands, savannas, and shrublands are terrestrial biomes defined by the World Wide Fund for Nature. The predominant vegetation in these biomes consists of grass and/or shrubs. The climate is temperate and ranges from semi-arid to semi-humid. The habitat type differs from tropical grasslands in the annual t... | Physical sciences | Grasslands | Earth science |
78768 | https://en.wikipedia.org/wiki/Proxy%20server | Proxy server | In computer networking, a proxy server is a server application that acts as an intermediary between a client requesting a resource and the server providing that resource. It improves privacy, security, and possibly performance in the process.
Instead of connecting directly to a server that can fulfill a request for a ... | Technology | Networks | null |
78882 | https://en.wikipedia.org/wiki/Pan%20%28genus%29 | Pan (genus) | The genus Pan consists of two extant species: the chimpanzee and the bonobo. Taxonomically, these two ape species are collectively termed panins. The two species were formerly collectively called "chimpanzees" or "chimps"; if bonobos were recognized as a separate group at all, they were referred to as "pygmy" or "graci... | Biology and health sciences | Primates | null |
78897 | https://en.wikipedia.org/wiki/Boraginaceae | Boraginaceae | Boraginaceae, the borage or forget-me-not family, includes about 2,000 species of shrubs, trees, and herbs in 146 to 154 genera with a worldwide distribution.
The APG IV system from 2016 classifies the Boraginaceae as single family of the order Boraginales within the asterids. Under the older Cronquist system, it was ... | Biology and health sciences | Boraginales | Plants |
78918 | https://en.wikipedia.org/wiki/Oleaceae | Oleaceae | Oleaceae, also known as the olive family or sometimes the lilac family, is a taxonomic family of flowering shrubs, trees, and a few lianas in the order Lamiales. It presently comprises 28 genera, one of which is recently extinct. The extant genera include Cartrema, which was resurrected in 2012. The number of species i... | Biology and health sciences | Lamiales | null |
79150 | https://en.wikipedia.org/wiki/Feigenbaum%20constants | Feigenbaum constants | In mathematics, specifically bifurcation theory, the Feigenbaum constants and are two mathematical constants which both express ratios in a bifurcation diagram for a non-linear map. They are named after the physicist Mitchell J. Feigenbaum.
History
Feigenbaum originally related the first constant to the period-doub... | Mathematics | Basics | null |
79270 | https://en.wikipedia.org/wiki/Cartridge%20%28firearms%29 | Cartridge (firearms) | A cartridge, also known as a round, is a type of pre-assembled firearm ammunition packaging a projectile (bullet, shot, or slug), a propellant substance (smokeless powder, black powder substitute, or black powder) and an ignition device (primer) within a metallic, paper, or plastic case that is precisely made to fit wi... | Technology | Ammunition | null |
79308 | https://en.wikipedia.org/wiki/Skunk | Skunk | Skunks are mammals in the family Mephitidae. They are known for their ability to spray a liquid with a strong, unpleasant scent from their anal glands. Different species of skunk vary in appearance from black-and-white to brown, cream or ginger colored, but all have warning coloration.
While related to polecats and ot... | Biology and health sciences | Carnivora | null |
79327 | https://en.wikipedia.org/wiki/Atlantic%20canary | Atlantic canary | The Atlantic canary (Serinus canaria), known worldwide simply as the wild canary and also called the island canary, common canary, or canary, is a small passerine bird belonging to the genus Serinus in the true finch family, Fringillidae. It is native to the Canary Islands, the Azores, and Madeira. It has two subspecie... | Biology and health sciences | Passerida | Animals |
79449 | https://en.wikipedia.org/wiki/Multiple%20birth | Multiple birth | A multiple birth is the culmination of one multiple pregnancy, wherein the mother gives birth to two or more babies. A term most applicable to vertebrate species, multiple births occur in most kinds of mammals, with varying frequencies. Such births are often named according to the number of offspring, as in twins and t... | Biology and health sciences | Human reproduction | Biology |
79487 | https://en.wikipedia.org/wiki/Tahr | Tahr | Tahrs ( , ) or tehrs ( ) are large artiodactyl ungulates related to goats and sheep. There are three species, all native to Asia. Previously thought to be closely related to each other and placed in a single genus, Hemitragus, genetic studies have since proven that they are not so closely related and they are now cons... | Biology and health sciences | Bovidae | Animals |
79537 | https://en.wikipedia.org/wiki/Flight%20instruments | Flight instruments | Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with data about the flight situation of that aircraft, such as altitude, airspeed, vertical speed, heading and much more other crucial information in flight. They improve safety by allowing the pilot to fly the aircraft in leve... | Technology | Aircraft components | null |
79648 | https://en.wikipedia.org/wiki/Pinto%20bean | Pinto bean | The pinto bean () is a variety of common bean (Phaseolus vulgaris). In Spanish they are called . It is the most popular bean by crop production in Northern Mexico and the Southwestern United States, and is most often eaten whole (sometimes in broth), or mashed and then refried. Prepared either way, it is a common filli... | Biology and health sciences | Pulses | Plants |
79658 | https://en.wikipedia.org/wiki/Lychee | Lychee | Lychee ( , ; Litchi chinensis; ) is a monotypic taxon and the sole member in the genus Litchi in the soapberry family, Sapindaceae.
There are three distinct subspecies of lychee. The most common is the Indochinese lychee found in South China, Malaysia, and northern Vietnam. The other two are the Philippine lychee (lo... | Biology and health sciences | Sapindales | null |
79683 | https://en.wikipedia.org/wiki/Rutaceae | Rutaceae | The Rutaceae () is a family, commonly known as the rue or citrus family, of flowering plants, usually placed in the order Sapindales.
Species of the family generally have flowers that divide into four or five parts, usually with strong scents. They range in form and size from herbs to shrubs and large trees.
The most... | Biology and health sciences | Sapindales | Plants |
79713 | https://en.wikipedia.org/wiki/Cantaloupe | Cantaloupe | The cantaloupe ( ) is a type of true melon (Cucumis melo) with sweet, aromatic, and usually orange flesh. Originally, cantaloupe refers to the true cantaloupe or European cantaloupe with non- to slightly netted and often ribbed rind. Today, it also refers to the muskmelon with strongly netted rind, which is called cant... | Biology and health sciences | Melons | Plants |
79717 | https://en.wikipedia.org/wiki/U.S.%20Route%2066 | U.S. Route 66 | U.S. Route 66 or U.S. Highway 66 (US 66 or Route 66) is one of the original highways in the United States Numbered Highway System. It was established on November 11, 1926, with road signs erected the following year. The highway, which became one of the most famous roads in the United States, ran from Chicago, Illinois,... | Technology | Ground transportation networks | null |
79726 | https://en.wikipedia.org/wiki/Toll%20road | Toll road | A toll road, also known as a turnpike or tollway, is a public or private road for which a fee (or toll) is assessed for passage. It is a form of road pricing typically implemented to help recoup the costs of road construction and maintenance.
Toll roads have existed in some form since antiquity, with tolls levied on ... | Technology | Road infrastructure | null |
79745 | https://en.wikipedia.org/wiki/Cluster%20munition | Cluster munition | A cluster munition is a form of air-dropped or ground-launched explosive weapon that releases or ejects smaller submunitions. Commonly, this is a cluster bomb that ejects explosive bomblets that are designed to kill personnel and destroy vehicles. Other cluster munitions are designed to destroy runways or electric powe... | Technology | Explosive weapons | null |
80130 | https://en.wikipedia.org/wiki/3%20Juno | 3 Juno | Juno (minor-planet designation: 3 Juno) is a large asteroid in the asteroid belt. Juno was the third asteroid discovered, in 1804, by German astronomer Karl Harding. It is tied with three other asteroids as the thirteenth largest asteroid, and it is one of the two largest stony (S-type) asteroids, along with 15 Eunomia... | Physical sciences | Solar System | Astronomy |
80169 | https://en.wikipedia.org/wiki/Buckwheat | Buckwheat | Buckwheat (Fagopyrum esculentum) or common buckwheat is a flowering plant in the knotweed family Polygonaceae cultivated for its grain-like seeds and as a cover crop. Buckwheat originated around the 6th millennium BCE in the region of what is now Yunnan Province in southwestern China. The name "buckwheat" is used for ... | Biology and health sciences | Caryophyllales | null |
80207 | https://en.wikipedia.org/wiki/Sodium%20chloride | Sodium chloride | Sodium chloride , commonly known as edible salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chlorine ions. It is transparent or translucent, brittle, hygroscopic, and occurs as the mineral halite. In its edible form, it is commonly used as a condiment and food preservati... | Physical sciences | Salts | null |
80381 | https://en.wikipedia.org/wiki/Health | Health | Health has a variety of definitions, which have been used for different purposes over time. In general, it refers to physical and emotional well-being, especially that associated with normal functioning of the human body, absent of disease, pain (including mental pain), or injury.
Health can be promoted by encouraging... | Biology and health sciences | Health, fitness, and medicine | null |
80393 | https://en.wikipedia.org/wiki/Echidna | Echidna | Echidnas (), sometimes known as spiny anteaters, are quill-covered monotremes (egg-laying mammals) belonging to the family Tachyglossidae , living in Australia and New Guinea. The four extant species of echidnas and the platypus are the only living mammals that lay eggs and the only surviving members of the order Monot... | Biology and health sciences | Monotremes | null |
80503 | https://en.wikipedia.org/wiki/Decimal%20separator | Decimal separator | A decimal separator is a symbol that separates the integer part from the fractional part of a number written in decimal form. Different countries officially designate different symbols for use as the separator. The choice of symbol can also affect the choice of symbol for the thousands separator used in digit grouping.... | Mathematics | Basics | null |
80733 | https://en.wikipedia.org/wiki/32-bit%20computing | 32-bit computing | In computer architecture, 32-bit computing refers to computer systems with a processor, memory, and other major system components that operate on data in 32-bit units. Compared to smaller bit widths, 32-bit computers can perform large calculations more efficiently and process more data per clock cycle. Typical 32-bit p... | Technology | Computer architecture concepts | null |
80750 | https://en.wikipedia.org/wiki/Driving | Driving | Driving is the controlled operation and movement of a land vehicle, including cars, motorcycles, trucks, and buses. A driver's permission to drive on public highways is granted based on a set of conditions being met, and drivers are required to follow the established road and traffic laws in the location they are drivi... | Technology | Road transport | null |
80825 | https://en.wikipedia.org/wiki/Free%20fall | Free fall | In classical mechanics, free fall is any motion of a body where gravity is the only force acting upon it.
A freely falling object may not necessarily be falling down in the vertical direction. If the common definition of the word "fall" is used, an object moving upwards is not considered to be falling, but using scient... | Physical sciences | Classical mechanics | Physics |
1114063 | https://en.wikipedia.org/wiki/Ingrown%20nail | Ingrown nail | An ingrown nail, also known as onychocryptosis (from () 'nail' and () 'hidden') is a common form of nail disease. It is an often painful condition in which the nail grows so that it cuts into one or both sides of the paronychium or nail bed. While ingrown nails can occur in the nails of both the hands and the feet, t... | Biology and health sciences | Types | Health |
1114337 | https://en.wikipedia.org/wiki/Hydrogen%20bromide | Hydrogen bromide | Hydrogen bromide is the inorganic compound with the formula . It is a hydrogen halide consisting of hydrogen and bromine. A colorless gas, it dissolves in water, forming hydrobromic acid, which is saturated at 68.85% HBr by weight at room temperature. Aqueous solutions that are 47.6% HBr by mass form a constant-boilin... | Physical sciences | Hydrogen compounds | Chemistry |
1115940 | https://en.wikipedia.org/wiki/Alligator%20snapping%20turtle | Alligator snapping turtle | The alligator snapping turtle (Macrochelys temminckii) is a large species of turtle in the family Chelydridae. The species is endemic to freshwater habitats in the United States. M. temminckii is one of the heaviest living freshwater turtles in the world. It is the largest freshwater species of turtle in North America.... | Biology and health sciences | Reptiles | null |
1116938 | https://en.wikipedia.org/wiki/Coumarin | Coumarin | Coumarin () or 2H-chromen-2-one is an aromatic organic chemical compound with formula . Its molecule can be described as a benzene molecule with two adjacent hydrogen atoms replaced by an unsaturated lactone ring , forming a second six-membered heterocycle that shares two carbons with the benzene ring. It belongs to t... | Physical sciences | Phenylpropanoids | Chemistry |
1117286 | https://en.wikipedia.org/wiki/Imidazole | Imidazole | Imidazole (ImH) is an organic compound with the formula . It is a white or colourless solid that is soluble in water, producing a mildly alkaline solution. It can be classified as a heterocycle, specifically as a diazole.
Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share t... | Physical sciences | Alkaloids | Chemistry |
1117328 | https://en.wikipedia.org/wiki/Pickaxe | Pickaxe | A pickaxe, pick-axe, or pick is a generally T-shaped hand tool used for prying. Its head is typically metal, attached perpendicularly to a longer handle, traditionally made of wood, occasionally metal, and increasingly fiberglass.
A standard pickaxe, similar to a "pick mattock", has a pointed end on one side of its h... | Technology | Hand tools | null |
1117403 | https://en.wikipedia.org/wiki/Goliath%20frog | Goliath frog | The goliath frog (Conraua goliath), otherwise known commonly as the giant slippery frog and the goliath bullfrog, is a species of frog in the family Conrauidae. The Goliath frog is the largest living frog. Specimens can reach up to about in snout–vent length and in weight. This species has a relatively small habitat ... | Biology and health sciences | Frogs and toads | Animals |
1117409 | https://en.wikipedia.org/wiki/Verbena | Verbena | Verbena (), also known as vervain or verveine, is a genus in the family Verbenaceae. It contains about 150 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia; however, Verbena officinalis, the common vervain or common verbena, is th... | Biology and health sciences | Lamiales | null |
1117429 | https://en.wikipedia.org/wiki/Ivermectin | Ivermectin | Ivermectin is an antiparasitic drug. After its discovery in 1975, its first uses were in veterinary medicine to prevent and treat heartworm and acariasis. Approved for human use in 1987, it is used to treat infestations including head lice, scabies, river blindness (onchocerciasis), strongyloidiasis, trichuriasis, asca... | Biology and health sciences | Antiparasitic | Health |
1117979 | https://en.wikipedia.org/wiki/VSEPR%20theory | VSEPR theory | Valence shell electron pair repulsion (VSEPR) theory ( , ) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. It is also named the Gillespie-Nyholm theory after its two main developers, Ronald Gillespie and Ronald Nyholm.
The ... | Physical sciences | Bond structure | Chemistry |
12293642 | https://en.wikipedia.org/wiki/Boiler%20%28power%20generation%29 | Boiler (power generation) | A boiler or steam generator is a device used to create steam by applying heat energy to water. Although the definitions are somewhat flexible, it can be said that older steam generators were commonly termed boilers and worked at low to medium pressure () but, at pressures above this, it is more usual to speak of a ste... | Technology | Power generation | null |
12304303 | https://en.wikipedia.org/wiki/Trans-African%20Highway%20network | Trans-African Highway network | The Trans-African Highway network comprises transcontinental road projects in Africa being developed by the United Nations Economic Commission for Africa (UNECA), the African Development Bank (ADB), and the African Union in conjunction with regional international communities. They aim to promote trade and alleviate pov... | Technology | Ground transportation networks | null |
12305127 | https://en.wikipedia.org/wiki/History%20of%20life | History of life | The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. The similarities among all known p... | Biology and health sciences | Evolution | null |
9898300 | https://en.wikipedia.org/wiki/Leanchoilia | Leanchoilia | Leanchoilia is a megacheiran arthropod known from Cambrian deposits of the Burgess Shale in Canada and the Chengjiang biota of China.
Description
L. superlata was about long and had long, whip-like flagellae extending from its great appendages. Its internal organs are occasionally preserved within the substrate in ... | Biology and health sciences | Fossil arthropods | Animals |
3246644 | https://en.wikipedia.org/wiki/Fattail%20scorpion | Fattail scorpion | Fattail scorpion or fat-tailed scorpion is the common name given to scorpions of the genus Androctonus, one of the most dangerous groups of scorpion species in the world. The genus was first described in 1828 by Christian Gottfried Ehrenberg.
They are found throughout the semi-arid and arid regions of the Middle East... | Biology and health sciences | Scorpions | Animals |
3246948 | https://en.wikipedia.org/wiki/Silo | Silo | A silo () is a structure for storing bulk materials.
Silos are commonly used for bulk storage of grain, coal, cement, carbon black, woodchips, food products and sawdust. Three types of silos are in widespread use today: tower silos, bunker silos, and bag silos.
Silos are used in agriculture to store fermented feed kn... | Technology | Buildings and infrastructure | null |
2361675 | https://en.wikipedia.org/wiki/New%20Croton%20Dam | New Croton Dam | The New Croton Dam (also known as Cornell Dam) is a dam forming the New Croton Reservoir, both parts of the New York City water supply system. It stretches across the Croton River near Croton-on-Hudson, New York, about north of New York City.
Construction began in 1892 and was completed in 1906. Designed by Alphonse... | Technology | Dams | null |
2362507 | https://en.wikipedia.org/wiki/Uranium%E2%80%93lead%20dating | Uranium–lead dating | Uranium–lead dating, abbreviated U–Pb dating, is one of the oldest and most refined of the radiometric dating schemes. It can be used to date rocks that formed and crystallised from about 1 million years to over 4.5 billion years ago with routine precisions in the 0.1–1 percent range.
The method is usually applied to ... | Physical sciences | Geochronology | Earth science |
2363228 | https://en.wikipedia.org/wiki/Guitarfish | Guitarfish | The guitarfish, also referred to as shovelnose rays, are a family, Rhinobatidae, of rays. The guitarfish are known for an elongated body with a flattened head and trunk and small, ray-like wings. The combined range of the various species is tropical, subtropical, and warm temperate waters worldwide.
Names
In Australia... | Biology and health sciences | Batoidea | Animals |
2366340 | https://en.wikipedia.org/wiki/Fishing%20weir | Fishing weir | A fishing weir, fish weir, fishgarth or kiddle is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a ri... | Technology | Hunting and fishing | null |
2366752 | https://en.wikipedia.org/wiki/High-fructose%20corn%20syrup | High-fructose corn syrup | High-fructose corn syrup (HFCS), also known as glucose–fructose, isoglucose and glucose–fructose syrup, is a sweetener made from corn starch. As in the production of conventional corn syrup, the starch is broken down into glucose by enzymes. To make HFCS, the corn syrup is further processed by D-xylose isomerase to co... | Technology | Food, water and health | null |
16743512 | https://en.wikipedia.org/wiki/Fabric%20%28geology%29 | Fabric (geology) | In geology, a rock's fabric describes the spatial and geometric configuration of all the elements that make it up. In sedimentary rocks, the fabric developed depends on the depositional environment and can provide information on current directions at the time of deposition. In structural geology, fabrics may provide in... | Physical sciences | Structural geology | Earth science |
7647575 | https://en.wikipedia.org/wiki/Five-hundred-meter%20Aperture%20Spherical%20Telescope | Five-hundred-meter Aperture Spherical Telescope | The Five-hundred-meter Aperture Spherical Telescope (FAST; ), nicknamed Tianyan (, lit. "Sky's/Heaven's Eye"), is a radio telescope located in the Dawodang depression (), a natural basin in Pingtang County, Guizhou, southwest China. FAST has a diameter dish constructed in a natural depression in the landscape. It is t... | Technology | Ground-based observatories | null |
393531 | https://en.wikipedia.org/wiki/Deneb | Deneb | Deneb () is a first-magnitude blue supergiant star in the constellation of Cygnus. Deneb is one of the vertices of the asterism known as the Summer Triangle and the "head" of the Northern Cross. It is the brightest star in Cygnus and the 19th brightest star in the night sky, with an average apparent magnitude of +1.25.... | Physical sciences | Notable stars | Astronomy |
393632 | https://en.wikipedia.org/wiki/Wadi | Wadi | Wadi (, alternatively wād; , Maghrebi Arabic oued, ) is the Arabic term traditionally referring to a river valley. In some instances, it may refer to a wet (ephemeral) riverbed that contains water only when heavy rain occurs.
Arroyo (Spanish) is used in the Americas for similar landforms.
Etymology
The term is very ... | Physical sciences | Fluvial landforms | Earth science |
393892 | https://en.wikipedia.org/wiki/Vostok%20programme | Vostok programme | The Vostok programme (; , , translated as "East") was a Soviet human spaceflight project to put the first Soviet cosmonauts into low Earth orbit and return them safely. Competing with the United States Project Mercury, it succeeded in placing the first human into space, Yuri Gagarin, in a single orbit in Vostok 1 on Ap... | Technology | Programs and launch sites | null |
393943 | https://en.wikipedia.org/wiki/Platinum%20group | Platinum group | The platinum-group metals (PGMs), also known as the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs), are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups ... | Physical sciences | d-Block | Chemistry |
394710 | https://en.wikipedia.org/wiki/Induced%20demand | Induced demand | In economics, induced demand – related to latent demand and generated demand – is the phenomenon whereby an increase in supply results in a decline in price and an increase in consumption. In other words, as a good or service becomes more readily available and mass produced, its price goes down and consumers are more l... | Technology | Basics_7 | null |
395186 | https://en.wikipedia.org/wiki/Dry%20lake | Dry lake | A dry lake bed, also known as a playa (), is a basin or depression that formerly contained a standing surface water body, which disappears when evaporation processes exceed recharge. If the floor of a dry lake is covered by deposits of alkaline compounds, it is known as an alkali flat. If covered with salt, it is known... | Physical sciences | Hydrology | null |
395286 | https://en.wikipedia.org/wiki/Aizoaceae | Aizoaceae | The Aizoaceae (), or fig-marigold family, is a large family of dicotyledonous flowering plants containing 135 genera and about 1,800 species. Several genera are commonly known as 'ice plants' or 'carpet weeds'. The Aizoaceae are also referred to as vygies in South Africa. Some of the unusual Southern African genera—su... | Biology and health sciences | Caryophyllales | Plants |
395375 | https://en.wikipedia.org/wiki/Activated%20carbon | Activated carbon | Activated carbon, also called activated charcoal, is a form of carbon commonly used to filter contaminants from water and air, among many other uses. It is processed (activated) to have small, low-volume pores that greatly increase the surface area available for adsorption or chemical reactions. (Adsorption, not to b... | Physical sciences | Group 14 | Chemistry |
395846 | https://en.wikipedia.org/wiki/Mycobacterium | Mycobacterium | Mycobacterium is a genus of over 190 species in the phylum Actinomycetota, assigned its own family, Mycobacteriaceae. This genus includes pathogens known to cause serious diseases in mammals, including tuberculosis (M. tuberculosis) and leprosy (M. leprae) in humans. The Greek prefix myco- means 'fungus', alluding to t... | Biology and health sciences | Gram-positive bacteria | Plants |
396022 | https://en.wikipedia.org/wiki/Euler%20equations%20%28fluid%20dynamics%29 | Euler equations (fluid dynamics) | In fluid dynamics, the Euler equations are a set of partial differential equations governing adiabatic and inviscid flow. They are named after Leonhard Euler. In particular, they correspond to the Navier–Stokes equations with zero viscosity and zero thermal conductivity.
The Euler equations can be applied to incompres... | Physical sciences | Fluid mechanics | Physics |
396275 | https://en.wikipedia.org/wiki/Wilderness | Wilderness | Wilderness or wildlands (usually in the plural) are Earth's natural environments that have not been significantly modified by human activity, or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally referred to terrestrial environments, though growing attention is being placed o... | Physical sciences | Earth science basics: General | Earth science |
396320 | https://en.wikipedia.org/wiki/Matrix%20mechanics | Matrix mechanics | Matrix mechanics is a formulation of quantum mechanics created by Werner Heisenberg, Max Born, and Pascual Jordan in 1925. It was the first conceptually autonomous and logically consistent formulation of quantum mechanics. Its account of quantum jumps supplanted the Bohr model's electron orbits. It did so by interpreti... | Physical sciences | Quantum mechanics | Physics |
396345 | https://en.wikipedia.org/wiki/Falkland%20Islands%20wolf | Falkland Islands wolf | The Falkland Islands wolf (Dusicyon australis), also known as the warrah ( or ) and occasionally as the Falkland Islands dog, Falkland Islands fox, warrah fox, or Antarctic wolf, was the only native land mammal of the Falkland Islands. This endemic canid became extinct in 1876, the first known canid to have become ex... | Biology and health sciences | Canines | Animals |
396550 | https://en.wikipedia.org/wiki/Cargo | Cargo | In transportation, freight refers to goods conveyed by land, water or air, while cargo refers specifically to freight when conveyed via water or air. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in case of goods in the cold-chain, because the peris... | Technology | Basics_11 | null |
21035 | https://en.wikipedia.org/wiki/Migraine | Migraine | Migraine (, ) is a genetically-influenced complex neurological disorder characterized by episodes of moderate-to-severe headache, most often unilateral and generally associated with nausea and light and sound sensitivity. Other characterizing symptoms may include vomiting, cognitive dysfunction, allodynia, and dizzines... | Biology and health sciences | Non-infectious disease | null |
21061 | https://en.wikipedia.org/wiki/Mica | Mica | Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as perfect basal cleavage. Mica is common in igneous and metamorphic rock and is occasionally found as small flakes in s... | Physical sciences | Mineralogy | null |
21062 | https://en.wikipedia.org/wiki/Muscovite | Muscovite | Muscovite (also known as common mica, isinglass, or potash mica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets) which are often highly elastic. Sheets of mu... | Physical sciences | Silicate minerals | Earth science |
21113 | https://en.wikipedia.org/wiki/Napster | Napster | Napster was an American peer-to-peer (P2P) file sharing application primarily associated with digital audio file distribution. Founded by Shawn Fanning and Sean Parker, the platform originally launched on June 1, 1999. Audio shared on the service was typically encoded in the MP3 format. As the software became popular, ... | Technology | Internet | null |
21120 | https://en.wikipedia.org/wiki/Neuron | Neuron | A neuron, neurone, or nerve cell is an excitable cell that fires electric signals called action potentials across a neural network in the nervous system. They are located in the brain and spinal cord and help to receive and conduct impulses. Neurons communicate with other cells via synapses, which are specialized conne... | Biology and health sciences | Nervous system | null |
21140 | https://en.wikipedia.org/wiki/Noble%20gas | Noble gas | |-
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The noble gases (historically the inert gases, sometimes referred to as aerogens) are the members of group 18 of the periodic table: helium (He), neon (Ne), argon (Ar)... | Physical sciences | Chemical element groups | null |
21147 | https://en.wikipedia.org/wiki/Natural%20selection | Natural selection | Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with artificial ... | Biology and health sciences | Biology | null |
21170 | https://en.wikipedia.org/wiki/Numeral%20system | Numeral system | A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner.
The same sequence of symbols may represent different numbers in different numeral systems. For example, "11" represents the number... | Mathematics | Basics | null |
21175 | https://en.wikipedia.org/wiki/Nitrogen | Nitrogen | Nitrogen is a chemical element; it has symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System. At standard temperatu... | Physical sciences | Chemistry | null |
21226 | https://en.wikipedia.org/wiki/Neurology | Neurology | Neurology (from , "string, nerve" and the suffix -logia, "study of") is the branch of medicine dealing with the diagnosis and treatment of all categories of conditions and disease involving the nervous system, which comprises the brain, the spinal cord and the peripheral nerves. Neurological practice relies heavily on... | Biology and health sciences | Fields of medicine | null |
21245 | https://en.wikipedia.org/wiki/Neuroscience | Neuroscience | Neuroscience is the scientific study of the nervous system (the brain, spinal cord, and peripheral nervous system), its functions, and its disorders. It is a multidisciplinary science that combines physiology, anatomy, molecular biology, developmental biology, cytology, psychology, physics, computer science, chemistry,... | Biology and health sciences | Basics | null |
21272 | https://en.wikipedia.org/wiki/Neutron | Neutron | The neutron is a subatomic particle, symbol or , that has no electric charge, and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, they are both referred to as nucleons. Nucleons have a mass of approximat... | Physical sciences | Physics | null |
21273 | https://en.wikipedia.org/wiki/Neon | Neon | Neon is a chemical element; it has the symbol Ne and atomic number 10. It is the second noble gas in the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with approximately two-thirds the density of air.
Neon was discovered in 1898 alongside krypton and xenon, identified a... | Physical sciences | Chemical elements_2 | null |
21274 | https://en.wikipedia.org/wiki/Nickel | Nickel | Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of ni... | Physical sciences | Chemical elements_2 | null |
21275 | https://en.wikipedia.org/wiki/Niobium | Niobium | Niobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Niobium oxidizes in Earth's atmosphere very slowly, hence ... | Physical sciences | Chemical elements_2 | null |
21276 | https://en.wikipedia.org/wiki/Neodymium | Neodymium | Neodymium is a chemical element; it has symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth metals. It is a hard, slightly malleable, silvery metal that quickly tarnishes in air and moisture. When oxidized, neodymium reacts quickly producing pin... | Physical sciences | Chemical elements_2 | null |
21277 | https://en.wikipedia.org/wiki/Neptunium | Neptunium | Neptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after. A neptunium atom has 93 protons and 93 electrons, of which seven are va... | Physical sciences | Chemical elements_2 | null |
21278 | https://en.wikipedia.org/wiki/Nobelium | Nobelium | Nobelium is a synthetic chemical element; it has symbol No and atomic number 102. It is named after Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranium element, the second transfermium, and is the penultimate member of the actinide series. Like all element... | Physical sciences | Actinides | Chemistry |
21285 | https://en.wikipedia.org/wiki/Nuclear%20physics | Nuclear physics | Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter.
Nuclear physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons.
Discoveries in nuclear physics ... | Physical sciences | Nuclear physics | null |
21289 | https://en.wikipedia.org/wiki/Nautical%20mile | Nautical mile | A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. Historically, it was defined as the meridian arc length corresponding to one minute ( of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical ... | Physical sciences | Length and distance | null |
21291 | https://en.wikipedia.org/wiki/Nail%20%28fastener%29 | Nail (fastener) | In woodworking and construction, a nail is a small object made of metal (or wood, called a tree nail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration. Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available. Na... | Technology | Components_2 | null |
21435 | https://en.wikipedia.org/wiki/Nerve | Nerve | A nerve is an enclosed, cable-like bundle of nerve fibers (called axons) in the peripheral nervous system. Nerves have historically been considered the basic units of the peripheral nervous system. A nerve provides a common pathway for the electrochemical nerve impulses called action potentials that are transmitted alo... | Biology and health sciences | Nervous system | Biology |
21445 | https://en.wikipedia.org/wiki/November | November | November is the eleventh and penultimate month of the year in the Julian and Gregorian calendars. Its length is 30 days. November was the ninth month of the calendar of Romulus . November retained its name (from the Latin novem meaning "nine") when January and February were added to the Roman calendar.
November is a mo... | Technology | Months | null |
21462 | https://en.wikipedia.org/wiki/Normal%20distribution | Normal distribution | In probability theory and statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable. The general form of its probability density function is
The parameter is the mean or expectation of the distribution (and also its median and mode), ... | Mathematics | Statistics and probability | null |
21474 | https://en.wikipedia.org/wiki/Natural%20number | Natural number | In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive integers Some authors acknowledge both definitions whenever convenient. Somet... | Mathematics | Counting and numbers | null |
21476 | https://en.wikipedia.org/wiki/Natural%20logarithm | Natural logarithm | The natural logarithm of a number is its logarithm to the base of the mathematical constant , which is an irrational and transcendental number approximately equal to . The natural logarithm of is generally written as , , or sometimes, if the base is implicit, simply . Parentheses are sometimes added for clarity, giv... | Mathematics | Specific functions | null |
21477 | https://en.wikipedia.org/wiki/Neogene | Neogene | The Neogene ( ,) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period million years ago. It is the second period of the Cenozoic and the eleventh period of the Phanerozoic. The Neogene is sub-divid... | Physical sciences | Geological periods | null |
21485 | https://en.wikipedia.org/wiki/Neutrino | Neutrino | A neutrino ( ; denoted by the Greek letter ) is an elementary particle that interacts via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small (-ino) that it was long thought to be zero. The rest mass of the neutrino is much smaller than th... | Physical sciences | Fermions | null |
21488 | https://en.wikipedia.org/wiki/Nanotechnology | Nanotechnology | Nanotechnology is the manipulation of matter with at least one dimension sized from 1 to 100 nanometers (nm). At this scale, commonly known as the nanoscale, surface area and quantum mechanical effects become important in describing properties of matter. This definition of nanotechnology includes all types of research ... | Technology | Basics_5 | null |
21490 | https://en.wikipedia.org/wiki/Nylon | Nylon | Nylon is a family of synthetic polymers with amide backbones, usually linking aliphatic or semi-aromatic groups.
Nylons are white or colorless and soft; some are silk-like. They are thermoplastic, which means that they can be melt-processed into fibers, films, and diverse shapes. The properties of nylons are often mod... | Physical sciences | Carbon–nitrogen bond | null |
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