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22059223 | https://en.wikipedia.org/wiki/Limousine | Limousine | A limousine ( or ), or limo () for short, is a large, chauffeur-driven luxury vehicle with a partition between the driver compartment and the passenger compartment which can be operated mechanically by hand or by a button electronically. A luxury sedan with a very long wheelbase and driven by a professional driver is c... | Technology | Motorized road transport | null |
26416344 | https://en.wikipedia.org/wiki/Algoman%20orogeny | Algoman orogeny | The Algoman orogeny, known as the Kenoran orogeny in Canada, was an episode of mountain-building (orogeny) during the Late Archean Eon that involved repeated episodes of continental collisions, compressions and subductions. The Superior province and the Minnesota River Valley terrane collided about 2,700 to 2,500 milli... | Physical sciences | Geologic features | Earth science |
33632441 | https://en.wikipedia.org/wiki/Psychoactive%20drug | Psychoactive drug | A psychoactive drug, mind-altering drug, or consciousness-altering drug is a chemical substance that changes brain function and results in alterations in perception, mood, consciousness, cognition, or behavior. The term psychotropic drug is often used interchangeably, while some sources present narrower definitions. Th... | Biology and health sciences | General concepts_2 | Health |
28266290 | https://en.wikipedia.org/wiki/Homo%20luzonensis | Homo luzonensis | Homo luzonensis, also known as Callao Man and locally called "Ubag" after a mythical caveman, is an extinct, possibly pygmy, species of archaic human from the Late Pleistocene of Luzon, the Philippines. Their remains, teeth and phalanges, are known only from Callao Cave in the northern part of the island dating to befo... | Biology and health sciences | Homo | Biology |
49396186 | https://en.wikipedia.org/wiki/First%20observation%20of%20gravitational%20waves | First observation of gravitational waves | The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. Previously, gravitational waves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems. The waveform, detected by bot... | Physical sciences | Theory of relativity | Physics |
35258497 | https://en.wikipedia.org/wiki/Telephone%20number%20%28mathematics%29 | Telephone number (mathematics) | In mathematics, the telephone numbers or the involution numbers form a sequence of integers that count the ways people can be connected by person-to-person telephone calls. These numbers also describe the number of matchings (the Hosoya index) of a complete graph on vertices, the number of permutations on elements t... | Mathematics | Sequences | null |
46521228 | https://en.wikipedia.org/wiki/Vertebra | Vertebra | Each vertebra (: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal segment and the particular species.
The basic configuration of a vertebra ... | Biology and health sciences | Skeletal system | Biology |
29686197 | https://en.wikipedia.org/wiki/Myalgic%20encephalomyelitis/chronic%20fatigue%20syndrome | Myalgic encephalomyelitis/chronic fatigue syndrome | Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disabling chronic illness. People with ME/CFS experience profound fatigue that does not go away with rest, as well as sleep issues and problems with memory or concentration. The hallmark symptom is post-exertional malaise, a worsening of the illness which... | Biology and health sciences | Specific diseases | Health |
29692404 | https://en.wikipedia.org/wiki/Type%20II%20Cepheid | Type II Cepheid | Type II Cepheids are variable stars which pulsate with periods typically between 1 and 50 days. They are population II stars: old, typically metal-poor, low mass objects.
Like all Cepheid variables, Type IIs exhibit a relationship between the star's luminosity and pulsation period, making them useful as standard cand... | Physical sciences | Stellar astronomy | Astronomy |
25025301 | https://en.wikipedia.org/wiki/Slab%20pull | Slab pull | Slab pull is a geophysical mechanism whereby the cooling and subsequent densifying of a subducting tectonic plate produces a downward force along the rest of the plate. In 1975 Forsyth and Uyeda used the inverse theory method to show that, of the many forces likely to be driving plate motion, slab pull was the stronges... | Physical sciences | Tectonics | Earth science |
32058867 | https://en.wikipedia.org/wiki/WhatsApp | WhatsApp | WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. It allows users to send text, voice messages and video messages, make voice and video calls, and share images, documents, user locations, and other content. WhatsApp's client app... | Technology | Social network and blogging | null |
32065115 | https://en.wikipedia.org/wiki/Arab%20Mashreq%20International%20Road%20Network | Arab Mashreq International Road Network | The Arab Mashreq international Road Network is an international road network between the primarily Arab countries of the Mashriq (Syria, Iraq, Jordan, Palestine, Lebanon, Kuwait, Egypt, Saudi Arabia, Bahrain, Qatar, UAE, Oman and Yemen). In addition, part of the network passes through Israel, which is not a party to th... | Technology | Ground transportation networks | null |
40472458 | https://en.wikipedia.org/wiki/Job%20%28computing%29 | Job (computing) | In computing, a job is a unit of work or unit of execution (that performs said work). A component of a job (as a unit of work) is called a task or a step (if sequential, as in a job stream). As a unit of execution, a job may be concretely identified with a single process, which may in turn have subprocesses (child proc... | Technology | Operating systems | null |
23534209 | https://en.wikipedia.org/wiki/Environmental%20impact%20of%20agriculture | Environmental impact of agriculture | The environmental impact of agriculture is the effect that different farming practices have on the ecosystems around them, and how those effects can be traced back to those practices. The environmental impact of agriculture varies widely based on practices employed by farmers and by the scale of practice. Farming commu... | Technology | Agriculture and ecology | null |
23534602 | https://en.wikipedia.org/wiki/Human%E2%80%93computer%20interaction | Human–computer interaction | Human–computer interaction (HCI) is research in the design and the use of computer technology, which focuses on the interfaces between people (users) and computers. HCI researchers observe the ways humans interact with computers and design technologies that allow humans to interact with computers in novel ways. A devic... | Technology | Basics_4 | null |
23535218 | https://en.wikipedia.org/wiki/Industrial%20engineering | Industrial engineering | Industrial engineering is an engineering profession that is concerned with the optimization of complex processes, systems, or organizations by developing, improving and implementing integrated systems of people, money, knowledge, information and equipment. Industrial engineering is central to manufacturing operations. ... | Technology | Disciplines | null |
41910874 | https://en.wikipedia.org/wiki/Leg%20mechanism | Leg mechanism | A leg mechanism (walking mechanism) is a mechanical system designed to provide a propulsive force by intermittent frictional contact with the ground. This is in contrast with wheels or continuous tracks which are intended to maintain continuous frictional contact with the ground. Mechanical legs are linkages that can... | Technology | Machinery and tools: General | null |
25034192 | https://en.wikipedia.org/wiki/Chemical%20reaction%20engineering | Chemical reaction engineering | Chemical reaction engineering (reaction engineering or reactor engineering) is a specialty in chemical engineering or industrial chemistry dealing with chemical reactors. Frequently the term relates specifically to catalytic reaction systems where either a homogeneous or heterogeneous catalyst is present in the reacto... | Technology | Disciplines | null |
32077676 | https://en.wikipedia.org/wiki/Food%20chain | Food chain | A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice), or decomposer (such as fungi or bacteria). It is n... | Biology and health sciences | Ecology | Biology |
29719481 | https://en.wikipedia.org/wiki/Extraction%20%28chemistry%29 | Extraction (chemistry) | Extraction in chemistry is a separation process consisting of the separation of a substance from a matrix. The distribution of a solute between two phases is an equilibrium condition described by partition theory. This is based on exactly how the analyte moves from the initial solvent into the extracting solvent. The t... | Physical sciences | Other separations | Chemistry |
29722340 | https://en.wikipedia.org/wiki/Astronomical%20filter | Astronomical filter | An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to simply improve the details and contrast of celestial objects, either for viewing or for photography. Research astronomers, on the other hand, use various band-pass filters for photometry on telescopes, in orde... | Technology | Telescope | null |
23536889 | https://en.wikipedia.org/wiki/Sequoia%20sempervirens | Sequoia sempervirens | Sequoia sempervirens () is the sole living species of the genus Sequoia in the cypress family Cupressaceae (formerly treated in Taxodiaceae). Common names include coast redwood, coastal redwood and California redwood. It is an evergreen, long-lived, monoecious tree living 1,200–2,200 years or more. This species include... | Biology and health sciences | Cupressaceae | Plants |
23538713 | https://en.wikipedia.org/wiki/Bat | Bat | Bats are flying mammals of the order Chiroptera (). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out digits covered with a thin membrane or patagium. The smallest bat, and arguably... | Biology and health sciences | Bats | null |
23546532 | https://en.wikipedia.org/wiki/Cucumis%20melo | Cucumis melo | Cucumis melo, also known as melon, is a species of Cucumis that has been developed into many cultivated varieties. The fruit is a pepo. The flesh is either sweet or bland, with or without an aroma, and the rind can be smooth (such as honeydew), ribbed (such as European cantaloupe), wrinkled (such as Cassaba melon), or ... | Biology and health sciences | Cucurbitales | null |
31096097 | https://en.wikipedia.org/wiki/Monsoon%20of%20South%20Asia | Monsoon of South Asia | The Monsoon of South Asia is among several geographically distributed global monsoons. It affects the Indian subcontinent, where it is one of the oldest and most anticipated weather phenomena and an economically important pattern every year from June through September, but it is only partly understood and notoriously d... | Physical sciences | Seasons | Earth science |
36284621 | https://en.wikipedia.org/wiki/Wu%20experiment | Wu experiment | The Wu experiment was a particle and nuclear physics experiment conducted in 1956 by the Chinese American physicist Chien-Shiung Wu in collaboration with the Low Temperature Group of the US National Bureau of Standards. The experiment's purpose was to establish whether or not conservation of parity (P-conservation), wh... | Physical sciences | Quantum mechanics | Physics |
26456640 | https://en.wikipedia.org/wiki/Membrane | Membrane | A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles. Membranes can be generally classified into synthetic membranes and biological membranes. Biological membranes include cell membranes (outer coverings of cells or organ... | Physical sciences | Other separations | Chemistry |
23552434 | https://en.wikipedia.org/wiki/Ammonium%20dihydrogen%20phosphate | Ammonium dihydrogen phosphate | Ammonium dihydrogen phosphate (ADP), also known as monoammonium phosphate (MAP) is a chemical compound with the chemical formula (NH4)(H2PO4). ADP is a major ingredient of agricultural fertilizers and dry chemical fire extinguishers. It also has significant uses in optics and electronics.
Chemical properties
Monoammo... | Physical sciences | Phosphoric oxyanions | Chemistry |
23555003 | https://en.wikipedia.org/wiki/Grifola%20frondosa | Grifola frondosa | Grifola frondosa (also known as hen-of-the-woods, in Japanese, ram's head or sheep's head) is a polypore mushroom that grows at the base of trees, particularly old growth oaks or maples. It is native to China, Europe, and North America.
Description
Like the sulphur shelf mushroom, G. frondosa is a perennial fungus th... | Biology and health sciences | Edible fungi | Plants |
31109470 | https://en.wikipedia.org/wiki/Siemens%20%28unit%29 | Siemens (unit) | The siemens (symbol: S) is the unit of electric conductance, electric susceptance, and electric admittance in the International System of Units (SI). Conductance, susceptance, and admittance are the reciprocals of resistance, reactance, and impedance respectively; hence one siemens is equal to the reciprocal of one ohm... | Physical sciences | Electromagnetism | null |
40502503 | https://en.wikipedia.org/wiki/UY%20Scuti | UY Scuti | UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum. It is also a pulsating variable star, with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility. It is considered to be one of the largest known stars... | Physical sciences | Notable stars | Astronomy |
32104696 | https://en.wikipedia.org/wiki/Matoke | Matoke | Matoke, locally also known as matooke, amatooke in Buganda (Central Uganda), ekitookye in southwestern Uganda, ekitooke in western Uganda, kamatore in Lugisu (Eastern Uganda), ebitooke in northwestern Tanzania, igitoki in Rwanda, Burundi and by the cultivar name East African Highland banana, are a group of starchy trip... | Biology and health sciences | Tropical and tropical-like fruit | Plants |
26465940 | https://en.wikipedia.org/wiki/Herpes%20esophagitis | Herpes esophagitis | Herpes esophagitis is a viral infection of the esophagus caused by Herpes simplex virus (HSV).
While the disease most often occurs in immunocompromised patients, including post-chemotherapy, immunosuppression with organ transplants and in AIDS, herpes esophagitis can also occur in immunocompetent individuals.
Signs a... | Biology and health sciences | Viral diseases | Health |
25067088 | https://en.wikipedia.org/wiki/Soldering | Soldering | Soldering (; ) is a process of joining two metal surfaces together using a filler metal called solder. The soldering process involves heating the surfaces to be joined and melting the solder, which is then allowed to cool and solidify, creating a strong and durable joint.
Soldering is commonly used in the electronics ... | Technology | Metallurgy | null |
33704019 | https://en.wikipedia.org/wiki/Jameson%27s%20mamba | Jameson's mamba | Jameson's mamba (Dendroaspis jamesoni) is a species of highly venomous snake in the family Elapidae. The species is native to equatorial Africa. A member of the mamba genus, Dendroaspis, it is slender with dull green upper parts and cream underparts and generally ranges from in total length. Described by Scottish natu... | Biology and health sciences | Snakes | Animals |
40516793 | https://en.wikipedia.org/wiki/Colored%20pencil | Colored pencil | A colored pencil (American English), coloured pencil (Commonwealth English), colour pencil (Indian English), map pencil, pencil crayon, or coloured/colouring lead (Canadian English, Newfoundland English) is a type of pencil constructed of a narrow, pigmented core encased in a wooden cylindrical case. Unlike graphite a... | Technology | Artist's and drafting tools | null |
23568658 | https://en.wikipedia.org/wiki/Radioanalytical%20chemistry | Radioanalytical chemistry | Radioanalytical chemistry focuses on the analysis of sample for their radionuclide content. Various methods are employed to purify and identify the radioelement of interest through chemical methods and sample measurement techniques.
History
The field of radioanalytical chemistry was originally developed by Marie C... | Physical sciences | Basics_2 | Chemistry |
35319154 | https://en.wikipedia.org/wiki/Occupational%20safety%20and%20health | Occupational safety and health | Occupational safety and health (OSH) or occupational health and safety (OHS) is a multidisciplinary field concerned with the safety, health, and welfare of people at work (i.e., while performing duties required by one's occupation). OSH is related to the fields of occupational medicine and occupational hygiene and alig... | Biology and health sciences | Health and fitness | null |
35323072 | https://en.wikipedia.org/wiki/Yutyrannus | Yutyrannus | Yutyrannus (Simplified Chinese : 华丽羽王龙 Traditional Chinese : 華麗羽王龍 Pinyin : Huà Lì Yǔ Wáng Lóng meaning "feathered tyrant") is a genus of proceratosaurid tyrannosauroid dinosaur which contains a single known species, Yutyrannus huali. This species lived during the early Cretaceous period in what is now northeastern Chi... | Biology and health sciences | Theropods | Animals |
26477290 | https://en.wikipedia.org/wiki/Substance%20use%20disorder | Substance use disorder | Substance use disorder (SUD) is the persistent use of drugs despite substantial harm and adverse consequences to self and others. Related terms include substance use problems and problematic drug or alcohol use.
Substance use disorders vary with regard to the average age of onset. It is not uncommon for those who ha... | Biology and health sciences | Drugs and pharmacology | null |
25086118 | https://en.wikipedia.org/wiki/Autotroph | Autotroph | An autotroph is an organism that can convert abiotic sources of energy into energy stored in organic compounds, which can be used by other organisms. Autotrophs produce complex organic compounds (such as carbohydrates, fats, and proteins) using carbon from simple substances such as carbon dioxide, generally using ener... | Biology and health sciences | Ecology | Biology |
28329803 | https://en.wikipedia.org/wiki/Spider | Spider | Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every cont... | Biology and health sciences | Arachnids | null |
28331736 | https://en.wikipedia.org/wiki/Prunus%20avium | Prunus avium | Prunus avium, commonly called wild cherry, sweet cherry or gean is a species of cherry, a flowering plant in the rose family, Rosaceae. It is native to Europe, Anatolia, Maghreb, and Western Asia, from the British Isles south to Morocco and Tunisia, north to the Trondheimsfjord region in Norway and east to the Caucasu... | Biology and health sciences | Stone fruits | Plants |
28332898 | https://en.wikipedia.org/wiki/Hyrax | Hyrax | Hyraxes (from Ancient Greek 'shrew-mouse'), also called dassies,
are small, stout, thickset, herbivorous mammals in the family Procaviidae within the order Hyracoidea. Hyraxes are well-furred, rotund animals with short tails. Modern hyraxes are typically between in length and weigh between . They are superficially s... | Biology and health sciences | Mammals | null |
46583121 | https://en.wikipedia.org/wiki/Existential%20risk%20from%20artificial%20intelligence | Existential risk from artificial intelligence | Existential risk from artificial intelligence refers to the idea that substantial progress in artificial general intelligence (AGI) could lead to human extinction or an irreversible global catastrophe.
One argument for the importance of this risk references how human beings dominate other species because the human bra... | Technology | Artificial intelligence concepts | null |
37785528 | https://en.wikipedia.org/wiki/Saturn%27s%20hexagon | Saturn's hexagon | Saturn's hexagon is a persistent approximately hexagonal cloud pattern around the north pole of the planet Saturn, located at about 78°N.
The sides of the hexagon are about long, which is about longer than the diameter of Earth. The hexagon may be a bit more than wide, may be high, and may be a jet stream made of a... | Physical sciences | Solar System | Astronomy |
40533280 | https://en.wikipedia.org/wiki/Amiatina | Amiatina | The Amiatina or is a breed of donkey from Tuscany in central Italy. It is particularly associated with Monte Amiata in the provinces of Siena and Grosseto, but is distributed throughout Tuscany. There are also populations in Liguria and in Campania. It is one of the eight autochthonous donkey breeds of limited distrib... | Biology and health sciences | Donkeys | Animals |
33710707 | https://en.wikipedia.org/wiki/Planck%20units | Planck units | In particle physics and physical cosmology, Planck units are a system of units of measurement defined exclusively in terms of four universal physical constants: c, G, ħ, and kB (described further below). Expressing one of these physical constants in terms of Planck units yields a numerical value of 1. They are a system... | Physical sciences | Measurement: General | null |
33710742 | https://en.wikipedia.org/wiki/Natural%20units | Natural units | In physics, natural unit systems are measurement systems for which selected physical constants have been set to 1 through nondimensionalization of physical units. For example, the speed of light may be set to 1, and it may then be omitted, equating mass and energy directly rather than using as a conversion factor in... | Physical sciences | Measurement: General | null |
48217770 | https://en.wikipedia.org/wiki/Tabby%27s%20Star | Tabby's Star | Tabby's Star (designated as KIC 8462852 in the Kepler Input Catalog and also known by the names Boyajian's Star and WTF (Where'sTheFlux?) Star, is a binary star in the constellation Cygnus approximately from Earth. The system is composed of an F-type main-sequence star and a red dwarf companion.
Unusual light fluctua... | Physical sciences | Notable stars | Astronomy |
25095376 | https://en.wikipedia.org/wiki/Entorrhizomycetes | Entorrhizomycetes | Entorrhizomycetes is the sole class in the phylum Entorrhizomycota, within the Fungi subkingdom Dikarya along with Basidiomycota and Ascomycota. It contains three genera and is a small group of teliosporic root parasites that form galls on plants in the Juncaceae (rush) and Cyperaceae (sedge) families. Prior to 2015 th... | Biology and health sciences | Basics | Plants |
25101402 | https://en.wikipedia.org/wiki/Astrophysical%20X-ray%20source | Astrophysical X-ray source | Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.
Several types of astrophysical objects emit X-rays. They include galaxy clusters, black holes in active galactic nuclei (AGN), galactic objects such as supernova remnants, stars, and binary stars conta... | Physical sciences | High-energy astronomy | Astronomy |
28338635 | https://en.wikipedia.org/wiki/Command-line%20interface | Command-line interface | A command-line interface (CLI) is a means of interacting with a computer program by inputting lines of text called command lines. Command-line interfaces emerged in the mid-1960s, on computer terminals, as an interactive and more user-friendly alternative to the non-interactive mode available with punched cards.
Today... | Technology | User interface | null |
41969475 | https://en.wikipedia.org/wiki/Reticulated%20giraffe | Reticulated giraffe | The reticulated giraffe (Giraffa reticulata or Giraffa camelopardalis reticulata) is a species/subspecies of giraffe native to the Horn of Africa. It is differentiated from other types of giraffe by its coat, which consists of large, polygonal (or squared), block-like spots, which extend onto the lower legs, tail and f... | Biology and health sciences | Giraffidae | Animals |
33731380 | https://en.wikipedia.org/wiki/Dassault%20Rafale | Dassault Rafale | The Dassault Rafale (, literally meaning "gust of wind", or "burst of fire" in a more military sense) is a French twin-engine, canard delta wing, multirole fighter aircraft designed and built by Dassault Aviation. Equipped with a wide range of weapons, the Rafale is intended to perform air supremacy, interdiction, aeri... | Technology | Specific aircraft | null |
33731493 | https://en.wikipedia.org/wiki/Parallel%20postulate | Parallel postulate | In geometry, the parallel postulate, also called Euclid's fifth postulate because it is the fifth postulate in Euclid's Elements, is a distinctive axiom in Euclidean geometry. It states that, in two-dimensional geometry:
If a line segment intersects two straight lines forming two interior angles on the same side that ... | Mathematics | Euclidean geometry | null |
43440252 | https://en.wikipedia.org/wiki/Digital%20buffer | Digital buffer | A digital buffer (or a logic buffer) is an electronic circuit element used to copy a digital input signal and isolate it from any output load. For the typical case of using voltages as logic signals, a logic buffer's input impedance is high, so it draws little current from the input circuit, to avoid disturbing its sig... | Technology | Digital logic | null |
26513034 | https://en.wikipedia.org/wiki/Pythagorean%20theorem | Pythagorean theorem | In mathematics, the Pythagorean theorem or Pythagoras' theorem is a fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other ... | Mathematics | Geometry | null |
31156672 | https://en.wikipedia.org/wiki/Supermoon | Supermoon | A supermoon is a full moon or a new moon that nearly coincides with perigee—the closest that the Moon comes to the Earth in its orbit—resulting in a slightly larger-than-usual apparent size of the lunar disk as viewed from Earth. The technical name is a perigee syzygy (of the Earth–Moon–Sun system) or a full (or new) M... | Physical sciences | Celestial mechanics | Astronomy |
25110709 | https://en.wikipedia.org/wiki/Nuclear%20magnetic%20resonance | Nuclear magnetic resonance | Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are disturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This process occur... | Physical sciences | Nuclear physics | Physics |
25111839 | https://en.wikipedia.org/wiki/Overexploitation | Overexploitation | Overexploitation, also called overharvesting or ecological overshoot, refers to harvesting a renewable resource to the point of diminishing returns. Continued overexploitation can lead to the destruction of the resource, as it will be unable to replenish. The term applies to natural resources such as water aquifers, g... | Physical sciences | Earth science basics: General | Earth science |
45266571 | https://en.wikipedia.org/wiki/Laboratory%20safety | Laboratory safety | Many laboratories contain significant risks, and the prevention of laboratory accidents requires great care and constant vigilance. Examples of risk factors include high voltages, high and low pressures and temperatures, corrosive and toxic chemicals and chemical vapours, radiation, fire, explosions, and biohazards inc... | Physical sciences | Research methods | Basics and measurement |
25119018 | https://en.wikipedia.org/wiki/Plaice | Plaice | Plaice is a common name for a group of flatfish that comprises four species: the European, American, Alaskan and scale-eye plaice.
Commercially, the most important plaice is the European. The principal commercial flatfish in Europe, it is also widely fished recreationally, has potential as an aquaculture species, and ... | Biology and health sciences | Acanthomorpha | null |
25122906 | https://en.wikipedia.org/wiki/Home%20computer | Home computer | Home computers were a class of microcomputers that entered the market in 1977 and became common during the 1980s. They were marketed to consumers as affordable and accessible computers that, for the first time, were intended for the use of a single, non-technical user. These computers were a distinct market segment tha... | Technology | Computer hardware | null |
31167376 | https://en.wikipedia.org/wiki/Poposauroidea | Poposauroidea | Poposauroidea is a clade of advanced pseudosuchians. It includes poposaurids, shuvosaurids, ctenosauriscids, and other unusual pseudosuchians such as Qianosuchus and Lotosaurus. It excludes most large predatory quadrupedal "rauisuchians" such as rauisuchids and "prestosuchids". Those reptiles are now allied with crocod... | Biology and health sciences | Other prehistoric archosaurs | Animals |
32154505 | https://en.wikipedia.org/wiki/Drylands | Drylands | Drylands are defined by a scarcity of water. Drylands are zones where precipitation is balanced by evaporation from surfaces and by transpiration by plants (evapotranspiration). The United Nations Environment Program defines drylands as tropical and temperate areas with an aridity index of less than 0.65. One can class... | Physical sciences | Biomes: General | Earth science |
32159470 | https://en.wikipedia.org/wiki/Reboot | Reboot | In computing, rebooting is the process by which a running computer system is restarted, either intentionally or unintentionally. Reboots can be either a cold reboot (alternatively known as a hard reboot) in which the power to the system is physically turned off and back on again (causing an initial boot of the machine... | Technology | Computer hardware | null |
29828324 | https://en.wikipedia.org/wiki/Classical%20Cepheid%20variable | Classical Cepheid variable | Classical Cepheids are a type of Cepheid variable star. They are young, population I variable stars that exhibit regular radial pulsations with periods of a few days to a few weeks and visual amplitudes ranging from a few tenths of a magnitude up to about 2 magnitudes. Classical Cepheids are also known as Population I ... | Physical sciences | Stellar astronomy | Astronomy |
36354724 | https://en.wikipedia.org/wiki/Line%20%28software%29 | Line (software) | Line is a freeware app and service for instant messaging and social networking, operated by the Japanese company LY Corporation, co-owned by SoftBank Group. Line was launched in Japan in June 2011 by NHN Japan, a subsidiary of Naver.
Initially designed for text messaging and VoIP voice and video calling, it has gradua... | Technology | Social network and blogging | null |
26534334 | https://en.wikipedia.org/wiki/Anorexia%20nervosa | Anorexia nervosa | Anorexia nervosa (AN), often referred to simply as anorexia, is an eating disorder characterized by food restriction, body image disturbance, fear of gaining weight, and an overpowering desire to be thin.
Individuals with anorexia nervosa have a fear of being overweight or being seen as such, despite the fact that the... | Biology and health sciences | Mental disorders | Health |
37824359 | https://en.wikipedia.org/wiki/Evolution%20of%20fish | Evolution of fish | The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Hai... | Biology and health sciences | Basics_4 | Biology |
45294967 | https://en.wikipedia.org/wiki/Penghu%201 | Penghu 1 | Penghu 1 is a fossil jaw (mandible) belonging to an extinct hominin species of the genus Homo. It was collected from seafloor sediments of the Penghu Channel off the coast of Taiwan, dating to sometime in the Middle Pleistocene or Late Pleistocene. The precise classification of the mandible is disputed. Some believe it... | Biology and health sciences | Homo | Biology |
45298242 | https://en.wikipedia.org/wiki/Manot%201 | Manot 1 | Manot 1 is a fossil specimen designated to a skullcap that represents an archaic modern human discovered in Manot Cave, Western Galilee, Israel.
It was discovered in 2008 and the scientific description was published in 2015. Radiometric dating indicates that it is about 54,700 years old (the late Mousterian), and th... | Biology and health sciences | Homo | Biology |
35442274 | https://en.wikipedia.org/wiki/Dorcatherium | Dorcatherium | Dorcatherium is an extinct genus of tragulid ruminant which existed in Europe, East Africa and the Siwaliks during the Miocene and Possibly Pliocene .
| Biology and health sciences | Other artiodactyla | Animals |
25139347 | https://en.wikipedia.org/wiki/Kaprosuchus | Kaprosuchus | Kaprosuchus is an extinct genus of mahajangasuchid crocodyliform. It is known from a single nearly complete skull collected from the Upper Cretaceous Echkar Formation of Niger. The name means "boar crocodile" from the Greek , kapros ("boar") and , soukhos ("crocodile") in reference to its unusually large caniniform tee... | Biology and health sciences | Prehistoric crocodiles | Animals |
26547932 | https://en.wikipedia.org/wiki/Ordinal%20number | Ordinal number | In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals (first, second, th, etc.) aimed to extend enumeration to infinite sets.
A finite set can be enumerated by successively labeling each element with the least natural number that has not been previously used. To extend this process to v... | Mathematics | Set theory | null |
26551602 | https://en.wikipedia.org/wiki/Limit%20%28mathematics%29 | Limit (mathematics) | In mathematics, a limit is the value that a function (or sequence) approaches as the argument (or index) approaches some value. Limits of functions are essential to calculus and mathematical analysis, and are used to define continuity, derivatives, and integrals.
The concept of a limit of a sequence is further generali... | Mathematics | Analysis | null |
26555929 | https://en.wikipedia.org/wiki/Harbor%20seal | Harbor seal | The harbor (or harbour) seal (Phoca vitulina), also known as the common seal, is a true seal found along temperate and Arctic marine coastlines of the Northern Hemisphere. The most widely distributed species of pinniped (walruses, eared seals, and true seals), they are found in coastal waters of the northern Atlantic a... | Biology and health sciences | Pinnipeds | Animals |
32177451 | https://en.wikipedia.org/wiki/Function%20%28computer%20programming%29 | Function (computer programming) | In computer programming, a function (also procedure, method, subroutine, routine, or subprogram) is a callable unit of software logic that has a well-defined interface and behavior and can be invoked multiple times.
Callable units provide a powerful programming tool. The primary purpose is to allow for the decompositi... | Technology | Software development: General | null |
33775893 | https://en.wikipedia.org/wiki/Rainfed%20agriculture | Rainfed agriculture | Rainfed agriculture is a type of farming that relies on rainfall for water. It provides much of the food consumed by poor communities in developing countries. E.g., rainfed agriculture accounts for more than 95% of farmed land in sub-Saharan Africa, 90% in Latin America, 75% in the Near East and North Africa, 65% in Ea... | Technology | Agriculture_2 | null |
45311025 | https://en.wikipedia.org/wiki/Spectrometer | Spectrometer | A spectrometer () is a scientific instrument used to separate and measure spectral components of a physical phenomenon. Spectrometer is a broad term often used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed. In visible light a spectrometer can ... | Technology | Measuring instruments | null |
35456546 | https://en.wikipedia.org/wiki/Ricci%20calculus | Ricci calculus | In mathematics, Ricci calculus constitutes the rules of index notation and manipulation for tensors and tensor fields on a differentiable manifold, with or without a metric tensor or connection. It is also the modern name for what used to be called the absolute differential calculus (the foundation of tensor calculus)... | Mathematics | Multivariable and vector calculus | null |
35458904 | https://en.wikipedia.org/wiki/Data%20science | Data science | Data science is an interdisciplinary academic field that uses statistics, scientific computing, scientific methods, processing, scientific visualization, algorithms and systems to extract or extrapolate knowledge and insights from potentially noisy, structured, or unstructured data.
Data science also integrates domai... | Physical sciences | Science basics | Basics and measurement |
52134207 | https://en.wikipedia.org/wiki/Stone%20slab | Stone slab | A stone slab is a big stone, flat and relatively thin, often of rectangular or almost rectangular form. They are generally used for paving floors, for covering walls or as headstones.
In dolmens
Most dolmen constructions were built using stone slabs of big dimensions. Their architecture often includes a corridor of a... | Technology | Building materials | null |
25154546 | https://en.wikipedia.org/wiki/Mechanical%20filter | Mechanical filter | A mechanical filter is a signal processing filter usually used in place of an electronic filter at radio frequencies. Its purpose is the same as that of a normal electronic filter: to pass a range of signal frequencies, but to block others. The filter acts on mechanical vibrations which are the analogue of the electr... | Technology | Signal processing | null |
25156868 | https://en.wikipedia.org/wiki/Stomatosuchidae | Stomatosuchidae | Stomatosuchidae is an extinct family of neosuchian crocodylomorphs. It is defined as the most inclusive clade containing Stomatosuchus inermis but not Notosuchus terrestris, Simosuchus clarki, Araripesuchus gomesii, Baurusuchus pachecoi, Peirosaurus torminni, or Crocodylus niloticus. Two genera are known to belong to S... | Biology and health sciences | Prehistoric crocodiles | Animals |
32186638 | https://en.wikipedia.org/wiki/Flip-flop%20%28electronics%29 | Flip-flop (electronics) | In electronics, flip-flops and latches are circuits that have two stable states that can store state information – a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control inputs and will output its state (often along with its logical complement too). It is the basic s... | Technology | Digital logic | null |
42029762 | https://en.wikipedia.org/wiki/Deafness | Deafness | Deafness has varying definitions in cultural and medical contexts. In medical contexts, the meaning of deafness is hearing loss that precludes a person from understanding spoken language, an audiological condition. In this context it is written with a lower case d. It later came to be used in a cultural context to refe... | Biology and health sciences | Disabilities | Health |
39304988 | https://en.wikipedia.org/wiki/Time-domain%20astronomy | Time-domain astronomy | Time-domain astronomy is the study of how astronomical objects change with time. Said to have begun with Galileo's Letters on Sunspots, the field has now naturally expanded to encompass variable objects beyond the Solar System. Temporal variation may originate from movement of the source, or changes in the object itsel... | Physical sciences | Astronomy basics | Astronomy |
49557688 | https://en.wikipedia.org/wiki/Effects%20of%20climate%20change%20on%20small%20island%20countries | Effects of climate change on small island countries | The effects of climate change on small island countries are affecting people in coastal areas through sea level rise, increasing heavy rain events, tropical cyclones and storm surges. These effects of climate change threaten the existence of many island countries, their peoples and cultures. They also alter ecosystems ... | Physical sciences | Climate change | Earth science |
25160767 | https://en.wikipedia.org/wiki/Livestock | Livestock | Livestock are the domesticated animals raised in an agricultural setting in order to provide labour and produce diversified products for consumption such as meat, eggs, milk, fur, leather, and wool. The term is sometimes used to refer solely to animals who are raised for consumption, and sometimes used to refer solely ... | Technology | Animal husbandry | null |
25164088 | https://en.wikipedia.org/wiki/Kleptothermy | Kleptothermy | In biology, kleptothermy is any form of thermoregulation by which an animal shares in the metabolic thermogenesis of another animal. It may or may not be reciprocal, and occurs in both endotherms and ectotherms. One of its forms is huddling. However, kleptothermy can happen between different species that share the same... | Biology and health sciences | Basics | Biology |
25164668 | https://en.wikipedia.org/wiki/White%20blood%20cell | White blood cell | White blood cells (scientific name leukocytes), also called immune cells or immunocytes, are cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. White blood cells are generally larger than red blood cells. They include three main subtypes: granulocyt... | Biology and health sciences | Circulatory system | null |
25164793 | https://en.wikipedia.org/wiki/Seed%20plant | Seed plant | A seed plant or spermatophyte (; ), also known as a phanerogam (taxon Phanerogamae) or a phaenogam (taxon Phaenogamae), is any plant that produces seeds. It is a category of embryophyte (i.e. land plant) that includes most of the familiar land plants, including the flowering plants and the gymnosperms, but not ferns, m... | Biology and health sciences | Seed plants (except flowering plants) | Plants |
33816021 | https://en.wikipedia.org/wiki/Danionin | Danionin | The danionins are a group of small, minnow-type fish belonging to the family Cyprinidae. Species of this group are in the genera clades Danio and Devario (which also includes Chela, Laubuka, Microdevario, and Microrasbora genera), based on the latest phylo-genetic research by Fang et al in 2009. They are primarily nati... | Biology and health sciences | Cypriniformes | Animals |
43507260 | https://en.wikipedia.org/wiki/Quantifier%20%28logic%29 | Quantifier (logic) | In logic, a quantifier is an operator that specifies how many individuals in the domain of discourse satisfy an open formula. For instance, the universal quantifier in the first order formula expresses that everything in the domain satisfies the property denoted by . On the other hand, the existential quantifier in ... | Mathematics | Mathematical logic | null |
46659847 | https://en.wikipedia.org/wiki/Heavy%20metals | Heavy metals | Heavy metals is a controversial and ambiguous term for metallic elements with relatively high densities, atomic weights, or atomic numbers. The criteria used, and whether metalloids are included, vary depending on the author and context and has been argued should not be used. A heavy metal may be defined on the basis o... | Physical sciences | Periodic table | Chemistry |
26594247 | https://en.wikipedia.org/wiki/Internal%20pressure | Internal pressure | Internal pressure is a measure of how the internal energy of a system changes when it expands or contracts at constant temperature. It has the same dimensions as pressure, the SI unit of which is the pascal.
Internal pressure is usually given the symbol . It is defined as a partial derivative of internal energy with ... | Physical sciences | Thermodynamics | Physics |
26595097 | https://en.wikipedia.org/wiki/Main%20battle%20tank | Main battle tank | A main battle tank (MBT), also known as a battle tank or universal tank or simply tank, is a tank that fills the role of armour-protected direct fire and maneuver in many modern armies. Cold War-era development of more powerful engines, better suspension systems and lighter composite armour allowed for the design of a ... | Technology | Maneuver | null |
39308394 | https://en.wikipedia.org/wiki/Galactic%20habitable%20zone | Galactic habitable zone | In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life is most likely to develop. The concept of a galactic habitable zone analyzes various factors, such as metallicity (the presence of elements heavier than hydrogen and helium) and the rate and density of major ... | Physical sciences | Planetary science | Astronomy |
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