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1819013 | https://en.wikipedia.org/wiki/Ravenala | Ravenala | Ravenala is a genus of monocotyledonous flowering plants. Classically, the genus was considered to include a single species, Ravenala madagascariensis from Madagascar.
Taxonomy
Species of the genus Ravenala are not true palms (family Arecaceae) but members of the family Strelitziaceae. The genus is closely related to ... | Biology and health sciences | Zingiberales | Plants |
1819866 | https://en.wikipedia.org/wiki/Mangabey | Mangabey | Mangabeys are West African Old World monkeys, with species in three of the six genera of tribe Papionini.
The more typical representatives of Cercocebus, also known as the white-eyelid mangabeys, are characterized by their bare, upper eyelids, which are lighter than their facial skin colouring, and the uniformly colo... | Biology and health sciences | Old World monkeys | Animals |
1820047 | https://en.wikipedia.org/wiki/Dysgenics | Dysgenics | Dysgenics refers to any decrease in the prevalence of traits deemed to be either socially desirable or generally adaptive to their environment due to selective pressure disfavouring their reproduction.
In 1915 the term was used by David Starr Jordan to describe the supposed deleterious effects of modern warfare on gr... | Biology and health sciences | Genetics | Biology |
2515655 | https://en.wikipedia.org/wiki/DisplayPort | DisplayPort | DisplayPort (DP) is a proprietary digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). It is primarily used to connect a video source to a display device such as a computer monitor. It can also carry audio, USB, and othe... | Technology | User interface | null |
2517809 | https://en.wikipedia.org/wiki/Arsenide%20mineral | Arsenide mineral | An arsenide mineral is a mineral that contains arsenide as its main anion. Arsenides are grouped with the sulfides in both the Dana and Strunz mineral classification systems.
Examples
algodonite
domeykite
löllingite
nickeline
rammelsbergite
safflorite
skutterudite
sperrylite
| Physical sciences | Minerals | Earth science |
2518423 | https://en.wikipedia.org/wiki/Eusthenopteron | Eusthenopteron | Eusthenopteron (from , 'good', , 'strength', and 'wing' or 'fin') is a genus of prehistoric sarcopterygian (often called "lobe-finned") fish known from several species that lived during the Late Devonian period, about 385 million years ago. It has attained an iconic status from its close relationship to tetrapods. ... | Biology and health sciences | Prehistoric osteichthyans | Animals |
2520434 | https://en.wikipedia.org/wiki/Beneficial%20organism | Beneficial organism | In agriculture and gardening, a beneficial organism is any organism that benefits the growing process, including insects, arachnids, other animals, plants, bacteria, fungi, viruses, and nematodes. Benefits include pest control, pollination, and maintenance of soil health. The opposite of beneficial organisms are pests,... | Technology | Soil and soil management | null |
20617690 | https://en.wikipedia.org/wiki/Super%20grid | Super grid | A super grid or supergrid is a wide-area transmission network, generally trans-continental or multinational, that is intended to make possible the trade of high volumes of electricity across great distances. It is sometimes also referred to as a "mega grid". Super grids typically are proposed to use high-voltage direct... | Technology | Electricity transmission and distribution | null |
22121709 | https://en.wikipedia.org/wiki/Monotreme | Monotreme | Monotremes () are mammals of the order Monotremata. They are the only group of living mammals that lay eggs, rather than bearing live young. The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences in their brains, jaws, digestive tract, reproduct... | Biology and health sciences | Monotremes | null |
10398668 | https://en.wikipedia.org/wiki/Acacia%20decurrens | Acacia decurrens | Acacia decurrens, commonly known as black wattle or early green wattle, is a perennial tree or shrub native to eastern New South Wales, including Sydney, the Greater Blue Mountains Area, the Hunter Region, and southwest to the Australian Capital Territory. It grows to a height of 2–15 m (7–50 ft) and it flowers from Ju... | Biology and health sciences | Fabales | Plants |
12699214 | https://en.wikipedia.org/wiki/Cretaceous%E2%80%93Paleogene%20boundary | Cretaceous–Paleogene boundary | The Cretaceous–Paleogene (K–Pg) boundary, formerly known as the Cretaceous–Tertiary (K–T) boundary, is a geological signature, usually a thin band of rock containing much more iridium than other bands. The K–Pg boundary marks the end of the Cretaceous Period, the last period of the Mesozoic Era, and marks the beginning... | Physical sciences | Geologic features | Earth science |
1211986 | https://en.wikipedia.org/wiki/Virtual%20work | Virtual work | In mechanics, virtual work arises in the application of the principle of least action to the study of forces and movement of a mechanical system. The work of a force acting on a particle as it moves along a displacement is different for different displacements. Among all the possible displacements that a particle may... | Physical sciences | Classical mechanics | Physics |
1212681 | https://en.wikipedia.org/wiki/Gang-gang%20cockatoo | Gang-gang cockatoo | The gang-gang cockatoo (Callocephalon fimbriatum) is a parrot found in the cooler and wetter forests and woodlands of Australia, particularly alpine bushland. It is the only species placed in the genus Callocephalon. Mostly mild grey in colour with some lighter scalloping (more pronounced and buffy in females), the mal... | Biology and health sciences | Psittaciformes | Animals |
1213846 | https://en.wikipedia.org/wiki/Sodium%20borohydride | Sodium borohydride | Sodium borohydride, also known as sodium tetrahydridoborate and sodium tetrahydroborate, is an inorganic compound with the formula (sometimes written as ). It is a white crystalline solid, usually encountered as an aqueous basic solution. Sodium borohydride is a reducing agent that finds application in papermaking and... | Physical sciences | Borohydride salts | Chemistry |
1214539 | https://en.wikipedia.org/wiki/Feathered%20dinosaur | Feathered dinosaur | A feathered dinosaur is any species of dinosaur possessing feathers. That includes all species of birds, and in recent decades evidence has accumulated that many non-avian dinosaur species also possessed feathers in some shape or form. The extent to which feathers or feather-like structures were present in dinosaurs as... | Biology and health sciences | Dinosaurs | Animals |
8035060 | https://en.wikipedia.org/wiki/Ecosystem%20model | Ecosystem model | An ecosystem model is an abstract, usually mathematical, representation of an ecological system (ranging in scale from an individual population, to an ecological community, or even an entire biome), which is studied to better understand the real system.
Using data gathered from the field, ecological relationships—such... | Biology and health sciences | Ecology | Biology |
8040039 | https://en.wikipedia.org/wiki/Vault%20%28architecture%29 | Vault (architecture) | In architecture, a vault (French voûte, from Italian volta) is a self-supporting arched form, usually of stone or brick, serving to cover a space with a ceiling or roof. As in building an arch, a temporary support is needed while rings of voussoirs are constructed and the rings placed in position. Until the topmost vou... | Technology | Architectural elements | null |
6110795 | https://en.wikipedia.org/wiki/Passive%20cooling | Passive cooling | Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption. This approach works either by preventing heat from entering the interior (heat gain prevention) or by removing heat from th... | Technology | Heating and cooling | null |
6115906 | https://en.wikipedia.org/wiki/Super%20star%20cluster | Super star cluster | A super star cluster (SSC) is a very massive young open cluster that is thought to be the precursor of a globular cluster. These clusters called "super" because they are relatively more luminous and contain more mass than other young star clusters. The SSC, however, does not have to physically be larger than other clu... | Physical sciences | Stellar astronomy | Astronomy |
3461736 | https://en.wikipedia.org/wiki/Data%20and%20information%20visualization | Data and information visualization | Data and information visualization (data viz/vis or info viz/vis) is the practice of designing and creating easy-to-communicate and easy-to-understand graphic or visual representations of a large amount of complex quantitative and qualitative data and information with the help of static, dynamic or interactive visual i... | Mathematics | Statistics and probability | null |
3464219 | https://en.wikipedia.org/wiki/Medical%20genetics | Medical genetics | Medical genetics is the branch of medicine that involves the diagnosis and management of hereditary disorders. Medical genetics differs from human genetics in that human genetics is a field of scientific research that may or may not apply to medicine, while medical genetics refers to the application of genetics to medi... | Biology and health sciences | Fields of medicine | Health |
3464580 | https://en.wikipedia.org/wiki/Vein%20%28geology%29 | Vein (geology) | In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation.
Veins are classically thought of... | Physical sciences | Structural geology | Earth science |
3465676 | https://en.wikipedia.org/wiki/Fluoroantimonic%20acid | Fluoroantimonic acid | Fluoroantimonic acid is a mixture of hydrogen fluoride and antimony pentafluoride, containing various cations and anions (the simplest being and ). This mixture is a superacid that, in terms of corrosiveness, is trillions of times stronger than pure sulfuric acid when measured by its Hammett acidity function. It even ... | Physical sciences | Specific acids | Chemistry |
3468246 | https://en.wikipedia.org/wiki/Vaccinium%20myrtillus | Vaccinium myrtillus | Vaccinium myrtillus or European blueberry is a holarctic species of shrub with edible fruit of blue color, known by the common names bilberry, blaeberry, wimberry, and whortleberry. It is more precisely called common bilberry or blue whortleberry to distinguish it from other Vaccinium relatives.
Description
Vaccinium... | Biology and health sciences | Berries | Plants |
19444970 | https://en.wikipedia.org/wiki/Dark%20flow | Dark flow | In astrophysics, dark flow is a controversial hypothesis to explain certain non-random measurements of peculiar velocity of galaxy clusters. The actual measured velocity is the sum of the velocity predicted by Hubble's law plus a possible small velocity flowing in a common direction. Very large scale correlated flow, c... | Physical sciences | Basics_2 | Astronomy |
19452043 | https://en.wikipedia.org/wiki/Health%20facility | Health facility | A health facility is, in general, any location where healthcare is provided. Health facilities range from small clinics and doctor's offices to urgent care centers and large hospitals with elaborate emergency rooms and trauma centers. The number and quality of health facilities in a country or region is one common meas... | Biology and health sciences | Health facilities | Health |
4664479 | https://en.wikipedia.org/wiki/Corypha%20umbraculifera | Corypha umbraculifera | Corypha umbraculifera, the talipot palm, is a species of palm native to eastern and southern India and Sri Lanka. It is also grown in Cambodia, Myanmar, Thailand, Mauritius and the Andaman Islands. It is one of the five accepted species in the genus Corypha. It is a flowering plant with the largest inflorescence in the... | Biology and health sciences | Arecales (inc. Palms) | Plants |
4664489 | https://en.wikipedia.org/wiki/Coprinus%20comatus | Coprinus comatus | Coprinus comatus, commonly known as the shaggy ink cap, lawyer's wig, or shaggy mane, is a common fungus often seen growing on lawns, along gravel roads and waste areas. The young fruit bodies first appear as white cylinders emerging from the ground, then the bell-shaped caps open out. The caps are white, and covered w... | Biology and health sciences | Edible fungi | Plants |
4665849 | https://en.wikipedia.org/wiki/Silver%20azide | Silver azide | Silver azide is the chemical compound with the formula . It is a silver(I) salt of hydrazoic acid. It forms a colorless crystals. Like most azides, it is a primary explosive.
Structure and chemistry
Silver azide can be prepared by treating an aqueous solution of silver nitrate with sodium azide. The silver azide preci... | Physical sciences | Nitride salts | Chemistry |
20637356 | https://en.wikipedia.org/wiki/Closure%20temperature | Closure temperature | In radiometric dating, closure temperature or blocking temperature refers to the temperature of a system, such as a mineral, at the time given by its radiometric date. In physical terms, the closure temperature is the temperature at which a system has cooled so that there is no longer any significant diffusion of the p... | Physical sciences | Geochronology | Earth science |
446216 | https://en.wikipedia.org/wiki/Decision%20theory | Decision theory | Decision theory or the theory of rational choice is a branch of probability, economics, and analytic philosophy that uses the tools of expected utility and probability to model how individuals would behave rationally under uncertainty. It differs from the cognitive and behavioral sciences in that it is mainly prescript... | Mathematics | Applied mathematics | null |
446372 | https://en.wikipedia.org/wiki/Herto%20Man | Herto Man | Herto Man refers to human remains (Homo sapiens) discovered in 1997 from the Upper Herto member of the Bouri Formation in the Afar Triangle, Ethiopia. The remains have been dated as between 154,000 and 160,000 years old. The discovery of Herto Man was especially significant at the time, falling within a long gap in the... | Biology and health sciences | Homo | Biology |
446457 | https://en.wikipedia.org/wiki/Iron%28III%29%20chloride | Iron(III) chloride | Iron(III) chloride describes the inorganic compounds with the formula (H2O)x. Also called ferric chloride, these compounds are some of the most important and commonplace compounds of iron. They are available both in anhydrous and in hydrated forms, which are both hygroscopic. They feature iron in its +3 oxidation stat... | Physical sciences | Halide salts | Chemistry |
446558 | https://en.wikipedia.org/wiki/Solo%20Man | Solo Man | Solo Man (Homo erectus soloensis) is a subspecies of H. erectus that lived along the Solo River in Java, Indonesia, about 117,000 to 108,000 years ago in the Late Pleistocene. This population is the last known record of the species. It is known from 14 skullcaps, two tibiae, and a piece of the pelvis excavated near the... | Biology and health sciences | Homo | Biology |
446712 | https://en.wikipedia.org/wiki/Josephson%20effect | Josephson effect | In physics, the Josephson effect is a phenomenon that occurs when two superconductors are placed in proximity, with some barrier or restriction between them. The effect is named after the British physicist Brian Josephson, who predicted in 1962 the mathematical relationships for the current and voltage across the weak ... | Physical sciences | Electrical circuits | Physics |
446844 | https://en.wikipedia.org/wiki/Betula%20pendula | Betula pendula | Betula pendula, commonly known as silver birch, warty birch, European white birch, or East Asian white birch, is a species of tree in the family Betulaceae, native to Europe and parts of Asia, though in southern Europe, it is only found at higher altitudes. Its range extends into Siberia, China, and southwest Asia in t... | Biology and health sciences | Fagales | Plants |
446976 | https://en.wikipedia.org/wiki/GALEX | GALEX | Galaxy Evolution Explorer (GALEX or Explorer 83 or SMEX-7) was a NASA orbiting space telescope designed to observe the universe in ultraviolet wavelengths to measure the history of star formation in the universe. In addition to paving the way for future ultraviolet missions, the space telescope allowed astronomers to u... | Technology | Space-based observatories | null |
447559 | https://en.wikipedia.org/wiki/Alnus%20rubra | Alnus rubra | Alnus rubra, the red alder,
is a deciduous broadleaf tree native to western North America (Alaska, Yukon, British Columbia, Washington, Oregon, California, Idaho and Montana).
Description
Alnus rubra is the largest species of alder in North America and one of the largest in the world, reaching heights of . The officia... | Biology and health sciences | Fagales | Plants |
447810 | https://en.wikipedia.org/wiki/Anomalopidae | Anomalopidae | Anomalopidae (lanterneye fishes or flashlight fishes) are a family of fish distinguished by bioluminescent organs located underneath their eyes, for which they are named. These light organs contain luminous bacteria and can be "shut off" by the fish using either a dark lid or by being drawn into a pouch. They are used ... | Biology and health sciences | Acanthomorpha | Animals |
447832 | https://en.wikipedia.org/wiki/Helicase | Helicase | Helicases are a class of enzymes thought to be vital to all organisms. Their main function is to unpack an organism's genetic material. Helicases are motor proteins that move directionally along a nucleotidic backbone, separating two hybridized nucleic acid strands (hence helic- + -ase), using energy from ATP hydrolysi... | Biology and health sciences | Molecular biology | Biology |
448010 | https://en.wikipedia.org/wiki/Septic%20shock | Septic shock | Septic shock is a potentially fatal medical condition that occurs when sepsis, which is organ injury or damage in response to infection, leads to dangerously low blood pressure and abnormalities in cellular metabolism. The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) defines septic s... | Biology and health sciences | Cardiovascular disease | Health |
448787 | https://en.wikipedia.org/wiki/Greater%20painted-snipe | Greater painted-snipe | The greater painted-snipe (Rostratula benghalensis) is a species of wader in the small painted-snipe family Rostratulidae. It widely distributed across Africa and southern Asia and is found in a variety of wetland habitats, including swamps and the edges of larger water bodies such as lakes and rivers. This species is ... | Biology and health sciences | Charadriiformes | Animals |
449282 | https://en.wikipedia.org/wiki/Butterflyfish | Butterflyfish | The butterflyfish are a group of conspicuous tropical marine fish of the family Chaetodontidae; the bannerfish and coralfish are also included in this group. The approximately 129 species in 12 genera are found mostly on the reefs of the Atlantic, Indian, and Pacific Oceans. A number of species pairs occur in the Indi... | Biology and health sciences | Acanthomorpha | Animals |
449568 | https://en.wikipedia.org/wiki/%E2%88%921 | −1 | In mathematics, −1 (negative one or minus one) is the additive inverse of 1, that is, the number that when added to 1 gives the additive identity element, 0. It is the negative integer greater than negative two (−2) and less than 0.
In mathematics
Algebraic properties
Multiplying a number by −1 is equivalent to chan... | Mathematics | Basics | null |
22131077 | https://en.wikipedia.org/wiki/GHS%20hazard%20pictograms | GHS hazard pictograms | Hazard pictograms form part of the international Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Two sets of pictograms are included within the GHS: one for the labelling of containers and for workplace hazard warnings, and a second for use during the transport of dangerous goods. Either ... | Physical sciences | Basics: General | Chemistry |
753962 | https://en.wikipedia.org/wiki/Circulation%20%28physics%29 | Circulation (physics) | In physics, circulation is the line integral of a vector field around a closed curve embedded in the field. In fluid dynamics, the field is the fluid velocity field. In electrodynamics, it can be the electric or the magnetic field.
In aerodynamics, circulation was first used independently by Frederick Lanchester,Ludwi... | Physical sciences | Fluid mechanics | Physics |
754487 | https://en.wikipedia.org/wiki/Permeability%20%28electromagnetism%29 | Permeability (electromagnetism) | In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter μ. It is the ratio of the magnetic induction to the magnetizing field in a material. The term was coined by Will... | Physical sciences | Magnetostatics | Physics |
754740 | https://en.wikipedia.org/wiki/Steppe%20eagle | Steppe eagle | The steppe eagle (Aquila nipalensis) is a large bird of prey. Like all eagles, it belongs to the family Accipitridae. The steppe eagle's well-feathered legs illustrate it to be a member of the subfamily Aquilinae, also known as the "booted eagles". This species was once considered to be closely related to the sedentar... | Biology and health sciences | Accipitrimorphae | Animals |
755375 | https://en.wikipedia.org/wiki/Pectoralis%20major | Pectoralis major | The pectoralis major () is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast. Beneath the pectoralis major is the pectoralis minor muscle.
The pectoralis major arises from parts of the clavicle and sternum, costal cartilages of t... | Biology and health sciences | Human anatomy | Health |
755947 | https://en.wikipedia.org/wiki/Ravelin | Ravelin | A ravelin is a triangular fortification or detached outwork, located in front of the innerworks of a fortress (the curtain walls and bastions). Originally called a demi-lune, after the lunette, the ravelin is placed outside a castle and opposite a fortification curtain wall.
The ravelin is the oldest and at the same t... | Technology | Fortification | null |
111194 | https://en.wikipedia.org/wiki/Pyroxene | Pyroxene | The pyroxenes (commonly abbreviated Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes have the general formula , where X represents calcium (Ca), sodium (Na), iron (Fe(II)) or magnesium (Mg) and more rarely zinc, manganese or lithium, and Y represents... | Physical sciences | Mineralogy | null |
36563 | https://en.wikipedia.org/wiki/Magnetic%20field | Magnetic field | A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic ... | Physical sciences | Magnetism | null |
36624 | https://en.wikipedia.org/wiki/Embryo | Embryo | An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygot... | Biology and health sciences | Animal ontogeny | null |
36790 | https://en.wikipedia.org/wiki/Artery | Artery | An artery () is a blood vessel in humans and most other animals that takes oxygenated blood away from the heart in the systemic circulation to one or more parts of the body. Exceptions that carry deoxygenated blood are the pulmonary arteries in the pulmonary circulation that carry blood to the lungs for oxygenation, an... | Biology and health sciences | Circulatory system | null |
36806 | https://en.wikipedia.org/wiki/Cotton | Cotton | Cotton () is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus Gossypium in the mallow family Malvaceae. The fiber is almost pure cellulose, and can contain minor percentages of waxes, fats, pectins, and water. Under natural conditions, the cotton b... | Technology | Materials | null |
36808 | https://en.wikipedia.org/wiki/Heart | Heart | The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. Heart and blood vessels together make the circulatory system. The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the... | Biology and health sciences | Biology | null |
36842 | https://en.wikipedia.org/wiki/Gossypium | Gossypium | Gossypium () is a genus of flowering plants in the tribe Gossypieae of the mallow family, Malvaceae, from which cotton is harvested. It is native to tropical and subtropical regions of the Old and New Worlds. There are about 50 Gossypium species, making it the largest genus in the tribe Gossypieae, and new species cont... | Biology and health sciences | Malvales | Plants |
36856 | https://en.wikipedia.org/wiki/Vertebrate | Vertebrate | Vertebrates () are animals with a vertebral column (backbone or spine), and a cranium, or skull. The vertebral column surrounds and protects the spinal cord, while the cranium protects the brain.
The vertebrates make up the subphylum Vertebrata with some 65,000 species, by far the largest grouping in the phylum Chord... | Biology and health sciences | Biology | null |
36858 | https://en.wikipedia.org/wiki/Wheat | Wheat | Wheat is a group of wild and domesticated grasses of the genus Triticum (). They are cultivated for their cereal grains, which are staple foods around the world. Well-known wheat species and hybrids include the most widely grown common wheat (T. aestivum), spelt, durum, emmer, einkorn, and Khorasan or Kamut. The archae... | Biology and health sciences | Food and drink | null |
36863 | https://en.wikipedia.org/wiki/Lung | Lung | The lungs are the primary organs of the respiratory system in many animals, including humans. In mammals and most other tetrapods, two lungs are located near the backbone on either side of the heart. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, ... | Biology and health sciences | Biology | null |
36869 | https://en.wikipedia.org/wiki/Cell%20division | Cell division | Cell division is the process by which a parent cell divides into two daughter cells. Cell division usually occurs as part of a larger cell cycle in which the cell grows and replicates its chromosome(s) before dividing. In eukaryotes, there are two distinct types of cell division: a vegetative division (mitosis), produ... | Biology and health sciences | Cellular division | Biology |
36891 | https://en.wikipedia.org/wiki/Silicate | Silicate | A silicate is any member of a family of polyatomic anions consisting of silicon and oxygen, usually with the general formula , where . The family includes orthosilicate (), metasilicate (), and pyrosilicate (, ). The name is also used for any salt of such anions, such as sodium metasilicate; or any ester containin... | Physical sciences | Salts | null |
36896 | https://en.wikipedia.org/wiki/Lion | Lion | The lion (Panthera leo) is a large cat of the genus Panthera, native to Africa and India. It has a muscular, broad-chested body; a short, rounded head; round ears; and a dark, hairy tuft at the tip of its tail. It is sexually dimorphic; adult male lions are larger than females and have a prominent mane. It is a social ... | Biology and health sciences | Carnivora | null |
36941 | https://en.wikipedia.org/wiki/Laplace%27s%20equation | Laplace's equation | In mathematics and physics, Laplace's equation is a second-order partial differential equation named after Pierre-Simon Laplace, who first studied its properties. This is often written as
or
where is the Laplace operator, is the divergence operator (also symbolized "div"), is the gradient operator (also symbolized... | Mathematics | Calculus and analysis | null |
36961 | https://en.wikipedia.org/wiki/Pion | Pion | In particle physics, a pion (, ) or pi meson, denoted with the Greek letter pi (), is any of three subatomic particles: , , and . Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions a... | Physical sciences | Bosons | Physics |
36979 | https://en.wikipedia.org/wiki/Rice | Rice | Rice is a cereal grain and in its domesticated form is the staple food of over half of the world's population, particularly in Asia and Africa. Rice is the seed of the grass species Oryza sativa (Asian rice)—or, much less commonly, Oryza glaberrima (African rice). Asian rice was domesticated in China some 13,500 to 8,2... | Biology and health sciences | Food and drink | null |
36980 | https://en.wikipedia.org/wiki/Clay | Clay | Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, Al2Si2O5(OH)4). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of ... | Physical sciences | Petrology | null |
36984 | https://en.wikipedia.org/wiki/Salmon | Salmon | Salmon (; : salmon) is the common name for several commercially important species of euryhaline ray-finned fish from the genera Salmo and Oncorhynchus of the family Salmonidae, native to tributaries of the North Atlantic (Salmo) and North Pacific (Oncorhynchus) basins. Other closely related fish in the same family incl... | Biology and health sciences | Salmoniformes | null |
37021 | https://en.wikipedia.org/wiki/Dirac%20delta%20function | Dirac delta function | In mathematical analysis, the Dirac delta function (or distribution), also known as the unit impulse, is a generalized function on the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire real line is equal to one. Thus it can be represented heuristically as
such that
Since... | Mathematics | Specific functions | null |
37035 | https://en.wikipedia.org/wiki/Conway%27s%20Game%20of%20Life | Conway's Game of Life | The Game of Life, also known as Conway's Game of Life or simply Life, is a cellular automaton devised by the British mathematician John Horton Conway in 1970. It is a zero-player game, meaning that its evolution is determined by its initial state, requiring no further input. One interacts with the Game of Life by creat... | Mathematics | Automata theory | null |
37085 | https://en.wikipedia.org/wiki/Software%20bug | Software bug | A software bug is a design defect (bug) in computer software. A computer program with many or serious bugs may be described as buggy.
The effects of a software bug range from minor (such as a misspelled word in the user interface) to severe (such as frequent crashing).
In 2002, a study commissioned by the US Departm... | Technology | Software development: General | null |
37096 | https://en.wikipedia.org/wiki/Floating-point%20unit | Floating-point unit | A floating-point unit (FPU), numeric processing unit (NPU), colloquially math coprocessor, is a part of a computer system specially designed to carry out operations on floating-point numbers. Typical operations are addition, subtraction, multiplication, division, and square root. Some FPUs can also perform various tra... | Technology | Computer hardware | null |
37138 | https://en.wikipedia.org/wiki/Arabidopsis%20thaliana | Arabidopsis thaliana | Arabidopsis thaliana, the thale cress, mouse-ear cress or arabidopsis, is a small plant from the mustard family (Brassicaceae), native to Eurasia and Africa. Commonly found along the shoulders of roads and in disturbed land, it is generally considered a weed.
A winter annual with a relatively short lifecycle, A. thali... | Biology and health sciences | Brassicales | null |
37149 | https://en.wikipedia.org/wiki/Cranial%20nerves | Cranial nerves | Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), of which there are conventionally considered twelve pairs. Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck, including the special senses of vision, ta... | Biology and health sciences | Nervous system | Biology |
37153 | https://en.wikipedia.org/wiki/Supercomputer | Supercomputer | A supercomputer is a type of computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS). Since 2022, supercomputers have existed which can p... | Technology | Computer hardware | null |
37207 | https://en.wikipedia.org/wiki/Nuclear%20engineering | Nuclear engineering | Nuclear engineering is the engineering discipline concerned with designing and applying systems that utilize the energy released by nuclear processes.
The most prominent application of nuclear engineering is the generation of electricity. Worldwide, some 440 nuclear reactors in 32 countries generate 10 percent of the w... | Technology | Disciplines | null |
37208 | https://en.wikipedia.org/wiki/Landslide | Landslide | Landslides, also known as landslips, or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradi... | Physical sciences | Natural disasters | null |
37220 | https://en.wikipedia.org/wiki/Infection | Infection | An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.
Infections can be caused by ... | Biology and health sciences | Illness and injury | null |
37232 | https://en.wikipedia.org/wiki/Fermat%27s%20principle | Fermat's principle | Fermat's principle, also known as the principle of least time, is the link between ray optics and wave optics. Fermat's principle states that the path taken by a ray between two given points is the path that can be traveled in the least time.
First proposed by the French mathematician Pierre de Fermat in 1662, as a me... | Physical sciences | Waves | Physics |
37277 | https://en.wikipedia.org/wiki/Rubidium%E2%80%93strontium%20dating | Rubidium–strontium dating | The rubidium–strontium dating method (Rb–Sr) is a radiometric dating technique, used by scientists to determine the age of rocks and minerals from their content of specific isotopes of rubidium (87Rb) and strontium (87Sr, 86Sr). One of the two naturally occurring isotopes of rubidium, 87Rb, decays to 87Sr with a half-l... | Physical sciences | Geochronology | Earth science |
37278 | https://en.wikipedia.org/wiki/Galago | Galago | Galagos , also known as bush babies or nagapies (meaning "night monkeys" in Afrikaans), are small nocturnal primates native to continental, sub-Sahara Africa, and make up the family Galagidae (also sometimes called Galagonidae). They are considered a sister group of the Lorisidae.
According to some accounts, the name ... | Biology and health sciences | Primates | null |
37284 | https://en.wikipedia.org/wiki/Brain%20tumor | Brain tumor | A brain tumor occurs when a group of cells within the brain turn cancerous and grow out of control, creating a mass. There are two main types of tumors: malignant (cancerous) tumors and benign (non-cancerous) tumors. These can be further classified as primary tumors, which start within the brain, and secondary tumors, ... | Biology and health sciences | Cancer | null |
37315 | https://en.wikipedia.org/wiki/Computer-aided%20design | Computer-aided design | Computer-aided design (CAD) is the use of computers (or ) to aid in the creation, modification, analysis, or optimization of a design. This software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturi... | Technology | Basics | null |
37329 | https://en.wikipedia.org/wiki/Aldehyde | Aldehyde | In organic chemistry, an aldehyde () is an organic compound containing a functional group with the structure . The functional group itself (without the "R" side chain) can be referred to as an aldehyde but can also be classified as a formyl group. Aldehydes are a common motif in many chemicals important in technology a... | Physical sciences | Carbon–oxygen bond | null |
37335 | https://en.wikipedia.org/wiki/Drought | Drought | A drought is a period of drier-than-normal conditions. A drought can last for days, months or years. Drought often has large impacts on the ecosystems and agriculture of affected regions, and causes harm to the local economy. Annual dry seasons in the tropics significantly increase the chances of a drought developing, ... | Physical sciences | Natural disasters | null |
37379 | https://en.wikipedia.org/wiki/Relative%20density | Relative density | Relative density, also called specific gravity, is a dimensionless quantity defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for solids and liquids is nearly always measured with respect to water at its densest (at ); for gases, th... | Physical sciences | Ratio | Basics and measurement |
37400 | https://en.wikipedia.org/wiki/Mole%20%28unit%29 | Mole (unit) | The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance, an SI base quantity proportional to the number of elementary entities of a substance. One mole is an aggregate of exactly elementary entities (approximately 602 sextillion or 602 billion tim... | Physical sciences | Amount of substance | null |
37401 | https://en.wikipedia.org/wiki/Fertilizer | Fertilizer | A fertilizer (American English) or fertiliser (British English) is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments. Many sources of fertilizer exist, both natural an... | Technology | Food and health | null |
37402 | https://en.wikipedia.org/wiki/Chicken | Chicken | The chicken (Gallus gallus domesticus) is a large and round short-winged bird, domesticated from the red junglefowl of Southeast Asia around 8,000 years ago. Most chickens are raised for food, providing meat and eggs; others are kept as pets or for cockfighting.
Chickens are common and widespread domestic animals, wit... | Biology and health sciences | Biology | null |
37411 | https://en.wikipedia.org/wiki/Alkaline%20earth%20metal | Alkaline earth metal | |-
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The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radi... | Physical sciences | Chemical element groups | null |
37421 | https://en.wikipedia.org/wiki/Bowline | Bowline | The bowline ( or ) is an ancient and simple knot used to form a fixed loop at the end of a rope. It has the virtues of being both easy to tie and untie; most notably, it is easy to untie after being subjected to a load. The bowline is sometimes referred to as king of the knots because of its importance. Along with the ... | Technology | Flexible components | null |
37427 | https://en.wikipedia.org/wiki/Le%20Chatelier%27s%20principle | Le Chatelier's principle | In chemistry, Le Chatelier's principle (pronounced or ) is a principle used to predict the effect of a change in conditions on chemical equilibrium. Other names include Chatelier's principle, Braun–Le Chatelier principle, Le Chatelier–Braun principle or the equilibrium law.
The principle is named after French chemist... | Physical sciences | Reaction | Chemistry |
37431 | https://en.wikipedia.org/wiki/Solvent | Solvent | A solvent (from the Latin solvō, "loosen, untie, solve") is a substance that dissolves a solute, resulting in a solution. A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid. Water is a solvent for polar molecules, and the most common solvent used by living things; all the ions and pr... | Physical sciences | Mixture | Chemistry |
37438 | https://en.wikipedia.org/wiki/Complex%20system | Complex system | A complex system is a system composed of many components which may interact with each other. Examples of complex systems are Earth's global climate, organisms, the human brain, infrastructure such as power grid, transportation or communication systems, complex software and electronic systems, social and economic organi... | Physical sciences | Science basics | Basics and measurement |
37441 | https://en.wikipedia.org/wiki/Nitrous%20oxide | Nitrous oxide | Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, or factitious air, among others, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, and has a slightly sweet scent and taste. At elevated temperatures... | Physical sciences | Inorganic compounds | null |
37447 | https://en.wikipedia.org/wiki/Latin%20square | Latin square | In combinatorics and in experimental design, a Latin square is an n × n array filled with n different symbols, each occurring exactly once in each row and exactly once in each column. An example of a 3×3 Latin square is
The name "Latin square" was inspired by mathematical papers by Leonhard Euler (1707–1783), who use... | Mathematics | Combinatorics | null |
37461 | https://en.wikipedia.org/wiki/State%20of%20matter | State of matter | In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Many intermediate states are known to exist, such as liquid crystal, and some states only exist under extreme conditions, such as Bose–Einstein con... | Physical sciences | Physics | null |
37481 | https://en.wikipedia.org/wiki/Intranet | Intranet | An intranet is a computer network for sharing information, easier communication, collaboration tools, operational systems, and other computing services within an organization, usually to the exclusion of access by outsiders. The term is used in contrast to public networks, such as the Internet, but uses the same techno... | Technology | Networks | null |
37506 | https://en.wikipedia.org/wiki/Garnet | Garnet | Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives.
All species of garnets possess similar physical properties and crystal forms, but differ in chemical composition. The different species are pyrope, almandine, spessartine, grossular (varieties of which are ... | Physical sciences | Silicate minerals | Earth science |
37508 | https://en.wikipedia.org/wiki/Magma | Magma | Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma (sometimes colloquially but incorrectly referred to as lava) is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besid... | Physical sciences | Petrology | null |
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