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1640343 | https://en.wikipedia.org/wiki/Kreutz%20sungrazer | Kreutz sungrazer | The Kreutz sungrazers ( ) are a family of sungrazing comets, characterized by orbits taking them extremely close to the Sun at perihelion. At the far extreme of their orbits, aphelion, Kreutz sungrazers can be a hundred times farther from the Sun than the Earth is, while their distance of closest approach can be less t... | Physical sciences | Notable comets | Astronomy |
1641247 | https://en.wikipedia.org/wiki/Anti-reflective%20coating | Anti-reflective coating | An antireflective, antiglare or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses, other optical elements, and photovoltaic cells to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost due to reflection. In complex systems such as... | Technology | Optics | null |
1642993 | https://en.wikipedia.org/wiki/Cotton%20picker | Cotton picker | A cotton picker is either a machine that harvests cotton, or a person who picks ripe cotton fibre from the plants. The machine is also referred to as a cotton harvester.
History
In many societies, slave labor was utilized to pick the cotton, increasing the plantation owner's profit margins (See Trans-Atlantic Slave T... | Technology | Farm and garden machinery | null |
12163350 | https://en.wikipedia.org/wiki/Whirlwind | Whirlwind | A whirlwind is a phenomenon in which a vortex of wind (a vertically oriented rotating column of air) forms due to instabilities and turbulence created by heating and flow (current) gradients. Whirlwinds can vary in size and last from a couple minutes to a couple hours.
Types
Whirlwinds are subdivided into two
types,... | Physical sciences | Storms | Earth science |
7490861 | https://en.wikipedia.org/wiki/Magnetic-tape%20data%20storage | Magnetic-tape data storage | Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording.
Tape was an important medium for primary data storage in early computers, typically using large open reels of 7-track, later 9-track tape. Modern magnetic tape is most commonly packaged in cartridges and c... | Technology | Non-volatile memory | null |
7498981 | https://en.wikipedia.org/wiki/Cross-flow%20filtration | Cross-flow filtration | In chemical engineering, biochemical engineering and protein purification, cross-flow filtration (also known as tangential flow filtration) is a type of filtration (a particular unit operation). Cross-flow filtration is different from dead-end filtration in which the feed is passed through a membrane or bed, the solids... | Physical sciences | Other separations | Chemistry |
14840572 | https://en.wikipedia.org/wiki/Numerical%20relay | Numerical relay | In utility and industrial electric power transmission and distribution systems, a numerical relay is a computer-based system with software-based protection algorithms for the detection of electrical faults. Such relays are also termed as microprocessor type protective relays. They are functional replacements for electr... | Technology | Electrical protective devices | null |
5744114 | https://en.wikipedia.org/wiki/Method%20of%20lines | Method of lines | The method of lines (MOL, NMOL, NUMOL) is a technique for solving partial differential equations (PDEs) in which all but one dimension is discretized. By reducing a PDE to a single continuous dimension, the method of lines allows solutions to be computed via methods and software developed for the numerical integration ... | Mathematics | Differential equations | null |
5747651 | https://en.wikipedia.org/wiki/Powder%20keg | Powder keg | A powder keg is a barrel of gunpowder. The powder keg was the primary method for storing and transporting large quantities of black powder until the 1870s and the adoption of the modern cased cartridge. The barrels had to be handled with care, since a spark or other source of heat could cause the contents to deflagrate... | Technology | Ammunition | null |
638291 | https://en.wikipedia.org/wiki/Red%20squirrel | Red squirrel | The red squirrel (Sciurus vulgaris), also called Eurasian red squirrel, is a species of tree squirrel in the genus Sciurus. It is an arboreal and primarily herbivorous rodent and common throughout Eurasia.
Taxonomy
There have been over 40 described subspecies of the red squirrel, but the taxonomic status of some of t... | Biology and health sciences | Rodents | Animals |
638364 | https://en.wikipedia.org/wiki/Salix%20alba | Salix alba | Salix alba, the white willow, is a species of willow native to Europe and western and central Asia. The name derives from the white tone to the undersides of the leaves.
It is a medium to large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown. The bark is... | Biology and health sciences | Malpighiales | Plants |
638469 | https://en.wikipedia.org/wiki/American%20Shorthair | American Shorthair | The American Shorthair (ASH) is a breed of domestic cat believed to be descended from European cats brought to North America by early settlers to protect valuable cargo from mice and rats. According to the Cat Fanciers' Association, it was the eighth most popular pedigreed cat in the world for 2020.
History
When settl... | Biology and health sciences | Cats | Animals |
638719 | https://en.wikipedia.org/wiki/Tortricidae | Tortricidae | The Tortricidae are a family of moths, commonly known as tortrix moths or leafroller moths, in the order Lepidoptera. This large family has over 11,000 species described, and is the sole member of the superfamily Tortricoidea, although the genus Heliocosma is sometimes placed within this superfamily. Many of these are ... | Biology and health sciences | Lepidoptera | Animals |
638889 | https://en.wikipedia.org/wiki/Path%20%28graph%20theory%29 | Path (graph theory) | In graph theory, a path in a graph is a finite or infinite sequence of edges which joins a sequence of vertices which, by most definitions, are all distinct (and since the vertices are distinct, so are the edges). A directed path (sometimes called dipath) in a directed graph is a finite or infinite sequence of edges wh... | Mathematics | Graph theory | null |
638969 | https://en.wikipedia.org/wiki/Forceps | Forceps | Forceps (: forceps or considered a plural noun without a singular, often a pair of forceps; the Latin plural forcipes is no longer recorded in most dictionaries) are a handheld, hinged instrument used for grasping and holding objects. Forceps are used when fingers are too large to grasp small objects or when many objec... | Technology | Surgical instruments | null |
639599 | https://en.wikipedia.org/wiki/Kyiv%20Metro | Kyiv Metro | The Kyiv Metro (, ) is a rapid transit system in Kyiv owned by the Kyiv City Council and operated by the city-owned company Kyivskyi Metropoliten. It was initially opened on November 6, 1960, as a single line with five stations. It was the first rapid transit system in Ukraine.
Today, the system consists of three lin... | Technology | Europe_2 | null |
639613 | https://en.wikipedia.org/wiki/Oriental%20Shorthair | Oriental Shorthair | The Oriental Shorthair is a breed of domestic cat that is developed from and closely related to the Siamese cat. It maintains the modern Siamese head and body type but appears in a wide range of coat colors and patterns. Like the Siamese, Orientals have almond-shaped eyes, a triangular head shape, large ears, and an el... | Biology and health sciences | Cats | Animals |
639754 | https://en.wikipedia.org/wiki/Turkish%20Angora | Turkish Angora | The Turkish Angora (, 'Ankara cat') is a breed of domestic cat. Turkish Angoras are one of the ancient, natural breeds of cat, having originated in central Anatolia (Ankara Province in modern-day Turkey). The breed has been documented as early as the 17th century. Outside of the United States, the breed is usually refe... | Biology and health sciences | Cats | Animals |
639790 | https://en.wikipedia.org/wiki/Discovery%20of%20cosmic%20microwave%20background%20radiation | Discovery of cosmic microwave background radiation | The discovery of cosmic microwave background radiation constitutes a major development in modern physical cosmology. In 1964, US physicist Arno Allan Penzias and radio-astronomer Robert Woodrow Wilson discovered the cosmic microwave background (CMB), estimating its temperature as 3.5 K, as they experimented with the Ho... | Physical sciences | Physical cosmology | Astronomy |
639924 | https://en.wikipedia.org/wiki/Diet%20%28nutrition%29 | Diet (nutrition) | In nutrition, diet is the sum of food consumed by a person or other organism.
The word diet often implies the use of specific intake of nutrition for health or weight-management reasons (with the two often being related). Although humans are omnivores, each culture and each person holds some food preferences or some fo... | Biology and health sciences | Health and fitness | null |
640249 | https://en.wikipedia.org/wiki/Saddle%20point | Saddle point | In mathematics, a saddle point or minimax point is a point on the surface of the graph of a function where the slopes (derivatives) in orthogonal directions are all zero (a critical point), but which is not a local extremum of the function. An example of a saddle point is when there is a critical point with a relative... | Mathematics | Functions: General | null |
640746 | https://en.wikipedia.org/wiki/Secant%20method | Secant method | In numerical analysis, the secant method is a root-finding algorithm that uses a succession of roots of secant lines to better approximate a root of a function f. The secant method can be thought of as a finite-difference approximation of Newton's method, so it is considered a quasi-Newton method. Historically, it is ... | Mathematics | Real analysis | null |
640755 | https://en.wikipedia.org/wiki/Gun%20barrel | Gun barrel | A gun barrel is a crucial part of gun-type weapons such as small firearms, artillery pieces, and air guns. It is the straight shooting tube, usually made of rigid high-strength metal, through which a contained rapid expansion of high-pressure gas(es) is used to propel a projectile out of the front end (muzzle) at a hi... | Technology | Mechanisms_2 | null |
640764 | https://en.wikipedia.org/wiki/Barrel | Barrel | A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, usually alcoholic beverages; a small barrel or cask is known as a keg.
Barrels ... | Technology | Containers | null |
641156 | https://en.wikipedia.org/wiki/Bruise | Bruise | A bruise, also known as a contusion, is a type of hematoma of tissue, the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration.... | Biology and health sciences | Injury | null |
641160 | https://en.wikipedia.org/wiki/Lymphatic%20vessel | Lymphatic vessel | The lymphatic vessels (or lymph vessels or lymphatics) are thin-walled vessels (tubes), structured like blood vessels, that carry lymph. As part of the lymphatic system, lymph vessels are complementary to the cardiovascular system. Lymph vessels are lined by endothelial cells, and have a thin layer of smooth muscle, an... | Biology and health sciences | Circulatory system | Biology |
641696 | https://en.wikipedia.org/wiki/Generalized%20anxiety%20disorder | Generalized anxiety disorder | Generalized anxiety disorder (GAD) is an anxiety disorder characterized by excessive, uncontrollable and often irrational worry about events or activities. Worry often interferes with daily functioning, and individuals with GAD are often overly concerned about everyday matters such as health, finances, death, family, r... | Biology and health sciences | Mental disorders | Health |
641915 | https://en.wikipedia.org/wiki/Tidal%20island | Tidal island | A tidal island is a raised area of land within a waterbody, which is connected to the larger mainland by a natural isthmus or man-made causeway that is exposed at low tide and submerged at high tide, causing the land to switch between being a promontory/peninsula and an island depending on tidal conditions.
Because of... | Physical sciences | Oceanic and coastal landforms | Earth science |
641982 | https://en.wikipedia.org/wiki/Mushroom%20poisoning | Mushroom poisoning | Mushroom poisoning is poisoning resulting from the ingestion of mushrooms that contain toxic substances. Symptoms can vary from slight gastrointestinal discomfort to death in about 10 days. Mushroom toxins are secondary metabolites produced by the fungus.
Mushroom poisoning is usually the result of ingestion of wild m... | Biology and health sciences | Miscellaneous | null |
641995 | https://en.wikipedia.org/wiki/Asymptotic%20analysis | Asymptotic analysis | In mathematical analysis, asymptotic analysis, also known as asymptotics, is a method of describing limiting behavior.
As an illustration, suppose that we are interested in the properties of a function as becomes very large. If , then as becomes very large, the term becomes insignificant compared to . The function... | Mathematics | Mathematical analysis | null |
642002 | https://en.wikipedia.org/wiki/Common%20hill%20myna | Common hill myna | The common hill myna (Gracula religiosa), sometimes spelled "mynah" and formerly simply known as the hill myna or myna bird, is the myna most commonly sighted in aviculture, where it is often simply referred to by the latter two names. It is a member of the starling family (Sturnidae), resident in hill regions of South... | Biology and health sciences | Passerida | Animals |
642101 | https://en.wikipedia.org/wiki/Cardioid | Cardioid | In geometry, a cardioid () is a plane curve traced by a point on the perimeter of a circle that is rolling around a fixed circle of the same radius. It can also be defined as an epicycloid having a single cusp. It is also a type of sinusoidal spiral, and an inverse curve of the parabola with the focus as the center of ... | Mathematics | Two-dimensional space | null |
4313282 | https://en.wikipedia.org/wiki/Soil%20morphology | Soil morphology | Soil morphology is the branch of soil science dedicated to the technical description of soil, particularly physical properties including texture, color, structure, and consistence. Morphological evaluations of soil are typically performed in the field on a soil profile containing multiple horizons.
Along with soil for... | Physical sciences | Soil science | Earth science |
4313746 | https://en.wikipedia.org/wiki/Born%20rule | Born rule | The Born rule is a postulate of quantum mechanics that gives the probability that a measurement of a quantum system will yield a given result. In one commonly used application, it states that the probability density for finding a particle at a given position is proportional to the square of the amplitude of the system'... | Physical sciences | Quantum mechanics | Physics |
4315137 | https://en.wikipedia.org/wiki/Kiwa%20hirsuta | Kiwa hirsuta | Kiwa hirsuta is a crustacean discovered in 2005 in the South Pacific Ocean. This decapod, which is approximately long, is notable for the quantity of silky blond setae (resembling fur) covering its pereiopods (thoracic legs, including claws). Its discoverers dubbed it the "yeti lobster" or "yeti crab".
Identification... | Biology and health sciences | Crabs and hermit crabs | Animals |
4315947 | https://en.wikipedia.org/wiki/Honduran%20white%20bat | Honduran white bat | The Honduran white bat (Ectophylla alba), also called the Caribbean white tent-making bat, is a species of bat in the family Phyllostomatidae. It is the only member of the genus Ectophylla. The genus and the species were both scientifically described for the first time in 1892. It has distinctive, entirely white fur, w... | Biology and health sciences | Bats | Animals |
9716092 | https://en.wikipedia.org/wiki/Codeine | Codeine | Codeine is an opiate and prodrug of morphine mainly used to treat pain, coughing, and diarrhea. It is also commonly used as a recreational drug. It is found naturally in the sap of the opium poppy, Papaver somniferum. It is typically used to treat mild to moderate degrees of pain. Greater benefit may occur when combine... | Biology and health sciences | Pain treatments | Health |
9722260 | https://en.wikipedia.org/wiki/Chemical%20substance | Chemical substance | A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. If a mixture is separa... | Physical sciences | Chemistry: General | null |
2301573 | https://en.wikipedia.org/wiki/Daylight | Daylight | Daylight is the combination of all direct and indirect sunlight during the daytime. This includes direct sunlight, diffuse sky radiation, and (often) both of these reflected by Earth and terrestrial objects, like landforms and buildings. Sunlight scattered or reflected by astronomical objects is generally not considere... | Physical sciences | Celestial mechanics | Astronomy |
2304367 | https://en.wikipedia.org/wiki/Videotelephony | Videotelephony | Videotelephony (also known as videoconferencing or video calling) is the use of audio and video for simultaneous two-way communication. Today, videotelephony is widespread. There are many terms to refer to videotelephony. Videophones are standalone devices for video calling (compare Telephone). In the present day, devi... | Technology | Telecommunications | null |
1075071 | https://en.wikipedia.org/wiki/Transcriptome | Transcriptome | The transcriptome is the set of all RNA transcripts, including coding and non-coding, in an individual or a population of cells. The term can also sometimes be used to refer to all RNAs, or just mRNA, depending on the particular experiment. The term transcriptome is a portmanteau of the words transcript and genome; it ... | Biology and health sciences | Molecular biology | Biology |
1076188 | https://en.wikipedia.org/wiki/Xenopeltis | Xenopeltis | Xenopeltis, the sunbeam snakes, are the sole genus of the monotypic family Xenopeltidae, the species of which are found in Southeast Asia. Sunbeam snakes are known for their highly iridescent scales. Three species are recognized, each one with no subspecies. Studies of DNA suggest that the xenopeltids are most closely... | Biology and health sciences | Snakes | Animals |
1076314 | https://en.wikipedia.org/wiki/Ailuridae | Ailuridae | Ailuridae is a family in the mammal order Carnivora. The family consists of the red panda (the sole living representative) and its extinct relatives.
Georges Cuvier first described Ailurus as belonging to the raccoon family in 1825; this classification has been controversial ever since. It was classified in the raccoo... | Biology and health sciences | Other carnivora | Animals |
1077261 | https://en.wikipedia.org/wiki/Spin%20quantum%20number | Spin quantum number | In physics and chemistry, the spin quantum number is a quantum number (designated ) that describes the intrinsic angular momentum (or spin angular momentum, or simply spin) of an electron or other particle. It has the same value for all particles of the same type, such as = for all electrons. It is an integer for all... | Physical sciences | Atomic physics | Physics |
1077335 | https://en.wikipedia.org/wiki/Polar%20stratospheric%20cloud | Polar stratospheric cloud | Polar stratospheric clouds (PSCs) are clouds in the winter polar stratosphere at altitudes of . They are best observed during civil twilight, when the Sun is between 1 and 6 degrees below the horizon, as well as in winter and in more northerly latitudes. One main type of PSC is made up mostly of supercooled droplets of... | Physical sciences | Clouds | Earth science |
1077688 | https://en.wikipedia.org/wiki/Catechin | Catechin | Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids.
The name of the catechin chemical family derives from catechu, which is the tannic juice or boiled extract of Mimosa catechu (Acacia catechu L.f).
Chemistry
... | Physical sciences | Polyphenols | Chemistry |
1078092 | https://en.wikipedia.org/wiki/Dental%20restoration | Dental restoration | Dental restoration, dental fillings, or simply fillings are treatments used to restore the function, integrity, and morphology of missing tooth structure resulting from caries or external trauma as well as to the replacement of such structure supported by dental implants. They are of two broad types—direct and indirec... | Biology and health sciences | Dentistry | null |
369232 | https://en.wikipedia.org/wiki/Leafcutter%20ant | Leafcutter ant | Leafcutter ants are fungus-growing ants that share the behaviour of cutting leaves which they carry back to their nests to farm fungus. Next to humans, leafcutter ants form some of the largest and most complex animal societies on Earth. In a few years, the central mound of their underground nests can grow to more than ... | Biology and health sciences | Hymenoptera | Animals |
369236 | https://en.wikipedia.org/wiki/Hereford%20cattle | Hereford cattle | The Hereford is a British breed of beef cattle originally from Herefordshire in the West Midlands of England. It was the result of selective breeding from the mid-eighteenth century by a few families in Herefordshire, beginning some decades before the noted work of Robert Bakewell.
It has spread to many countries; in... | Biology and health sciences | Cattle | null |
369482 | https://en.wikipedia.org/wiki/Addition%20reaction | Addition reaction | In organic chemistry, an addition reaction is an organic reaction in which two or more molecules combine to form a larger molecule called the adduct.
An addition reaction is limited to chemical compounds that have multiple bonds. Examples include a molecule with a carbon–carbon double bond (an alkene) or a triple bon... | Physical sciences | Organic reactions | Chemistry |
369685 | https://en.wikipedia.org/wiki/Walkie-talkie | Walkie-talkie | A walkie-talkie, more formally known as a handheld transceiver, HT, or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at Motorola. First us... | Technology | Broadcasting | null |
369730 | https://en.wikipedia.org/wiki/Body%20dysmorphic%20disorder | Body dysmorphic disorder | Body dysmorphic disorder (BDD), also known in some contexts as dysmorphophobia, is a mental disorder defined by an overwhelming preoccupation with a perceived flaw in one's physical appearance. In BDD's delusional variant, the flaw is imagined. When an actual visible difference exists, its importance is disproportionat... | Biology and health sciences | Mental disorders | Health |
369836 | https://en.wikipedia.org/wiki/Holstein%20Friesian | Holstein Friesian | The Holstein Friesian is an international breed or group of breeds of dairy cattle. It originated in Frisia, stretching from the Dutch province of North Holland to the German state of Schleswig-Holstein. It is the dominant breed in industrial dairy farming worldwide, and is found in more than 160 countries. It is known... | Biology and health sciences | Cattle | null |
370022 | https://en.wikipedia.org/wiki/Suidae | Suidae | Suidae is a family of artiodactyl mammals which are commonly called pigs, hogs, or swine. In addition to numerous fossil species, 18 extant species are currently recognized (or 19 counting domestic pigs and wild boars separately), classified into between four and eight genera. Within this family, the genus Sus includes... | Biology and health sciences | Pigs_2 | Animals |
370312 | https://en.wikipedia.org/wiki/Bitter%20orange | Bitter orange | The bitter orange, sour orange, Seville orange, bigarade orange, or marmalade orange is the hybrid citrus tree species Citrus × aurantium, and its fruit. It is native to Southeast Asia and has been spread by humans to many parts of the world. It is a cross between the pomelo, Citrus maxima, and the wild type mandarin o... | Biology and health sciences | Citrus fruits | Plants |
370666 | https://en.wikipedia.org/wiki/Passenger%20ship | Passenger ship | A passenger ship is a merchant ship whose primary function is to carry passengers on the sea. The category does not include cargo vessels which have accommodations for limited numbers of passengers, such as the ubiquitous twelve-passenger freighters once common on the seas in which the transport of passengers is second... | Technology | Maritime transport | null |
370734 | https://en.wikipedia.org/wiki/Rhodochrosite | Rhodochrosite | Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its pure form (rare), it is typically a rose-red colour, but it can also be shades of pink to pale brown. It streaks white, and its Mohs hardness varies between 3.5 and 4.5. Its specific gravity is between 3.45 and 3.6. The crystal syste... | Physical sciences | Minerals | Earth science |
371224 | https://en.wikipedia.org/wiki/Calcareous%20sponge | Calcareous sponge | The calcareous sponges (class Calcarea) are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium carbonate, in the form of high-magnesium calcite or aragonite. While the spicules in most species are triradiate (with three points in a single plane), some species... | Biology and health sciences | Porifera | Animals |
371272 | https://en.wikipedia.org/wiki/Thrips | Thrips | Thrips (order Thysanoptera) are minute (mostly long or less), slender insects with fringed wings and unique asymmetrical mouthparts. Entomologists have described approximately 7,700 species. They fly only weakly and their feathery wings are unsuitable for conventional flight; instead, thrips exploit an unusual mechani... | Biology and health sciences | Insects: General | Animals |
371299 | https://en.wikipedia.org/wiki/Qualitative%20research | Qualitative research | Qualitative research is a type of research that aims to gather and analyse non-numerical (descriptive) data in order to gain an understanding of individuals' social reality, including understanding their attitudes, beliefs, and motivation. This type of research typically involves in-depth interviews, focus groups, or f... | Physical sciences | Research methods | Basics and measurement |
371406 | https://en.wikipedia.org/wiki/Meadow | Meadow | A meadow ( ) is an open habitat or field, vegetated by grasses, herbs, and other non-woody plants. Trees or shrubs may sparsely populate meadows, as long as these areas maintain an open character. Meadows can occur naturally under favourable conditions, but are often artificially created from cleared shrub or woodland ... | Physical sciences | Grasslands | null |
371461 | https://en.wikipedia.org/wiki/Acorus | Acorus | Acorus is a genus of monocot flowering plants. This genus was once placed within the family Araceae (aroids), but more recent classifications place it in its own family Acoraceae and order Acorales, of which it is the sole genus of the oldest surviving line of monocots. Some older studies indicated that it was placed i... | Biology and health sciences | Acorales | Plants |
371462 | https://en.wikipedia.org/wiki/Fraunhofer%20lines | Fraunhofer lines | The Fraunhofer lines are a set of spectral absorption lines. They are dark absorption lines, seen in the optical spectrum of the Sun, and are formed when atoms in the solar atmosphere absorb light being emitted by the solar photosphere. The lines are named after German physicist Joseph von Fraunhofer, who observed them... | Physical sciences | Basics | Astronomy |
371540 | https://en.wikipedia.org/wiki/Acorus%20calamus | Acorus calamus | Acorus calamus (also called sweet flag, sway or muskrat root, among many other common names) is a species of flowering plant with psychoactive chemicals. It is a tall wetland monocot of the family Acoraceae, in the genus Acorus. Although used in traditional medicine over centuries to treat digestive disorders and pain,... | Biology and health sciences | Acorales | Plants |
371549 | https://en.wikipedia.org/wiki/Plethodontidae | Plethodontidae | Plethodontidae, or lungless salamanders, are a family of salamanders. With over 500 species, lungless salamanders are by far the largest family of salamanders in terms of their diversity. Most species are native to the Western Hemisphere, from British Columbia to Brazil. Only two extant genera occur in the Eastern Hemi... | Biology and health sciences | Salamanders and newts | Animals |
371585 | https://en.wikipedia.org/wiki/Pine%20squirrel | Pine squirrel | Pine squirrels are squirrels of the genus Tamiasciurus, in the Sciurini tribe, of the large family Sciuridae.
Species
This genus includes three species:
Tamiasciurus douglasii — Douglas squirrel
T. d. mearnsi — Mearns's squirrel
Tamiasciurus fremonti — southwestern red squirrel
T. f. grahamensis — Mount Graham red s... | Biology and health sciences | Rodents | Animals |
371656 | https://en.wikipedia.org/wiki/Bornite | Bornite | Bornite, also known as peacock ore, is a sulfide mineral with chemical composition that crystallizes in the orthorhombic system (pseudo-cubic). It is an important copper ore.
Appearance
Bornite has a brown to copper-red color on fresh surfaces that tarnishes to various iridescent shades of blue to purple in places. ... | Physical sciences | Minerals | Earth science |
371786 | https://en.wikipedia.org/wiki/Iridescence | Iridescence | Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear gradually to change colour as the angle of view or the angle of illumination changes. Iridescence is caused by wave interference of light in microstructures or thin films. Examples of iridescence include soap bubbles, feathers, ... | Physical sciences | Optics | Physics |
371830 | https://en.wikipedia.org/wiki/Durum%20wheat | Durum wheat | Durum wheat (), also called pasta wheat or macaroni wheat (Triticum durum or Triticum turgidum subsp. durum), is a tetraploid species of wheat. It is the second most cultivated species of wheat after common wheat, although it represents only 5% to 8% of global wheat production. It was developed by artificial selection ... | Biology and health sciences | Grains | Plants |
372305 | https://en.wikipedia.org/wiki/Pilot%20whale | Pilot whale | Pilot whales are cetaceans belonging to the genus Globicephala. The two extant species are the long-finned pilot whale (G. melas) and the short-finned pilot whale (G. macrorhynchus). The two are not readily distinguishable at sea, and analysis of the skulls is the best way to distinguish between the species. Between th... | Biology and health sciences | Toothed whale | Animals |
372399 | https://en.wikipedia.org/wiki/Opposite%20category | Opposite category | In category theory, a branch of mathematics, the opposite category or dual category Cop of a given category C is formed by reversing the morphisms, i.e. interchanging the source and target of each morphism. Doing the reversal twice yields the original category, so the opposite of an opposite category is the original ca... | Mathematics | Category theory | null |
372608 | https://en.wikipedia.org/wiki/Milankovitch%20cycles | Milankovitch cycles | Milankovitch cycles describe the collective effects of changes in the Earth's movements on its climate over thousands of years. The term was coined and named after the Serbian geophysicist and astronomer Milutin Milanković. In the 1920s, he provided a more definitive and quantitative analysis than James Croll's earlier... | Physical sciences | Earth science basics: General | Earth science |
17703619 | https://en.wikipedia.org/wiki/Human%E2%80%93wildlife%20conflict | Human–wildlife conflict | Human–wildlife conflict (HWC) refers to the negative interactions between humans and wild animals, with undesirable consequences both for people and their resources on the one hand, and wildlife and their habitats on the other. HWC, caused by competition for natural resources between human and wildlife, influences hum... | Physical sciences | Earth science basics: General | Earth science |
17704946 | https://en.wikipedia.org/wiki/Epigenomics | Epigenomics | Epigenomics is the study of the complete set of epigenetic modifications on the genetic material of a cell, known as the epigenome. The field is analogous to genomics and proteomics, which are the study of the genome and proteome of a cell. Epigenetic modifications are reversible modifications on a cell's DNA or histon... | Biology and health sciences | Genetics | Biology |
3172714 | https://en.wikipedia.org/wiki/Cornu%20aspersum | Cornu aspersum | Cornu aspersum (syn. Helix aspersa, Cryptomphalus aspersus), known by the common name garden snail, is a species of land snail in the family Helicidae, which includes some of the most familiar land snails. Of all terrestrial molluscs, this species may well be the most widely known. It was classified under the name Heli... | Biology and health sciences | Gastropods | Animals |
3172719 | https://en.wikipedia.org/wiki/Helix%20pomatia | Helix pomatia | Helix pomatia, known as the Roman snail, Burgundy snail, or escargot, is a species of large, air-breathing stylommatophoran land snail native to Europe. It is characterized by a globular brown shell. It is an edible species which commonly occurs synanthropically throughout its range.
Distribution
The present distrib... | Biology and health sciences | Gastropods | Animals |
3173663 | https://en.wikipedia.org/wiki/Plug%20flow%20reactor%20model | Plug flow reactor model | The plug flow reactor model (PFR, sometimes called continuous tubular reactor, CTR, or piston flow reactors) is a model used to describe chemical reactions in continuous, flowing systems of cylindrical geometry. The PFR model is used to predict the behavior of chemical reactors of such design, so that key reactor varia... | Physical sciences | Chemical engineering | Chemistry |
14861261 | https://en.wikipedia.org/wiki/Blurred%20vision | Blurred vision | Blurred vision is an ocular symptom where vision becomes less precise and there is added difficulty to resolve fine details.
Temporary blurred vision may involve dry eyes, eye infections, alcohol poisoning, hypoglycemia, or low blood pressure. Other medical conditions may include refractive errors such as myopia, high... | Biology and health sciences | Symptoms and signs | Health |
9028799 | https://en.wikipedia.org/wiki/Bacteria | Bacteria | Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacter... | Biology and health sciences | Biology | null |
9028960 | https://en.wikipedia.org/wiki/Load-following%20power%20plant | Load-following power plant | A load-following power plant, regarded as producing mid-merit or mid-priced electricity, is a power plant that adjusts its power output as demand for electricity fluctuates throughout the day. Load-following plants are typically in between base load and peaking power plants in efficiency, speed of start-up and shut-dow... | Technology | Concepts | null |
7500259 | https://en.wikipedia.org/wiki/Crop | Crop | A crop is a plant that can be grown and harvested extensively for profit or subsistence. In other words, a crop is a plant or plant product that is grown for a specific purpose such as food, fibre, or fuel.
When plants of the same species are cultivated in rows or other systematic arrangements, it is called crop fie... | Technology | Basics | null |
1645331 | https://en.wikipedia.org/wiki/Trigonal%20pyramidal%20molecular%20geometry | Trigonal pyramidal molecular geometry | In chemistry, a trigonal pyramid is a molecular geometry with one atom at the apex and three atoms at the corners of a trigonal base, resembling a tetrahedron (not to be confused with the tetrahedral geometry). When all three atoms at the corners are identical, the molecule belongs to point group C3v. Some molecules an... | Physical sciences | Bond structure | Chemistry |
1645870 | https://en.wikipedia.org/wiki/Ge%20%28unit%29 | Ge (unit) | The ge () is a traditional Chinese unit of volume equal to sheng. Its Korean equivalent is the hob or hop and its Japanese equivalent is the gō.
China
The ge is a traditional Chinese unit of volume equal to 10shao or sheng. Its exact value has varied over time with the size of the sheng.
In 1915, the Beiyang Governm... | Physical sciences | Volume | Basics and measurement |
1646838 | https://en.wikipedia.org/wiki/Grid%20energy%20storage | Grid energy storage | Grid energy storage, also known as large-scale energy storage, are technologies connected to the electrical power grid that store energy for later use. These systems help balance supply and demand by storing excess electricity from variable renewables such as solar and inflexible sources like nuclear power, releasing i... | Technology | Energy storage | null |
1647344 | https://en.wikipedia.org/wiki/Boron%20trifluoride | Boron trifluoride | Boron trifluoride is the inorganic compound with the formula . This pungent, colourless, and toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds.
Structure and bonding
The geometry of a molecule of is trigonal planar. Its D3h symmetry conforms w... | Physical sciences | Halide salts | Chemistry |
1647421 | https://en.wikipedia.org/wiki/Trigonal%20planar%20molecular%20geometry | Trigonal planar molecular geometry | In chemistry, trigonal planar is a molecular geometry model with one atom at the center and three atoms at the corners of an equilateral triangle, called peripheral atoms, all in one plane. In an ideal trigonal planar species, all three ligands are identical and all bond angles are 120°. Such species belong to the poin... | Physical sciences | Bond structure | Chemistry |
1648132 | https://en.wikipedia.org/wiki/Weak%20artificial%20intelligence | Weak artificial intelligence | Weak artificial intelligence (weak AI) is artificial intelligence that implements a limited part of the mind, or, as Artificial Narrow Intelligence, is focused on one narrow task.
Weak AI is contrasted with strong AI, which can be interpreted in various ways:
Artificial general intelligence (AGI): a machine with th... | Technology | Artificial intelligence concepts | null |
1648915 | https://en.wikipedia.org/wiki/Chemical%20plant | Chemical plant | A chemical plant is an industrial process plant that manufactures (or otherwise processes) chemicals, usually on a large scale. The general objective of a chemical plant is to create new material wealth via the chemical or biological transformation and or separation of materials. Chemical plants use specialized equipme... | Technology | Material and chemical | null |
5759122 | https://en.wikipedia.org/wiki/Sthenurus | Sthenurus | Sthenurus ("strong tail") is an extinct genus of kangaroos. With a length around 3 m (10 ft), some species were twice as large as modern extant species. Sthenurus was related to the better-known Procoptodon. The subfamily Sthenurinae is believed to have separated from its sister taxon, the Macropodinae (kangaroos and w... | Biology and health sciences | Diprotodontia | Animals |
11200529 | https://en.wikipedia.org/wiki/Manufacturing%20engineering | Manufacturing engineering | Manufacturing engineering or production engineering is a branch of professional engineering that shares many common concepts and ideas with other fields of engineering such as mechanical, chemical, electrical, and industrial engineering.
Manufacturing engineering requires the ability to plan the practices of manufactu... | Technology | Disciplines | null |
4321490 | https://en.wikipedia.org/wiki/Fish%20trap | Fish trap | A fish trap is a trap used for catching fish and other aquatic animals of value. Fish traps include fishing weirs, cage traps, fish wheels and some fishing net rigs such as fyke nets.
The use of traps are culturally almost universal around the world and seem to have been independently invented many times. There are tw... | Technology | Hunting and fishing | null |
4322402 | https://en.wikipedia.org/wiki/Globally%20Harmonized%20System%20of%20Classification%20and%20Labelling%20of%20Chemicals | Globally Harmonized System of Classification and Labelling of Chemicals | The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around the world. Core elements of the GHS inclu... | Physical sciences | Basics: General | Chemistry |
4325458 | https://en.wikipedia.org/wiki/Canadaspis | Canadaspis | Canadaspis ("Shield of Canada") is an extinct genus of bivalved Cambrian marine arthropod, known from North America and China. They are thought to have been benthic feeders that moved mainly by walking and possibly used its biramous appendages to stir mud in search of food. They have been placed within the Hymenocarin... | Biology and health sciences | Fossil arthropods | Animals |
4325491 | https://en.wikipedia.org/wiki/Microsoft%20Bing | Microsoft Bing | Microsoft Bing (also known simply as Bing) is a search engine owned and operated by Microsoft. The service traces its roots back to Microsoft's earlier search engines, including MSN Search, Windows Live Search, and Live Search. Bing offers a broad spectrum of search services, encompassing web, video, image, and map sea... | Technology | Search engines | null |
17720432 | https://en.wikipedia.org/wiki/Series%20%28stratigraphy%29 | Series (stratigraphy) | Series are subdivisions of rock layers based on the age of the rock and formally defined by international conventions of the geological timescale. A series is therefore a sequence of strata defining a chronostratigraphic unit. Series are subdivisions of systems and are themselves divided into stages.
Series is a term... | Physical sciences | Stratigraphy | Earth science |
17720707 | https://en.wikipedia.org/wiki/System%20%28stratigraphy%29 | System (stratigraphy) | A system in stratigraphy is a sequence of strata (rock layers) that were laid down together within the same corresponding geological period. The associated period is a chronological time unit, a part of the geological time scale, while the system is a unit of chronostratigraphy. Systems are unrelated to lithostratigrap... | Physical sciences | Stratigraphy | Earth science |
9727748 | https://en.wikipedia.org/wiki/Coral%20island | Coral island | A coral island is a type of island formed from coral detritus and associated organic material. It occurs in tropical and sub-tropical areas, typically as part of a coral reef which has grown to cover a far larger area under the sea. The term low island can be used to distinguish such islands from high islands, which a... | Physical sciences | Oceanic and coastal landforms | Earth science |
9727927 | https://en.wikipedia.org/wiki/One-way%20mirror | One-way mirror | A one-way mirror, also called two-way mirror (or one-way glass, half-silvered mirror, and semi-transparent mirror), is a reciprocal mirror that appears reflective from one side and transparent from the other. The perception of one-way transmission is achieved when one side of the mirror is brightly lit and the other si... | Technology | Optical components | null |
9734557 | https://en.wikipedia.org/wiki/MKS%20units | MKS units | The metre, kilogram, second system of units, also known more briefly as MKS units or the MKS system, is a physical system of measurement based on the metre, kilogram, and second (MKS) as base units. Distances are described in terms of metres, mass in terms of kilograms and time in seconds. Derived units are defined usi... | Physical sciences | Measurement systems | Basics and measurement |
3178674 | https://en.wikipedia.org/wiki/Day%27s%20journey | Day's journey | A day's journey in pre-modern literature, including the Bible and ancient geographers and ethnographers such as Herodotus, is a measurement of distance.
In the Bible, it is not as precisely defined as other Biblical measurements of distance; the distance has been estimated from . Judges 19 records a party of three peo... | Physical sciences | Other | Basics and measurement |
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