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1326839 | https://en.wikipedia.org/wiki/Octodon | Octodon | Octodon is a genus of octodontid rodents native to South America, in particular in the Chilean Andes. The best-known member is the common degu, O. degus, which is kept as a pet in various countries. Two of the four species of degus are nocturnal.
Classification
This genus was first described in 1832 by the British zo... | Biology and health sciences | Rodents | Animals |
1328116 | https://en.wikipedia.org/wiki/Neutrino%20oscillation | Neutrino oscillation | Neutrino oscillation is a quantum mechanical phenomenon in which a neutrino created with a specific lepton family number ("lepton flavor": electron, muon, or tau) can later be measured to have a different lepton family number. The probability of measuring a particular flavor for a neutrino varies between three known st... | Physical sciences | Particle physics: General | Physics |
1328487 | https://en.wikipedia.org/wiki/Masai%20giraffe | Masai giraffe | The Masai giraffe (Giraffa tippelskirchi), also spelled Maasai giraffe, and sometimes called the Kilimanjaro giraffe, is a species or subspecies of giraffe. It is native to East Africa. The Masai giraffe can be found in central and southern Kenya and in Tanzania. It has distinctive jagged, irregular leaf-like blotches ... | Biology and health sciences | Giraffidae | Animals |
8485448 | https://en.wikipedia.org/wiki/Integrated%20modular%20avionics | Integrated modular avionics | Integrated modular avionics (IMA) are real-time computer network airborne systems. This network consists of a number of computing modules capable of supporting numerous applications of differing criticality levels.
In opposition to traditional federated architectures, the IMA concept proposes an integrated architectu... | Technology | Aircraft components | null |
4967925 | https://en.wikipedia.org/wiki/Mugwort | Mugwort | Mugwort is a common name for several species of aromatic flowering plants in the genus Artemisia. In Europe, mugwort most often refers to the species Artemisia vulgaris, or common mugwort. In East Asia the species Artemisia argyi is often called "Chinese mugwort" in the context of traditional Chinese medicine, Ngai Cho... | Biology and health sciences | Herbs and spices | Plants |
4968799 | https://en.wikipedia.org/wiki/Sky%20brightness | Sky brightness | Sky brightness refers to the visual perception of the sky and how it scatters and diffuses light. The fact that the sky is not completely dark at night is easily visible. If light sources (e.g. the Moon and light pollution) were removed from the night sky, only direct starlight would be visible.
The sky's brightnes... | Physical sciences | Basics | Astronomy |
4971262 | https://en.wikipedia.org/wiki/Computer%20port%20%28hardware%29 | Computer port (hardware) | A computer port is a hardware piece on a computer where an electrical connector can be plugged to link the device to external devices, such as another computer, a peripheral device or network equipment.This is a non-standard term.
Electronically, the several conductors where the port and cable contacts connect, provid... | Technology | User interface | null |
22591478 | https://en.wikipedia.org/wiki/Ring%20spinning | Ring spinning | Ring spinning is a spindle-based method of spinning fibres, such as cotton, flax or wool, to make a yarn. The ring frame developed from the throstle frame, which in its turn was a descendant of Arkwright's water frame. Ring spinning is a continuous process, unlike mule spinning which uses an intermittent action. In rin... | Technology | Spinning | null |
1951922 | https://en.wikipedia.org/wiki/Ichthyosaurus | Ichthyosaurus | Ichthyosaurus (derived from Greek () meaning 'fish' and () meaning 'lizard') is a genus of ichthyosaurs from the Early Jurassic (Hettangian - Pliensbachian) of Europe (Belgium, England, Germany and Portugal). Some specimens of the ichthyosaurid Protoichthyosaurus from England and Switzerland have been erroneously ref... | Biology and health sciences | Prehistoric marine reptiles | Animals |
1952367 | https://en.wikipedia.org/wiki/Wedge | Wedge | A wedge is a triangular shaped tool, a portable inclined plane, and one of the six simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place. It functions by converting a force applied to its blunt end into forces perpendicular (normal) to its inclin... | Technology | Basics_8 | null |
1952495 | https://en.wikipedia.org/wiki/Deinocheirus | Deinocheirus | Deinocheirus ( ) is a genus of large ornithomimosaur that lived during the Late Cretaceous around 70 million years ago. In 1965, a pair of large arms, shoulder girdles, and a few other bones of a new dinosaur were first discovered in the Nemegt Formation of Mongolia. In 1970, this specimen became the holotype of the on... | Biology and health sciences | Theropods | Animals |
1952923 | https://en.wikipedia.org/wiki/Capstan%20%28nautical%29 | Capstan (nautical) | A capstan is a vertical-axled rotating machine developed for use on sailing ships to multiply the pulling force of sailors when hauling ropes, cables, and hawsers. The principle is similar to that of the windlass, which has a horizontal axle.
History
The word, connected with the Old French capestan or cabestan(t), f... | Technology | Mechanisms | null |
1955561 | https://en.wikipedia.org/wiki/Sampling%20error | Sampling error | In statistics, sampling errors are incurred when the statistical characteristics of a population are estimated from a subset, or sample, of that population. Since the sample does not include all members of the population, statistics of the sample (often known as estimators), such as means and quartiles, generally diffe... | Mathematics | Statistics | null |
1956137 | https://en.wikipedia.org/wiki/Luminous%20blue%20variable | Luminous blue variable | Luminous blue variables (LBVs) are rare, massive and evolved stars that show unpredictable and sometimes dramatic variations in their spectra and brightness. They are also known as S Doradus variables after S Doradus, one of the brightest stars of the Large Magellanic Cloud.
Discovery and history
The LBV stars P Cygn... | Physical sciences | Stellar astronomy | Astronomy |
6531493 | https://en.wikipedia.org/wiki/Protein%20%28nutrient%29 | Protein (nutrient) | Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue and can also serve as a fuel source. As a fuel, proteins provide as much energy density as carbohydrates: 17 kJ (4 kcal) per gram; in contrast, lipids provide 37 kJ (9 kcal) per gram. The most important aspect and de... | Biology and health sciences | Biochemistry and molecular biology | null |
512443 | https://en.wikipedia.org/wiki/Moorhen | Moorhen | Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus Gallinula, Latin for "little hen."
They are close relatives of coots. They are often referred to as (black) gallinules. Recently, one of the species of Gallinula was f... | Biology and health sciences | Gruiformes | Animals |
512470 | https://en.wikipedia.org/wiki/Rubber%20band | Rubber band | A rubber band (also known as an elastic, gum band or lacky band) is a loop of rubber, usually ring or oval shaped, and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845, by Stephen Perry. Most rubber bands are manufactured out of natural rubber as well as for lat... | Technology | Containers | null |
512662 | https://en.wikipedia.org/wiki/Cardiovascular%20disease | Cardiovascular disease | Cardiovascular disease (CVD) is any disease involving the heart or blood vessels. CVDs constitute a class of diseases that includes: coronary artery diseases (e.g. angina, heart attack), heart failure, hypertensive heart disease, rheumatic heart disease, cardiomyopathy, arrhythmia, congenital heart disease, valvular he... | Biology and health sciences | Illness and injury | null |
513039 | https://en.wikipedia.org/wiki/Hypercholesterolemia | Hypercholesterolemia | Hypercholesterolemia, also called high cholesterol, is the presence of high levels of cholesterol in the blood. It is a form of hyperlipidemia (high levels of lipids in the blood), hyperlipoproteinemia (high levels of lipoproteins in the blood), and dyslipidemia (any abnormalities of lipid and lipoprotein levels in the... | Biology and health sciences | Cardiovascular disease | Health |
513093 | https://en.wikipedia.org/wiki/Monoclinic%20crystal%20system | Monoclinic crystal system | In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic system. They form a parallelogram prism. Hence two pairs of vectors are perpend... | Physical sciences | Crystallography | Physics |
513257 | https://en.wikipedia.org/wiki/Tape%20measure | Tape measure | A tape measure or measuring tape is a long, flexible ruler used to measure length or distance. It usually consists of a ribbon of cloth, plastic, fibreglass, or metal strip with linear measurement markings.
Types
Tape measures are often designed for specific uses or trades. Tapes may have different scales, be made of ... | Technology | Measuring instruments | null |
513591 | https://en.wikipedia.org/wiki/Viticulture | Viticulture | Viticulture (, "vine-growing"), viniculture (, "wine-growing"), or winegrowing is the cultivation and harvesting of grapes. It is a branch of the science of horticulture. While the native territory of Vitis vinifera, the common grape vine, ranges from Western Europe to the Persian shores of the Caspian Sea, the vine h... | Technology | Agriculture_2 | null |
513668 | https://en.wikipedia.org/wiki/Salviniales | Salviniales | The order Salviniales (formerly known as the Hydropteridales and including the former Marsileales) is an order of ferns in the class Polypodiopsida.
Description
Salviniales are all aquatic and differ from all other ferns in being heterosporous, meaning that they produce two different types of spore (megaspores and mic... | Biology and health sciences | Ferns | Plants |
513821 | https://en.wikipedia.org/wiki/5-cell | 5-cell | In geometry, the 5-cell is the convex 4-polytope with Schläfli symbol {3,3,3}. It is a 5-vertex four-dimensional object bounded by five tetrahedral cells. It is also known as a C5, hypertetrahedron, pentachoron, pentatope, pentahedroid, tetrahedral pyramid, or 4-simplex (Coxeter's polytope), the simplest possible conv... | Mathematics | Four-dimensional space | null |
513908 | https://en.wikipedia.org/wiki/Megalosaurus | Megalosaurus | Megalosaurus (meaning "great lizard", from Greek , , meaning 'big', 'tall' or 'great' and , , meaning 'lizard') is an extinct genus of large carnivorous theropod dinosaurs of the Middle Jurassic Epoch (Bathonian stage, 166 million years ago) of southern England. Although fossils from other areas have been assigned to t... | Biology and health sciences | Theropods | Animals |
513965 | https://en.wikipedia.org/wiki/Rammed%20earth | Rammed earth | Rammed earth is a technique for constructing foundations, floors, and walls using compacted natural raw materials such as earth, chalk, lime, or gravel. It is an ancient method that has been revived recently as a sustainable building method.
Under its French name of pisé it is also a material for sculptures, usually s... | Technology | Building materials | null |
514072 | https://en.wikipedia.org/wiki/Herding%20dog | Herding dog | A herding dog, also known as a stock dog or working dog, is a type of dog that either has been trained in herding livestock or belongs to one of the breeds that were developed for herding. A dog specifically trained to herd sheep is known as a sheep dog or shepherd dog, and one trained to herd cattle is known as a catt... | Biology and health sciences | Dogs | null |
514097 | https://en.wikipedia.org/wiki/Lithium%20aluminium%20hydride | Lithium aluminium hydride | Lithium aluminium hydride, commonly abbreviated to LAH, is an inorganic compound with the chemical formula or . It is a white solid, discovered by Finholt, Bond and Schlesinger in 1947. This compound is used as a reducing agent in organic synthesis, especially for the reduction of esters, carboxylic acids, and amides.... | Physical sciences | Hydride salts | Chemistry |
514203 | https://en.wikipedia.org/wiki/Collie | Collie | Collies form a distinctive type of herding dogs, including many related landraces and standardized breeds. The type originated in Scotland and Northern England. Collies are medium-sized, fairly lightly-built dogs, with pointed snouts. Many types have a distinctive white color over the shoulders. Collies are very activ... | Biology and health sciences | Dogs | Animals |
514355 | https://en.wikipedia.org/wiki/Rod%20cell | Rod cell | Rod cells are photoreceptor cells in the retina of the eye that can function in lower light better than the other type of visual photoreceptor, cone cells. Rods are usually found concentrated at the outer edges of the retina and are used in peripheral vision. On average, there are approximately 92 million rod cells (v... | Biology and health sciences | Visual system | Biology |
514402 | https://en.wikipedia.org/wiki/IUPAC%20nomenclature%20of%20organic%20chemistry | IUPAC nomenclature of organic chemistry | In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC). It is published in the Nomenclature of Organic Chemistry (informally called the Blue Book). Ideally, every possible orga... | Physical sciences | Nomenclature | Chemistry |
514458 | https://en.wikipedia.org/wiki/Wound%20healing | Wound healing | Wound healing refers to a living organism's replacement of destroyed or damaged tissue by newly produced tissue.
In undamaged skin, the epidermis (surface, epithelial layer) and dermis (deeper, connective layer) form a protective barrier against the external environment. When the barrier is broken, a regulated sequenc... | Biology and health sciences | Basics | Biology |
514493 | https://en.wikipedia.org/wiki/Sebastinae | Sebastinae | Sebastinae is a subfamily of marine fish belonging to the family Scorpaenidae in the order Scorpaeniformes. Their common names include rockfishes, rock perches, ocean perches, sea perches, thornyheads, scorpionfishes, sea ruffes and rockcods. Despite the latter name, they are not closely related to the cods in the gen... | Biology and health sciences | Acanthomorpha | Animals |
514806 | https://en.wikipedia.org/wiki/Filefish | Filefish | The filefish (Monacanthidae) are a diverse family of tropical to subtropical tetraodontiform marine fish, which are also known as foolfish, leatherjackets or shingles. They live in the Atlantic, Pacific and Indian Oceans. Filefish are closely related to triggerfish, pufferfish and trunkfish.
The filefish family compri... | Biology and health sciences | Acanthomorpha | Animals |
515339 | https://en.wikipedia.org/wiki/Zinc%20oxide | Zinc oxide | Zinc oxide is an inorganic compound with the formula . It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, paints, sunscreens, ointments, adhesives, sealants, pigmen... | Physical sciences | Oxide salts | Chemistry |
515343 | https://en.wikipedia.org/wiki/Dimetrodon | Dimetrodon | Dimetrodon ( or ; ) is an extinct genus of non-mammalian synapsid belonging to the family Sphenacodontidae that lived during the Cisuralian age of the Early Permian period, around 295–272 million years ago. With most species measuring long and weighing , the most prominent feature of Dimetrodon is the large neural spi... | Biology and health sciences | Dinosaurs and prehistoric reptiles | null |
515358 | https://en.wikipedia.org/wiki/Pelycosaur | Pelycosaur | Pelycosaur ( ) is an older term for basal or primitive Late Paleozoic synapsids, excluding the therapsids and their descendants. Previously, the term mammal-like reptile had been used, and pelycosaur was considered an order, but this is now thought to be incorrect and outdated.
Because it excludes the advanced synapsi... | Biology and health sciences | Proto-mammals | Animals |
515534 | https://en.wikipedia.org/wiki/Injury%20in%20humans | Injury in humans | An injury is any physiological damage to living tissue caused by immediate physical stress. Injuries to humans can occur intentionally or unintentionally and may be caused by blunt trauma, penetrating trauma, burning, toxic exposure, asphyxiation, or overexertion. Injuries can occur in any part of the body, and differe... | Biology and health sciences | Injury: General | Health |
27360421 | https://en.wikipedia.org/wiki/Doctor%27s%20office | Doctor's office | A doctor's office in American English, a doctor's surgery in British English, or a doctor's practice, is a medical facility in which one or more medical doctors, usually general practitioners (GP), receive and treat patients.
Description
Doctors' offices are the primary place where ambulatory care is given, and are of... | Biology and health sciences | Health facilities | Health |
13146531 | https://en.wikipedia.org/wiki/Differentiation%20of%20trigonometric%20functions | Differentiation of trigonometric functions | The differentiation of trigonometric functions is the mathematical process of finding the derivative of a trigonometric function, or its rate of change with respect to a variable. For example, the derivative of the sine function is written (a) = cos(a), meaning that the rate of change of sin(x) at a particular angle x ... | Mathematics | Differential calculus | null |
3663717 | https://en.wikipedia.org/wiki/Testudo%20%28genus%29 | Testudo (genus) | Testudo, the Mediterranean tortoises, are a genus of tortoises found in North Africa, Western Asia, and Europe. Several species are under threat in the wild, mainly from habitat destruction.
Background
They are small tortoises, ranging in length from 7.0 to 35 cm and in weight from 0.7 to 7.0 kg.
Systematics
The sys... | Biology and health sciences | Turtles | Animals |
3666151 | https://en.wikipedia.org/wiki/Mediterranean%20house%20gecko | Mediterranean house gecko | The Mediterranean house gecko (Hemidactylus turcicus) is a species of house gecko native to the Mediterranean region, from which it has spread to many parts of the world including parts of East Africa, South America, the Caribbean, and the Southern and Southeastern United States. It is commonly referred to as the Turki... | Biology and health sciences | Lizards and other Squamata | Animals |
3666650 | https://en.wikipedia.org/wiki/Duttaphrynus%20melanostictus | Duttaphrynus melanostictus | Duttaphrynus melanostictus is commonly called Asian common toad, Asian black-spined toad, Asian toad, black-spectacled toad, common Sunda toad, and Javanese toad. It is probably a complex of more than one true toad species that is widely distributed in South and Southeast Asia.
The species grows to about long. Asian ... | Biology and health sciences | Frogs and toads | Animals |
2704726 | https://en.wikipedia.org/wiki/Piri%20piri | Piri piri | Piri piri ( ), often hyphenated or as one word, and with variant spellings peri-peri () or pili pili, is a cultivar of Capsicum frutescens from the malagueta pepper. It was originally produced by Portuguese explorers in Portugal's former Southern African territories and then spread to other Portuguese domains.
Etymol... | Biology and health sciences | Botanical fruits used as culinary vegetables | Plants |
2705904 | https://en.wikipedia.org/wiki/Anthracotherium | Anthracotherium | Anthracotherium (from , 'coal' and 'beast') is an extinct genus of artiodactyls characterized by having 44 teeth, with five semi-crescentic cusps on the crowns of the upper molars. The genus ranged from the middle Eocene period until the early Miocene, having a distribution throughout Eurasia. Material subjectivel... | Biology and health sciences | Other artiodactyla | Animals |
2706031 | https://en.wikipedia.org/wiki/Bovid%20hybrid | Bovid hybrid | A bovid hybrid is the hybrid offspring of members of two different species of the bovid family. There are 143 extant species of bovid, and the widespread domestication of several species has led to an interest in hybridisation for the purpose of encouraging traits useful to humans, and to preserve declining populations... | Biology and health sciences | Hybrids | Animals |
8497971 | https://en.wikipedia.org/wiki/Military%20helicopter | Military helicopter | A military helicopter is a helicopter that is either specifically designed for or converted for usage by a military. A military helicopter's mission is a function of its design or conversion. The most common use of military helicopters is airlift, but transport helicopters can be modified or converted to perform other ... | Technology | Military aviation | null |
24104095 | https://en.wikipedia.org/wiki/Cartesian%20product | Cartesian product | In mathematics, specifically set theory, the Cartesian product of two sets and , denoted , is the set of all ordered pairs where is in and is in . In terms of set-builder notation, that is
A table can be created by taking the Cartesian product of a set of rows and a set of columns. If the Cartesian product is ta... | Mathematics | Set theory | null |
24104134 | https://en.wikipedia.org/wiki/Conditional%20probability | Conditional probability | In probability theory, conditional probability is a measure of the probability of an event occurring, given that another event (by assumption, presumption, assertion or evidence) is already known to have occurred. This particular method relies on event A occurring with some sort of relationship with another event B. In... | Mathematics | Probability | null |
24104729 | https://en.wikipedia.org/wiki/Insect%20morphology | Insect morphology | Insect morphology is the study and description of the physical form of insects. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Three physical features separate insects from other arthropods: they have a body divided into three regions (cal... | Biology and health sciences | Basic anatomy | Biology |
18841931 | https://en.wikipedia.org/wiki/Scrotum | Scrotum | In most terrestrial mammals, the scrotum (: scrotums or scrota; possibly from Latin scortum, meaning "hide" or "skin") or scrotal sac is a part of the external male genitalia located at the base of the penis. It consists of a sac of skin containing the external spermatic fascia, testicles, epididymides, and vasa defere... | Biology and health sciences | Reproductive system | Biology |
18842002 | https://en.wikipedia.org/wiki/Shampoo | Shampoo | Shampoo () is a hair care product, typically in the form of a viscous liquid, that is formulated to be used for cleaning (scalp) hair. Less commonly, it is available in solid bar format. ("Dry shampoo" is a separate product.) Shampoo is used by applying it to wet hair, massaging the product in the hair, roots and scalp... | Biology and health sciences | Hygiene products | Health |
18842022 | https://en.wikipedia.org/wiki/Thoroughbred | Thoroughbred | The Thoroughbred is a horse breed developed for horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed. Thoroughbreds are considered "hot-blooded" horses that are known for their agility, speed, and spirit.
The Thorou... | Biology and health sciences | Horses | null |
18842168 | https://en.wikipedia.org/wiki/Semen | Semen | Semen, also known as seminal fluid, is a bodily fluid that contains spermatozoa. Spermatozoa are secreted by the male gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the female ovum. In placental mammals, semen also contains secretions from the male accessory glands an... | Biology and health sciences | Animal reproduction | null |
18842281 | https://en.wikipedia.org/wiki/Computer%20keyboard | Computer keyboard | A computer keyboard is a built-in or peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter-style keyboards have been the main inpu... | Technology | User interface | null |
18842299 | https://en.wikipedia.org/wiki/Pond | Pond | A pond is a small, still, land-based body of water formed by pooling inside a depression, either naturally or artificially. A pond is smaller than a lake and there are no official criteria distinguishing the two, although defining a pond to be less than in area, less than in depth and with less than 30% of its area c... | Physical sciences | Hydrology | null |
18842308 | https://en.wikipedia.org/wiki/Stream | Stream | A stream is a continuous body of surface water flowing within the bed and banks of a channel. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long, large streams are usually called rivers, while smaller, less voluminous and more intermittent str... | Physical sciences | Hydrology | Earth science |
18842323 | https://en.wikipedia.org/wiki/Sea | Sea | A sea is a large body of salt water. There are particular seas and the sea. The sea commonly refers to the ocean, the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. the Mediterranean Sea), or certain large, nearly landl... | Physical sciences | Geography | null |
18842359 | https://en.wikipedia.org/wiki/Ocean | Ocean | The ocean is the body of salt water that covers approximately 70.8% of Earth. In English, the term ocean also refers to any of the large bodies of water into which the world ocean is conventionally divided. The following names describe five different areas of the ocean: Pacific, Atlantic, Indian, Antarctic/Southern, an... | Physical sciences | Hydrological features | null |
18842395 | https://en.wikipedia.org/wiki/River | River | A river is a natural freshwater stream that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the wate... | Physical sciences | Hydrological features | null |
18842431 | https://en.wikipedia.org/wiki/Lake | Lake | A lake is an often naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from the ocean, although they may be connected with the ocean by rivers. Lakes, as wi... | Physical sciences | Hydrological features | null |
864017 | https://en.wikipedia.org/wiki/Planetary%20core | Planetary core | A planetary core consists of the innermost layers of a planet. Cores may be entirely liquid, or a mixture of solid and liquid layers as is the case in the Earth. In the Solar System, core sizes range from about 20% (the Moon) to 85% of a planet's radius (Mercury).
Gas giants also have cores, though the composition of ... | Physical sciences | Planetary science | Astronomy |
864424 | https://en.wikipedia.org/wiki/Sombrero%20Galaxy | Sombrero Galaxy | The Sombrero Galaxy (also known as Messier Object 104, M104 or NGC 4594) is a peculiar galaxy of unclear classification in the constellation borders of Virgo and Corvus, being about from the Milky Way galaxy. It is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern e... | Physical sciences | Notable galaxies | Astronomy |
864847 | https://en.wikipedia.org/wiki/Azure%20%28color%29 | Azure (color) | Azure ( , ) is the color between cyan and blue on the spectrum of visible light. It is often described as the color of the sky on a clear day.
On the RGB color wheel, "azure" (hexadecimal #0080FF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to crea... | Physical sciences | Colors | Physics |
865481 | https://en.wikipedia.org/wiki/Spermophilus | Spermophilus | Spermophilus is a genus of ground squirrels in the squirrel family. As traditionally defined the genus was very species-rich, ranging through Europe, Asia and North America, but this arrangement was found to be paraphyletic to the certainly distinct prairie dogs, marmots, and antelope squirrels. As a consequence, all t... | Biology and health sciences | Rodents | Animals |
866065 | https://en.wikipedia.org/wiki/UEFI | UEFI | Unified Extensible Firmware Interface (UEFI, or as an acronym) is a specification for the firmware architecture of a computing platform. When a computer is powered on, the UEFI-implementation is typically the first that runs, before starting the operating system. Examples include AMI Aptio, Phoenix SecureCore, TianoCo... | Technology | Computer hardware | null |
866377 | https://en.wikipedia.org/wiki/Bacillus%20subtilis | Bacillus subtilis | Bacillus subtilis (), known also as the hay bacillus or grass bacillus, is a gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants, humans and marine sponges. As a member of the genus Bacillus, B. subtilis is rod-shaped, and can form a tough, protective endospore, allowin... | Biology and health sciences | Gram-positive bacteria | Plants |
866698 | https://en.wikipedia.org/wiki/Teal | Teal | Teal is a greenish-blue color. Its name comes from that of a bird—the Eurasian teal (Anas crecca)—which presents a similarly colored stripe on its head. The word is often used colloquially to refer to shades of cyan in general.
It can be created by mixing cyan into a green base, or deepened as needed with black or gra... | Physical sciences | Colors | Physics |
1330507 | https://en.wikipedia.org/wiki/Reedfish | Reedfish | The reedfish, ropefish (more commonly used in the United States), or snakefish, Erpetoichthys calabaricus, is a species of fish in the family Polypteridae alongside the bichirs. It is the only member of the genus Erpetoichthys. It is native to fresh and brackish waters in West and Central Africa. The reedfish possesses... | Biology and health sciences | Polypteriformes | Animals |
1331789 | https://en.wikipedia.org/wiki/Lepton%20number | Lepton number | In particle physics, lepton number (historically also called lepton charge)
is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction.
Lepton number is an additive quantum number, so its sum is preserved in interactions (as o... | Physical sciences | Quantum numbers | Physics |
1333270 | https://en.wikipedia.org/wiki/Cetraria%20islandica | Cetraria islandica | Cetraria islandica, also known as true Iceland lichen or Iceland moss, is an Arctic-alpine lichen whose erect or upright, leaflike habit gives it the appearance of a moss, where its name likely comes from.
Description
It is often of a pale chestnut color, but varies considerably, being sometimes almost entirely grayi... | Biology and health sciences | Lichens | Plants |
1334076 | https://en.wikipedia.org/wiki/Interplate%20earthquake | Interplate earthquake | An interplate earthquake occurs at the boundary between two tectonic plates. Earthquakes of this type account for more than 90 percent of the total seismic energy released around the world. If one plate is trying to move past the other, they will be locked until sufficient stress builds up to cause the plates to slip r... | Physical sciences | Seismology | Earth science |
1334113 | https://en.wikipedia.org/wiki/Body%20armor | Body armor | Body armor, personal armor (also spelled armour), armored suit (armoured) or coat of armor, among others, is armor for a person's body: protective clothing or close-fitting hands-free shields designed to absorb or deflect physical attacks. Historically used to protect military personnel, today it is also used by vario... | Technology | Armour | null |
1334312 | https://en.wikipedia.org/wiki/Megathrust%20earthquake | Megathrust earthquake | Megathrust earthquakes occur at convergent plate boundaries, where one tectonic plate is forced underneath another. The earthquakes are caused by slip along the thrust fault that forms the contact between the two plates. These interplate earthquakes are the planet's most powerful, with moment magnitudes (Mw) that can e... | Physical sciences | Seismology | Earth science |
26998458 | https://en.wikipedia.org/wiki/Manure | Manure | Manure is organic matter that is used as organic fertilizer in agriculture. Most manure consists of animal feces; other sources include compost and green manure. Manures contribute to the fertility of soil by adding organic matter and nutrients, such as nitrogen, that are utilised by bacteria, fungi and other organisms... | Technology | Agronomical techniques | null |
26998617 | https://en.wikipedia.org/wiki/Field%20%28physics%29 | Field (physics) | In science, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time. An example of a scalar field is a weather map, with the surface temperature described by assigning a number to each point on the map. A surface wind map, assigning an arrow to each ... | Physical sciences | Basics_6 | null |
6534970 | https://en.wikipedia.org/wiki/Chrysalidocarpus%20lutescens | Chrysalidocarpus lutescens | Chrysalidocarpus lutescens, also known by its synonym Dypsis lutescens and as golden cane palm, areca palm, yellow palm, butterfly palm, or bamboo palm, is a species of flowering plant in the family Arecaceae, native to Madagascar and naturalized in the Andaman Islands, Thailand, Vietnam, Réunion, El Salvador, Cuba, Pu... | Biology and health sciences | Arecales (inc. Palms) | Plants |
6541883 | https://en.wikipedia.org/wiki/Fishing%20float | Fishing float | A fishing float or bobber is a lightweight buoy used in angling, usually attached to a fishing line. Angling using a float is sometimes called float fishing.
A float can serve several purposes:
firstly, it serves as a visual bite indicator that helps the angler assess underwater status of the baited hook and decide w... | Technology | Hunting and fishing | null |
21124968 | https://en.wikipedia.org/wiki/Lifeboat%20%28rescue%29 | Lifeboat (rescue) | A rescue lifeboat is a boat rescue craft which is used to attend a vessel in distress, or its survivors, to rescue crew and passengers. It can be hand pulled, sail powered or powered by an engine. Lifeboats may be rigid, inflatable or rigid-inflatable combination-hulled vessels.
Overview
There are generally three type... | Technology | Naval transport | null |
143320 | https://en.wikipedia.org/wiki/PCI%20Express | PCI Express | PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe or PCI-E, is a high-speed serial computer expansion bus standard, meant to replace the older PCI, PCI-X and AGP bus standards. It is the common motherboard interface for personal computers' graphics cards, capture cards, sound cards... | Technology | Computer hardware | null |
143335 | https://en.wikipedia.org/wiki/Celestial%20navigation | Celestial navigation | Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the surface of the Earth without relying solely on estimated positional calculations, comm... | Technology | Navigation | null |
143357 | https://en.wikipedia.org/wiki/Medical%20ultrasound | Medical ultrasound | Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics... | Technology | Imaging | null |
143410 | https://en.wikipedia.org/wiki/Umbra%2C%20penumbra%20and%20antumbra | Umbra, penumbra and antumbra | The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object. Assuming no diffraction, for a collimated beam (such as a point source) of light, only the umbra is cast.
These names are most often used for the shadows cast by celestial bodies, tho... | Physical sciences | Celestial mechanics | Astronomy |
143431 | https://en.wikipedia.org/wiki/Stereographic%20projection | Stereographic projection | In mathematics, a stereographic projection is a perspective projection of the sphere, through a specific point on the sphere (the pole or center of projection), onto a plane (the projection plane) perpendicular to the diameter through the point. It is a smooth, bijective function from the entire sphere except the cente... | Mathematics | Non-Euclidean geometry | null |
143471 | https://en.wikipedia.org/wiki/Tuber | Tuber | Tubers are a type of enlarged structure that plants use as storage organs for nutrients, derived from stems or roots. Tubers help plants perennate (survive winter or dry months), provide energy and nutrients, and are a means of asexual reproduction.
Stem tubers manifest as thickened rhizomes (underground stems) or sto... | Biology and health sciences | Plant anatomy and morphology: General | Biology |
143494 | https://en.wikipedia.org/wiki/Indira%20Gandhi%20International%20Airport | Indira Gandhi International Airport | Indira Gandhi International Airport is the primary international airport serving New Delhi, the capital of India, and the National Capital Region (NCR). The airport, spread over an area of , is situated in Palam, Delhi, southwest of the New Delhi Railway Station and from New Delhi city centre.
Named after Indira Ga... | Technology | Asia | null |
143540 | https://en.wikipedia.org/wiki/Poinsettia | Poinsettia | The poinsettia (; Euphorbia pulcherrima) is a commercially important flowering plant species of the diverse spurge family Euphorbiaceae. Indigenous to Mexico and Central America, the poinsettia was first described by Europeans in 1834. It is particularly well known for its red and green foliage and is widely used in Ch... | Biology and health sciences | Malpighiales | null |
143803 | https://en.wikipedia.org/wiki/Tears | Tears | Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals. Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. The different types of tears—basal, reflex, and emotional—vary significantly in composition.
The ... | Biology and health sciences | Visual system | Biology |
143847 | https://en.wikipedia.org/wiki/Pudu | Pudu | The pudus (Mapudungun püdü or püdu, , ) are two species of South American deer from the genus Pudu, and are the world's smallest deer. The chevrotains (mouse-deer; Tragulidae) are smaller, but they are not true deer. The name is a loanword from Mapudungun, the language of the indigenous Mapuche people of central Chile ... | Biology and health sciences | Deer | Animals |
143912 | https://en.wikipedia.org/wiki/Reindeer | Reindeer | The reindeer or caribou (Rangifer tarandus) is a species of deer with circumpolar distribution, native to Arctic, subarctic, tundra, boreal, and mountainous regions of Northern Europe, Siberia, and North America. It is the only representative of the genus Rangifer. More recent studies suggest the splitting of reindeer ... | Biology and health sciences | Artiodactyla | null |
144056 | https://en.wikipedia.org/wiki/Fluorescent%20lamp | Fluorescent lamp | A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow. Fluorescent lamps convert electrical energy into useful ... | Technology | Lighting | null |
144147 | https://en.wikipedia.org/wiki/Miscarriage | Miscarriage | Miscarriage, also known in medical terms as a spontaneous abortion, is an end to pregnancy resulting in the loss and expulsion of an embryo or fetus from the womb before it can survive independently. Miscarriage before 6 weeks of gestation is defined as biochemical loss by ESHRE. Once ultrasound or histological evidenc... | Biology and health sciences | Human reproduction | Biology |
144156 | https://en.wikipedia.org/wiki/Mussel | Mussel | Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.
The word "mussel" is frequently ... | Biology and health sciences | Mollusks | null |
144192 | https://en.wikipedia.org/wiki/Koko%20%28gorilla%29 | Koko (gorilla) | Hanabiko, nicknamed "Koko" (July 4, 1971 – June 19, 2018) was a female western lowland gorilla born in the San Francisco Zoo and cross-fostered by Francine Patterson for use in ape language experiments. Koko gained public attention as the subject of two National Geographic cover stories and, in 1980, the best-selling c... | Biology and health sciences | Individual animals | Animals |
144219 | https://en.wikipedia.org/wiki/Wildlife | Wildlife | Wildlife refers to undomesticated animals and uncultivated plant species which can exist in their natural habitat, but has come to include all organisms that grow or live wild in an area without being introduced by humans. Wildlife was also synonymous to game: those birds and mammals that were hunted for sport. Wildlif... | Biology and health sciences | Ecology | Biology |
144355 | https://en.wikipedia.org/wiki/Galliformes | Galliformes | Galliformes is an order of heavy-bodied ground-feeding birds that includes turkeys, chickens, quail, and other landfowl. Gallinaceous birds, as they are called, are important in their ecosystems as seed dispersers and predators, and are often reared by humans for their meat and eggs, or hunted as game birds.
The orde... | Biology and health sciences | Galliformes | null |
144386 | https://en.wikipedia.org/wiki/Voyager%20Golden%20Record | Voyager Golden Record | The Voyager Golden Records are two identical phonograph records which were included aboard the two Voyager spacecraft launched in 1977. The records contain sounds and data to reconstruct raster scan images selected to portray the diversity of life and culture on Earth, and are intended for any intelligent extraterrestr... | Technology | Unmanned spacecraft | null |
144417 | https://en.wikipedia.org/wiki/Comoving%20and%20proper%20distances | Comoving and proper distances | In standard cosmology, comoving distance and proper distance (or physical distance) are two closely related distance measures used by cosmologists to define distances between objects. Comoving distance factors out the expansion of the universe, giving a distance that does not change in time except due to local factors,... | Physical sciences | Physical cosmology | Astronomy |
144428 | https://en.wikipedia.org/wiki/Degenerate%20matter | Degenerate matter | Degenerate matter occurs when the Pauli exclusion principle significantly alters a state of matter at low temperature. The term is used in astrophysics to refer to dense stellar objects such as white dwarfs and neutron stars, where thermal pressure alone is not enough to prevent gravitational collapse. The term also ap... | Physical sciences | States of matter | null |
144551 | https://en.wikipedia.org/wiki/Knapping | Knapping | Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration. The original Germanic term knopp meant to s... | Technology | Materials | null |
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