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49197 | https://en.wikipedia.org/wiki/Antiviral%20drug | Antiviral drug | Antiviral drugs are a class of medication used for treating viral infections. Most antivirals target specific viruses, while a broad-spectrum antiviral is effective against a wide range of viruses. Antiviral drugs are a class of antimicrobials, a larger group which also includes antibiotic (also termed antibacterial), ... | Biology and health sciences | Antiviral drugs | Health |
49256 | https://en.wikipedia.org/wiki/Age%20of%20Earth | Age of Earth | The age of Earth is estimated to be 4.54 ± 0.05 billion years This age may represent the age of Earth's accretion, or core formation, or of the material from which Earth formed. This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-... | Physical sciences | Basics | Earth science |
49281 | https://en.wikipedia.org/wiki/Hydronium | Hydronium | In chemistry, hydronium (hydroxonium in traditional British English) is the cation , also written as , the type of oxonium ion produced by protonation of water. It is often viewed as the positive ion present when an Arrhenius acid is dissolved in water, as Arrhenius acid molecules in solution give up a proton (a positi... | Physical sciences | Concepts | Chemistry |
49295 | https://en.wikipedia.org/wiki/Fine-structure%20constant | Fine-structure constant | In physics, the fine-structure constant, also known as the Sommerfeld constant, commonly denoted by (the Greek letter alpha), is a fundamental physical constant that quantifies the strength of the electromagnetic interaction between elementary charged particles.
It is a dimensionless quantity (dimensionless physical ... | Physical sciences | Physical constants | Physics |
49338 | https://en.wikipedia.org/wiki/Bipolar%20junction%20transistor | Bipolar junction transistor | A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. A bipolar transistor allows a small current injected at one of its terminals to c... | Technology | Semiconductors | null |
49373 | https://en.wikipedia.org/wiki/Grid%20computing | Grid computing | Grid computing is the use of widely distributed computer resources to reach a common goal. A computing grid can be thought of as a distributed system with non-interactive workloads that involve many files. Grid computing is distinguished from conventional high-performance computing systems such as cluster computing in ... | Technology | Computer architecture concepts | null |
49375 | https://en.wikipedia.org/wiki/Larynx | Larynx | The larynx (), commonly called the voice box, is an organ in the top of the neck involved in breathing, producing sound and protecting the trachea against food aspiration. The opening of larynx into pharynx known as the laryngeal inlet is about 4–5 centimeters in diameter. The larynx houses the vocal cords, and manipul... | Biology and health sciences | Respiratory system | Biology |
49387 | https://en.wikipedia.org/wiki/Deep%20Blue%20%28chess%20computer%29 | Deep Blue (chess computer) | Deep Blue was a chess-playing expert system run on a unique purpose-built IBM supercomputer. It was the first computer to win a game, and the first to win a match, against a reigning world champion under regular time controls. Development began in 1985 at Carnegie Mellon University under the name ChipTest. It then move... | Technology | Specific hardware | null |
49400 | https://en.wikipedia.org/wiki/Window | Window | A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame in the opening; the sash and frame are also referred... | Technology | Architectural elements | null |
49414 | https://en.wikipedia.org/wiki/Sex-determination%20system | Sex-determination system | A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two common sexes, males and females, and in other species, there are hermaphrodites, organisms that can function reproduct... | Biology and health sciences | Genetics | Biology |
49417 | https://en.wikipedia.org/wiki/Extinction | Extinction | Extinction is the termination of a taxon by the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recover. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrosp... | Biology and health sciences | Biology | null |
49420 | https://en.wikipedia.org/wiki/CMOS | CMOS | Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss
", , ) is a type of metal–oxide–semiconductor field-effect transistor (MOSFET) fabrication process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions. CMOS technology is used for constructing integrated circu... | Technology | Semiconductors | null |
49492 | https://en.wikipedia.org/wiki/Divisor | Divisor | In mathematics, a divisor of an integer also called a factor of is an integer that may be multiplied by some integer to produce In this case, one also says that is a multiple of An integer is divisible or evenly divisible by another integer if is a divisor of ; this implies dividing by leaves no remainder.
... | Mathematics | Basics | null |
49497 | https://en.wikipedia.org/wiki/Pascal%27s%20triangle | Pascal's triangle | In mathematics, Pascal's triangle is an infinite triangular array of the binomial coefficients which play a crucial role in probability theory, combinatorics, and algebra. In much of the Western world, it is named after the French mathematician Blaise Pascal, although other mathematicians studied it centuries before hi... | Mathematics | Combinatorics | null |
49547 | https://en.wikipedia.org/wiki/Hyperlink | Hyperlink | In computing, a hyperlink, or simply a link, is a digital reference to data that the user can follow or be guided to by clicking or tapping. A hyperlink points to a whole document or to a specific element within a document. Hypertext is text with hyperlinks. The text that is linked from is known as anchor text. A softw... | Technology | Internet | null |
49555 | https://en.wikipedia.org/wiki/Batholith | Batholith | A batholith () is a large mass of intrusive igneous rock (also called plutonic rock), larger than in area, that forms from cooled magma deep in the Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock types, such as granite, quartz monzonite, or diorite (see also granite dome).
Forma... | Physical sciences | Igneous rocks | Earth science |
49557 | https://en.wikipedia.org/wiki/Castle | Castle | A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars usually consider a castle to be the private fortified residence of a lord or noble. This is distinct from a mansion, palace, and villa, whose main purpose was exclusively for ... | Technology | Fortification | null |
49569 | https://en.wikipedia.org/wiki/Bayes%27%20theorem | Bayes' theorem | Bayes' theorem (alternatively Bayes' law or Bayes' rule, after Thomas Bayes) gives a mathematical rule for inverting conditional probabilities, allowing one to find the probability of a cause given its effect. For example, if the risk of developing health problems is known to increase with age, Bayes' theorem allows th... | Mathematics | Statistics and probability | null |
49571 | https://en.wikipedia.org/wiki/Bayesian%20inference | Bayesian inference | Bayesian inference ( or ) is a method of statistical inference in which Bayes' theorem is used to calculate a probability of a hypothesis, given prior evidence, and update it as more information becomes available. Fundamentally, Bayesian inference uses a prior distribution to estimate posterior probabilities. Bayesia... | Mathematics | Statistics and probability | null |
7189344 | https://en.wikipedia.org/wiki/Populus%20trichocarpa | Populus trichocarpa | Populus trichocarpa, the black cottonwood, western balsam-poplar or California poplar, is a deciduous broadleaf tree species native to western North America. It is used for timber, and is notable as a model organism in plant biology.
Description
It is a large tree, growing to a height of and a trunk diameter over ... | Biology and health sciences | Malpighiales | Plants |
2181360 | https://en.wikipedia.org/wiki/Tarski%27s%20axioms | Tarski's axioms | Tarski's axioms are an axiom system for Euclidean geometry, specifically for that portion of Euclidean geometry that is formulable in first-order logic with identity (i.e. is formulable as an elementary theory). As such, it does not require an underlying set theory. The only primitive objects of the system are "points"... | Mathematics | Axiomatic systems | null |
2183839 | https://en.wikipedia.org/wiki/Macrobrachium%20rosenbergii | Macrobrachium rosenbergii | Macrobrachium rosenbergii, also known as the giant river prawn or giant freshwater prawn, is a commercially important species of palaemonid freshwater prawn. It is found throughout the tropical and subtropical areas of the Indo-Pacific region, from India to Southeast Asia and Northern Australia. The giant freshwater pr... | Biology and health sciences | Shrimps and prawns | Animals |
2184383 | https://en.wikipedia.org/wiki/Boiling-point%20elevation | Boiling-point elevation | Boiling-point elevation is the phenomenon whereby the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent. This happens whenever a non-volatile solute, such as a salt, is added to a pure solvent, such as water. The b... | Physical sciences | Thermodynamics | Chemistry |
2184516 | https://en.wikipedia.org/wiki/Common%20ringtail%20possum | Common ringtail possum | The common ringtail possum (Pseudocheirus peregrinus, Greek for "false hand" and Latin for "pilgrim" or "alien") is an Australian marsupial.
It lives in a variety of habitats and eats a variety of leaves of both native and introduced plants, as well as flowers, fruits and sap. This possum also consumes caecotropes, wh... | Biology and health sciences | Diprotodontia | Animals |
13352174 | https://en.wikipedia.org/wiki/Quadrant%20%28instrument%29 | Quadrant (instrument) | A quadrant is an instrument used to measure angles up to 90°. Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day. Its earliest recorded usage was in ancient India in Rigvedic times by Rishi Atri to observe a solar eclipse. It was then proposed... | Technology | Navigation | null |
7032057 | https://en.wikipedia.org/wiki/Speech%E2%80%93language%20pathology | Speech–language pathology | Speech–language pathology (a.k.a. speech and language pathology or logopedics) is a healthcare and academic discipline concerning the evaluation, treatment, and prevention of communication disorders, including expressive and mixed receptive-expressive language disorders, voice disorders, speech sound disorders, speech ... | Biology and health sciences | Disabilities | Health |
3016568 | https://en.wikipedia.org/wiki/Human%20fertilization | Human fertilization | Human fertilization is the union of an egg and sperm, occurring primarily in the ampulla of the fallopian tube. The result of this union leads to the production of a fertilized egg called a zygote, initiating embryonic development. Scientists discovered the dynamics of human fertilization in the 19th century.
The proc... | Biology and health sciences | Human reproduction | Biology |
3017092 | https://en.wikipedia.org/wiki/Spin-1/2 | Spin-1/2 | In quantum mechanics, spin is an intrinsic property of all elementary particles. All known fermions, the particles that constitute ordinary matter, have a spin of . The spin number describes how many symmetrical facets a particle has in one full rotation; a spin of means that the particle must be rotated by two full t... | Physical sciences | Quantum numbers | Physics |
3019076 | https://en.wikipedia.org/wiki/Cartwheel%20Galaxy | Cartwheel Galaxy | The Cartwheel Galaxy (also known as ESO 350-40 or PGC 2248) is a lenticular ring galaxy about 500 million light-years away in the constellation Sculptor. It has a D25 isophotal diameter of , and a mass of about solar masses; its outer ring has a circular velocity of .
It was discovered by Fritz Zwicky in 1941. Zwicky... | Physical sciences | Notable galaxies | Astronomy |
3021875 | https://en.wikipedia.org/wiki/Entropy%20of%20mixing | Entropy of mixing | In thermodynamics, the entropy of mixing is the increase in the total entropy when several initially separate systems of different composition, each in a thermodynamic state of internal equilibrium, are mixed without chemical reaction by the thermodynamic operation of removal of impermeable partition(s) between them, f... | Physical sciences | Thermodynamics | Physics |
8700358 | https://en.wikipedia.org/wiki/Javelin | Javelin | A javelin is a light spear designed primarily to be thrown, historically as a ranged weapon. Today, the javelin is predominantly used for sporting purposes such as the javelin throw. The javelin is nearly always thrown by hand, unlike the sling, bow, and crossbow, which launch projectiles with the aid of a hand-held me... | Technology | Ranged weapons | null |
8702779 | https://en.wikipedia.org/wiki/Nanofiltration | Nanofiltration | Nanofiltration is a membrane filtration process that uses nanometer sized pores through which particles smaller than about 1–10 nanometers pass through the membrane. Nanofiltration membranes have pore sizes of about 1–10 nanometers, smaller than those used in microfiltration and ultrafiltration, but a slightly bigger t... | Physical sciences | Other separations | Chemistry |
5515027 | https://en.wikipedia.org/wiki/Directory%20%28computing%29 | Directory (computing) | In computing, a directory is a file system cataloging structure which contains references to other computer files, and possibly other directories. On many computers, directories are known as folders, or drawers, analogous to a workbench or the traditional office filing cabinet. The name derives from books like a teleph... | Technology | Data storage and memory | null |
585682 | https://en.wikipedia.org/wiki/Scops%20owl | Scops owl | Scops owls are typical owls in family Strigidae belonging to the genus Otus and are restricted to the Old World. Otus is the largest genus of owls with 59 species. Scops owls are colored in various brownish hues, sometimes with a lighter underside and/or face, which helps to camouflage them against the bark of trees. ... | Biology and health sciences | Strigiformes | Animals |
585732 | https://en.wikipedia.org/wiki/Radius%20%28bone%29 | Radius (bone) | The radius or radial bone (: radii or radiuses) is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna. The ulna is longer than the radius, but the radius is thicker. The radius is a long bone, pr... | Biology and health sciences | Skeletal system | Biology |
585842 | https://en.wikipedia.org/wiki/Sabot%20%28firearms%29 | Sabot (firearms) | A sabot (, ) is a supportive device used in firearm/artillery ammunitions to fit/patch around a projectile, such as a bullet/slug or a flechette-like projectile (such as a kinetic energy penetrator), and keep it aligned in the center of the barrel when fired. It allows a narrower projectile with high sectional density ... | Technology | Ammunition | null |
586353 | https://en.wikipedia.org/wiki/Tailed%20frog | Tailed frog | The tailed frogs are two species of frogs in the genus Ascaphus, the only taxon in the family Ascaphidae . The "tail" in the name is actually an extension of the male cloaca. The tail is one of two distinctive anatomical features adapting the species to life in fast-flowing streams. These are the only North American f... | Biology and health sciences | Frogs and toads | Animals |
586357 | https://en.wikipedia.org/wiki/Artificial%20general%20intelligence | Artificial general intelligence | Artificial general intelligence (AGI) is a type of artificial intelligence (AI) that matches or surpasses human cognitive capabilities across a wide range of cognitive tasks. This contrasts with narrow AI, which is limited to specific tasks. Artificial superintelligence (ASI), on the other hand, refers to AGI that grea... | Technology | Artificial intelligence concepts | null |
586727 | https://en.wikipedia.org/wiki/Alytidae | Alytidae | The Alytidae are a family of primitive frogs. Their common name is painted frogs or midwife toads. Most are endemic to Europe, but three species occur in northwest Africa, and a species formerly thought to be extinct is found in Israel.
This family is also known as Discoglossidae, but the older name Alytidae has prior... | Biology and health sciences | Frogs and toads | Animals |
588886 | https://en.wikipedia.org/wiki/Chlorate | Chlorate | Chlorate is the common name of the anion, whose chlorine atom is in the +5 oxidation state. The term can also refer to chemical compounds containing this anion, with chlorates being the salts of chloric acid. Other oxyanions of chlorine can be named "chlorate" followed by a Roman numeral in parentheses denoting the ox... | Physical sciences | Halide oxyanions | Chemistry |
589286 | https://en.wikipedia.org/wiki/Pi%20bond | Pi bond | In chemistry, pi bonds (π bonds) are covalent chemical bonds, in each of which two lobes of an orbital on one atom overlap with two lobes of an orbital on another atom, and in which this overlap occurs laterally. Each of these atomic orbitals has an electron density of zero at a shared nodal plane that passes through t... | Physical sciences | Bond structure | Chemistry |
589303 | https://en.wikipedia.org/wiki/Molecular%20orbital%20theory | Molecular orbital theory | In chemistry, molecular orbital theory (MO theory or MOT) is a method for describing the electronic structure of molecules using quantum mechanics. It was proposed early in the 20th century. The MOT explains the paramagnetic nature of O2, which valence bond theory cannot explain.
In molecular orbital theory, electrons... | Physical sciences | Molecular physics | null |
1539814 | https://en.wikipedia.org/wiki/Acanthostega | Acanthostega | Acanthostega (meaning "spiny roof") is an extinct genus of stem-tetrapod, among the first vertebrate animals to have recognizable limbs. It appeared in the late Devonian period (Famennian age) about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and those that were fully capable of ... | Biology and health sciences | Prehistoric amphibians | Animals |
1540096 | https://en.wikipedia.org/wiki/Stenopodidea | Stenopodidea | The Stenopodidea or boxer shrimps are a small group of decapod crustaceans. Often confused with Caridea shrimp or Dendrobranchiata prawns, they are neither, belonging to their own group.
Anatomy
They can be differentiated from the Dendrobranchiata prawns by their lack of branching gills, and by the fact that they broo... | Biology and health sciences | Decapoda | Animals |
1541115 | https://en.wikipedia.org/wiki/Pistonless%20rotary%20engine | Pistonless rotary engine | A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does. Designs vary widely but typically involve one or more rotors, sometimes called rotary pistons. Although many different designs have been constructed, only the Wankel engine has achieved widespre... | Technology | Engines | null |
1541301 | https://en.wikipedia.org/wiki/Lugol%27s%20iodine | Lugol's iodine | Lugol's iodine, also known as aqueous iodine and strong iodine solution, is a solution of potassium iodide with iodine in water. It is a medication and disinfectant used for a number of purposes. Taken by mouth it is used to treat thyrotoxicosis until surgery can be carried out, protect the thyroid gland from radioacti... | Physical sciences | Halide salts | Chemistry |
1543303 | https://en.wikipedia.org/wiki/Handcar | Handcar | A handcar (also known as a pump trolley, pump car, rail push trolley, push-trolley, jigger, Kalamazoo, velocipede, or draisine) is a railroad car powered by its passengers, or by people pushing the car from behind. It is mostly used as a railway maintenance of way or mining car, but it was also used for passenger servi... | Technology | Human-powered transport | null |
1545228 | https://en.wikipedia.org/wiki/Zeta%20Ophiuchi | Zeta Ophiuchi | Zeta Ophiuchi (ζ Oph, ζ Ophiuchi) is a single star located in the constellation of Ophiuchus. It has an apparent visual magnitude of 2.6, making it the third-brightest star in the constellation. Parallax measurements give an estimated distance of roughly from the Earth. It is surrounded by the Sh2-27 "Cobold" nebula, ... | Physical sciences | Notable stars | Astronomy |
1545608 | https://en.wikipedia.org/wiki/Anaerobic%20digestion | Anaerobic digestion | Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste or to produce fuels. Much of the fermentation used industrially to produce food and drink products, as well as home f... | Technology | Biotechnology | null |
1545779 | https://en.wikipedia.org/wiki/Milan%20Metro | Milan Metro | The Milan Metro () is the rapid transit system serving Milan, Italy, operated by Azienda Trasporti Milanesi. The network consists of five lines with a total network length of , and a total of 125 stations (+2 in construction), mostly underground. It has a daily ridership of about 1.4 million on weekdays.
The Milan Metr... | Technology | Italy | null |
13359661 | https://en.wikipedia.org/wiki/Mesonychidae | Mesonychidae | Mesonychidae (meaning "middle claws") is an extinct family of small to large-sized omnivorous-carnivorous mammals. They were endemic to North America and Eurasia during the Early Paleocene to the Early Oligocene, and were the earliest group of large carnivorous mammals in Asia. Once considered a sister-taxon to artiod... | Biology and health sciences | Mammals: General | Animals |
13364000 | https://en.wikipedia.org/wiki/Soil%20health | Soil health | Soil health is a state of a soil meeting its range of ecosystem functions as appropriate to its environment. In more colloquial terms, the health of soil arises from favorable interactions of all soil components (living and non-living) that belong together, as in microbiota, plants and animals. It is possible that a so... | Physical sciences | Soil science | Earth science |
161507 | https://en.wikipedia.org/wiki/Marlin | Marlin | Marlins are fish from the family Istiophoridae, which includes 11 species.
Name
The family's common name is thought to derive from their resemblance to a sailor's marlinspike.
Taxonomy
The family name Istiophoridae comes from the genus Istiophorus which first placed the species Istiophorus platypterus by George Kea... | Biology and health sciences | Acanthomorpha | null |
161804 | https://en.wikipedia.org/wiki/Africanized%20bee | Africanized bee | The Africanized bee, also known as the Africanized honey bee (AHB) and colloquially as the "killer bee", is a hybrid of the western honey bee (Apis mellifera), produced originally by crossbreeding of the East African lowland honey bee (A. m. scutellata) with various European honey bee subspecies such as the Italian hon... | Biology and health sciences | Hymenoptera | null |
161856 | https://en.wikipedia.org/wiki/Ovulation | Ovulation | Ovulation is an important part of the menstrual cycle in female vertebrates where the egg cells are released from the ovaries as part of the ovarian cycle. In female humans ovulation typically occurs near the midpoint in the menstrual cycle and after the follicular phase. Ovulation is stimulated by an increase in lutei... | Biology and health sciences | Human reproduction | Biology |
162017 | https://en.wikipedia.org/wiki/Rayon | Rayon | Rayon, also called viscose and commercialised in some countries as sabra silk or cactus silk, is a semi-synthetic fiber made from natural sources of regenerated cellulose, such as wood and related agricultural products. It has the same molecular structure as cellulose. Many types and grades of viscose fibers and films ... | Technology | Fabrics and fibers | null |
162197 | https://en.wikipedia.org/wiki/Duralumin | Duralumin | Duralumin (also called duraluminum, duraluminium, duralum, dural(l)ium, or dural) is a trade name for one of the earliest types of age-hardenable aluminium–copper alloys. The term is a combination of Düren and aluminium. Its use as a trade name is obsolete. Today the term mainly refers to aluminium-copper alloys, desig... | Physical sciences | Specific alloys | Chemistry |
162264 | https://en.wikipedia.org/wiki/Penicillium | Penicillium | Penicillium () is a genus of ascomycetous fungi that is part of the mycobiome of many species and is of major importance in the natural environment, in food spoilage, and in food and drug production.
Some members of the genus produce penicillin, a molecule that is used as an antibiotic, which kills or stops the growt... | Biology and health sciences | Basics | Plants |
162269 | https://en.wikipedia.org/wiki/Magnesium%20oxide | Magnesium oxide | Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions held together by ionic bonding. Magnesium hydroxide forms in the presence of w... | Physical sciences | Alkali oxide salts | Chemistry |
162275 | https://en.wikipedia.org/wiki/Chlamydomonas | Chlamydomonas | Chlamydomonas ( ) is a genus of green algae consisting of about 150 species of unicellular flagellates, found in stagnant water and on damp soil, in freshwater, seawater, and even in snow as "snow algae". Chlamydomonas is used as a model organism for molecular biology, especially studies of flagellar motility and chlor... | Biology and health sciences | Green algae | Plants |
162296 | https://en.wikipedia.org/wiki/Aphid | Aphid | Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white woolly aphids. A typical life cycle involves flightless females giving live birth to female nymp... | Biology and health sciences | Hemiptera (true bugs) | null |
162312 | https://en.wikipedia.org/wiki/Mechanical%20wave | Mechanical wave | In physics, a mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a material medium.
(Vacuum is, from classical perspective, a non-material medium, where electromagnetic waves propagate.)
While waves can move over long distances, the movement of the medium of transmissi... | Physical sciences | Waves | Physics |
162393 | https://en.wikipedia.org/wiki/Rin%20Tin%20Tin | Rin Tin Tin | Rin Tin Tin or Rin-Tin-Tin (September 10, 1918 – August 10, 1932) was a male German Shepherd born in Flirey, France, who became an international star in motion pictures. He was rescued from a World War I battlefield by an American soldier, Lee Duncan, who nicknamed him "Rinty". Duncan trained Rin Tin Tin and obtained s... | Biology and health sciences | Individual animals | Animals |
162404 | https://en.wikipedia.org/wiki/Stratovolcano | Stratovolcano | A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and explosive eruptions. Some have collapsed summit craters call... | Physical sciences | Volcanology | Earth science |
162498 | https://en.wikipedia.org/wiki/Nuclear%20meltdown | Nuclear meltdown | A nuclear meltdown (core meltdown, core melt accident, meltdown or partial core melt) is a severe nuclear reactor accident that results in core damage from overheating. The term nuclear meltdown is not officially defined by the International Atomic Energy Agency or by the United States Nuclear Regulatory Commission. It... | Technology | Power generation | null |
162540 | https://en.wikipedia.org/wiki/Bird-of-paradise | Bird-of-paradise | The birds-of-paradise are members of the family Paradisaeidae of the order Passeriformes. The majority of species are found in eastern Indonesia, Papua New Guinea, and eastern Australia. The family has 45 species in 17 genera. The members of this family are perhaps best known for the plumage of the males of the species... | Biology and health sciences | Corvoidea | null |
162577 | https://en.wikipedia.org/wiki/Corvidae | Corvidae | Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. In colloquial English, they are known as the crow family or corvids. Currently, 139 species are included in this family. The genus Corvus containing 50 species... | Biology and health sciences | Corvoidea | null |
162621 | https://en.wikipedia.org/wiki/Braided%20river | Braided river | A braided river (also called braided channel or braided stream) consists of a network of river channels separated by small, often temporary, islands called braid bars or, in British English usage, aits or eyots.
Braided streams tend to occur in rivers with high sediment loads or coarse grain sizes, and in rivers with ... | Physical sciences | Hydrology | Earth science |
162714 | https://en.wikipedia.org/wiki/Dust | Dust | Dust is made of fine particles of solid matter. On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution.
Dust in homes is composed of about 20–50% dead skin cells. The rest, and in offices and othe... | Physical sciences | Storms | Earth science |
162717 | https://en.wikipedia.org/wiki/Embryology | Embryology | Embryology (from Greek ἔμβρυον, embryon, "the unborn, embryo"; and -λογία, -logia) is the branch of animal biology that studies the prenatal development of gametes (sex cells), fertilization, and development of embryos and fetuses. Additionally, embryology encompasses the study of congenital disorders that occur before... | Biology and health sciences | Animal ontogeny | Biology |
162780 | https://en.wikipedia.org/wiki/Megafauna | Megafauna | In zoology, megafauna (from Greek μέγας megas "large" and Neo-Latin fauna "animal life") are large animals. The precise definition of the term varies widely, though a common threshold is approximately , with other thresholds as low as or as high as . Large body size is generally associated with other traits, such as h... | Biology and health sciences | General classifications | Animals |
162843 | https://en.wikipedia.org/wiki/Color%20television | Color television | Color television (American English) or colour television (Commonwealth English) is a television transmission technology that includes color information for the picture, so the video image can be displayed in color on the television set. It improves on the monochrome or black-and-white television technology, which displ... | Technology | Broadcasting | null |
163103 | https://en.wikipedia.org/wiki/Future | Future | The future is the time after the past and present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the apparent nature of reality and the unavoidability of the future, everything that currently exists and will exist can be categorized as either permanent, meaning that i... | Technology | Timekeeping | null |
163106 | https://en.wikipedia.org/wiki/Ethane | Ethane | Ethane ( , ) is a naturally occurring organic chemical compound with chemical formula . At standard temperature and pressure, ethane is a colorless, odorless gas. Like many hydrocarbons, ethane is isolated on an industrial scale from natural gas and as a petrochemical by-product of petroleum refining. Its chief use is... | Physical sciences | Hydrocarbons | null |
163180 | https://en.wikipedia.org/wiki/Randomized%20controlled%20trial | Randomized controlled trial | A randomized controlled trial (or randomized control trial; RCT) is a form of scientific experiment used to control factors not under direct experimental control. Examples of RCTs are clinical trials that compare the effects of drugs, surgical techniques, medical devices, diagnostic procedures, diets or other medical t... | Mathematics | Statistics and probability | null |
163389 | https://en.wikipedia.org/wiki/Diamond%20dust | Diamond dust | Diamond dust is a ground-level cloud composed of tiny ice crystals. This meteorological phenomenon is also referred to simply as ice crystals and is reported in the METAR code as IC. Diamond dust generally forms under otherwise clear or nearly clear skies, so it is sometimes referred to as clear-sky precipitation. Diam... | Physical sciences | Clouds | Earth science |
163395 | https://en.wikipedia.org/wiki/Traffic%20light | Traffic light | Traffic lights, traffic signals, or stoplights – also known as robots in South Africa, Zambia, and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic.
Traffic lights normally consist of three signals, transmitting meaningf... | Technology | Road infrastructure | null |
163423 | https://en.wikipedia.org/wiki/Amazon%20parrot | Amazon parrot | Amazon parrots are parrots in the genus Amazona. They are medium-sized, short-tailed parrots native to the Americas, with their range extending from South America to Mexico and the Caribbean. Amazona is one of the 92 genera of parrots that make up the order Psittaciformes and is in the family Psittacidae, one of three ... | Biology and health sciences | Psittaciformes | Animals |
163617 | https://en.wikipedia.org/wiki/Chicory | Chicory | Common chicory (Cichorium intybus) is a somewhat woody, perennial herbaceous plant of the family Asteraceae, usually with bright blue flowers, rarely white or pink. Native to Europe, it has been introduced to the Americas and Australia.
Many varieties are cultivated for salad leaves, chicons (blanched buds), or roots ... | Biology and health sciences | Asterales | null |
163711 | https://en.wikipedia.org/wiki/Harrow%20%28tool%29 | Harrow (tool) | In agriculture, a harrow is a farm implement used for surface tillage. It is used after ploughing for breaking up and smoothing out the surface of the soil. The purpose of harrowing is to break up clods and to provide a soil structure, called tilth, that is suitable for planting seeds. Coarser harrowing may also be us... | Technology | Agricultural tools | null |
163806 | https://en.wikipedia.org/wiki/Oil%20platform | Oil platform | An oil platform (also called an oil rig, offshore platform, oil production platform, etc.) is a large structure with facilities to extract and process petroleum and natural gas that lie in rock formations beneath the seabed. Many oil platforms will also have facilities to accommodate the workers, although it is also co... | Technology | Fuel | null |
164040 | https://en.wikipedia.org/wiki/Formula | Formula | In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a chemical formula. The informal use of the term formula in science refers to the general construct of a relationship between given quantities.
The plural of formula can be either formulas (from the most co... | Mathematics | Basics | null |
7195284 | https://en.wikipedia.org/wiki/Tropical%20cyclogenesis | Tropical cyclogenesis | Tropical cyclogenesis is the development and strengthening of a tropical cyclone in the atmosphere. The mechanisms through which tropical cyclogenesis occur are distinctly different from those through which temperate cyclogenesis occurs. Tropical cyclogenesis involves the development of a warm-core cyclone, due to sign... | Physical sciences | Storms | Earth science |
4140245 | https://en.wikipedia.org/wiki/Operation%20%28mathematics%29 | Operation (mathematics) | In mathematics, an operation is a function from a set to itself. For example, an operation on real numbers will take in real numbers and return a real number. An operation can take zero or more input values (also called "operands" or "arguments") to a well-defined output value. The number of operands is the arity of th... | Mathematics | Basics | null |
4141488 | https://en.wikipedia.org/wiki/Triflic%20acid | Triflic acid | Triflic acid, the short name for trifluoromethanesulfonic acid, TFMS, TFSA, HOTf or TfOH, is a sulfonic acid with the chemical formula CF3SO3H. It is one of the strongest known acids. Triflic acid is mainly used in research as a catalyst for esterification. It is a hygroscopic, colorless, slightly viscous liquid and i... | Physical sciences | Specific acids | Chemistry |
4142438 | https://en.wikipedia.org/wiki/Sharovipteryx | Sharovipteryx | Sharovipteryx ("Sharov's wing", known until 1981 as Podopteryx, "foot wing") is a genus of early gliding reptiles containing the single species Sharovipteryx mirabilis. It is known from a single fossil and is the only glider with a membrane surrounding the pelvis instead of the pectoral girdle. This lizard-like reptile... | Biology and health sciences | Other prehistoric reptiles | Animals |
4144876 | https://en.wikipedia.org/wiki/Longisquama | Longisquama | Longisquama is a genus of extinct reptile. There is only one species, Longisquama insignis, known from a poorly preserved skeleton and several incomplete fossil impressions from the Middle to Late Triassic Madygen Formation in Kyrgyzstan. It is known from the type fossil specimen, slab and counterslab (PIN 2548/4 and P... | Biology and health sciences | Other prehistoric reptiles | Animals |
329549 | https://en.wikipedia.org/wiki/Surface%20of%20revolution | Surface of revolution | A surface of revolution is a surface in Euclidean space created by rotating a curve (the generatrix) one full revolution around an axis of rotation (normally not intersecting the generatrix, except at its endpoints).
The volume bounded by the surface created by this revolution is the solid of revolution.
Examples of s... | Mathematics | Three-dimensional space | null |
329915 | https://en.wikipedia.org/wiki/Supercentenarian | Supercentenarian | A supercentenarian, sometimes hyphenated as super-centenarian, is a person who is 110 years or older. This age is achieved by about one in 1,000 centenarians. Supercentenarians typically live a life free of significant age-related diseases until shortly before the maximum human lifespan is reached.
Etymology
The term ... | Biology and health sciences | Fields of medicine | Health |
330091 | https://en.wikipedia.org/wiki/Rhaphidophoridae | Rhaphidophoridae | The orthopteran family Rhaphidophoridae of the suborder Ensifera has a worldwide distribution. Common names for these insects include cave crickets, camel crickets, spider crickets (sometimes shortened to "criders" or "sprickets"), and sand treaders. Those occurring in New Zealand are typically referred to as jumping o... | Biology and health sciences | Orthoptera | Animals |
330158 | https://en.wikipedia.org/wiki/Artificial%20island | Artificial island | An artificial island or man-made island is an island that has been constructed by humans rather than formed through natural processes. Other definitions may suggest that artificial islands are lands with the characteristics of human intervention in their formation process, while others argue that artificial islands are... | Physical sciences | Artificial landforms | null |
330206 | https://en.wikipedia.org/wiki/Differentiable%20function | Differentiable function | In mathematics, a differentiable function of one real variable is a function whose derivative exists at each point in its domain. In other words, the graph of a differentiable function has a non-vertical tangent line at each interior point in its domain. A differentiable function is smooth (the function is locally well... | Mathematics | Differential calculus | null |
330310 | https://en.wikipedia.org/wiki/Rank%E2%80%93nullity%20theorem | Rank–nullity theorem | The rank–nullity theorem is a theorem in linear algebra, which asserts:
the number of columns of a matrix is the sum of the rank of and the nullity of ; and
the dimension of the domain of a linear transformation is the sum of the rank of (the dimension of the image of ) and the nullity of (the dimension of the k... | Mathematics | Linear algebra | null |
330439 | https://en.wikipedia.org/wiki/Scorpaenidae | Scorpaenidae | The Scorpaenidae (also known as scorpionfish) are a family of mostly marine fish that includes many of the world's most venomous species. As their name suggests, scorpionfish have a type of "sting" in the form of sharp spines coated with venomous mucus. The family is a large one, with hundreds of members. They are wide... | Biology and health sciences | Acanthomorpha | Animals |
330981 | https://en.wikipedia.org/wiki/Tau%20%28particle%29 | Tau (particle) | The tau (), also called the tau lepton, tau particle or tauon, is an elementary particle similar to the electron, with negative electric charge and a spin of . Like the electron, the muon, and the three neutrinos, the tau is a lepton, and like all elementary particles with half-integer spin, the tau has a corresponding... | Physical sciences | Fermions | null |
330994 | https://en.wikipedia.org/wiki/Squeeze%20theorem | Squeeze theorem | In calculus, the squeeze theorem (also known as the sandwich theorem, among other names) is a theorem regarding the limit of a function that is bounded between two other functions.
The squeeze theorem is used in calculus and mathematical analysis, typically to confirm the limit of a function via comparison with two ot... | Mathematics | Real analysis | null |
331039 | https://en.wikipedia.org/wiki/Hong%20Kong%E2%80%93Zhuhai%E2%80%93Macau%20Bridge | Hong Kong–Zhuhai–Macau Bridge | The Hong Kong–Zhuhai–Macau Bridge (HZMB) is a bridge–tunnel system consisting of a series of three cable-stayed bridges, an undersea tunnel, and four artificial islands. It is both the longest sea crossing and the longest open-sea fixed link in the world. The HZMB spans the Lingding and Jiuzhou channels, connecting Ho... | Technology | Multi-modal crossings | null |
331560 | https://en.wikipedia.org/wiki/St.%20Elmo%27s%20fire | St. Elmo's fire | St. Elmo's fire (also called witchfire or witch's fire) is a weather phenomenon in which luminous plasma is created by a corona discharge from a rod-like object such as a mast, spire, chimney, or animal horn in an atmospheric electric field. It has also been observed on the leading edges of aircraft, as in the case of ... | Physical sciences | Storms | Earth science |
10881051 | https://en.wikipedia.org/wiki/Gliese%20581d | Gliese 581d | Gliese 581d (often shortened to Gl 581d or GJ 581d) is a doubtful, and frequently disputed, exoplanet candidate orbiting within the Gliese 581 system, approximately 20.4 light-years away in the Libra constellation. It was the third planet claimed in the system and the fourth (in a 4-planet model) or fifth (in a dispro... | Physical sciences | Notable exoplanets | Astronomy |
10883868 | https://en.wikipedia.org/wiki/Super-Earth | Super-Earth | A Super-Earth or super-terran or super-tellurian is a type of exoplanet with a mass higher than Earth, but substantially below those of the Solar System's ice giants, Uranus and Neptune, which are 14.5 and 17.1 times Earth's, respectively. The term "super-Earth" refers only to the mass of the planet, and so does not i... | Physical sciences | Planetary science | Astronomy |
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