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Portal de ciencia
La ciencia (de lapalabra latina scientia , que significa "conocimiento") es una empresa sistemática que construye y organiza el conocimiento en forma de explicaciones y predicciones comprobables sobre el universo .
Las primeras raíces de la ciencia se remontan al Antiguo Egipto y Mesopotamia alrededor de 3000 a 1200 a. C. Sus contribuciones a las matemáticas , la astronomía y la medicina entraron y dieron forma a la filosofía natural griega de la antigüedad clásica , mediante la cual se hicieron intentos formales para proporcionar explicaciones de los eventos en el mundo físico basadas en causas naturales. Después de la caída del Imperio Romano Occidental , el conocimiento de las concepciones griegas del mundo se deterioró en Europa Occidental durante los primeros siglos (400 a 1000 d.C.) de la Edad Media., pero se conservó en el mundo musulmán durante la Edad de Oro islámica . La recuperación y asimilación de las obras griegas y las investigaciones islámicas en Europa occidental desde el siglo X al XIII revivieron la " filosofía natural ", que luego fue transformada por la Revolución Científica que comenzó en el siglo XVI cuando nuevas ideas y descubrimientos partieron de las concepciones griegas anteriores y tradiciones. El método científico pronto jugó un papel más importante en la creación de conocimiento y no fue hasta el siglo 19 que muchos de lo institucional y profesionallas características de la ciencia comenzaron a tomar forma; junto con el cambio de "filosofía natural" a "ciencia natural".
La ciencia moderna se divide típicamente en tres ramas principales que consisten en las ciencias naturales (por ejemplo, biología , química y física ), que estudian la naturaleza en el sentido más amplio; las ciencias sociales (por ejemplo, economía , psicología y sociología ), que estudian a los individuos y las sociedades; y las ciencias formales (p. ej., lógica , matemáticas e informática teórica), que estudian conceptos abstractos. Sin embargo, existe un desacuerdo sobre si las ciencias formales realmente constituyen una ciencia, ya que no se basan en pruebas empíricas . Las disciplinas que utilizan el conocimiento científico existente con fines prácticos, como la ingeniería y la medicina, se describen como ciencias aplicadas .
La ciencia se basa en la investigación , que comúnmente es realizada por científicos que trabajan en instituciones académicas y de investigación , agencias gubernamentales y empresas . El impacto práctico de la investigación científica ha llevado al surgimiento de políticas científicas que buscan influir en la empresa científica priorizando el desarrollo de productos comerciales , armamentos , atención médica , infraestructura pública y protección ambiental . ( Artículo completo ... )
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El petrel de tormenta europeo , el petrel de tormenta británico o simplemente el petrel de tormenta ( Hydrobates pelagicus ) es un ave marina de la familia del petrel de tormenta del norte , Hydrobatidae. Es el único miembro del género Hydrobates . El pequeño pájaro de cola cuadrada es completamente negro excepto por una rabadilla ancha y blanca y una banda blanca en las alas inferiores, y tiene un vuelo de murciélago que se agita. La gran mayoría de la población se reproduce en islas frente a las costas de Europa, con el mayor número en las Islas Feroe., Reino Unido, Irlanda e Islandia. La población mediterránea es una subespecie separada, pero es inseparable en el mar de sus parientes atlánticos; sus bastiones son la isla Filfla (Malta), Sicilia y las Islas Baleares .
El petrel de tormenta anida en grietas y madrigueras, a veces compartidas con otras aves marinas o conejos, y pone un solo huevo blanco, generalmente en suelo desnudo. Los adultos comparten la incubación prolongada y ambos alimentan al polluelo, que normalmente no se cría después de la primera semana. Esta ave es fuertemente migratoria , pasando por el hemisferio norteinvierno principalmente frente a las costas de Sudáfrica y Namibia, con algunas aves parando en los mares contiguos a África occidental, y algunas permanecen cerca de sus islas de reproducción mediterráneas. Este petrel es estrictamente oceánico fuera de la temporada de cría. Se alimenta de peces pequeños, calamares y zooplancton , mientras golpea la superficie del mar, y puede encontrar elementos comestibles aceitosos por olor. La comida se convierte en el estómago del ave en un líquido anaranjado aceitoso, que regurgita cuando se alimenta al polluelo. Aunque generalmente está en silencio en el mar, el petrel tormentoso tiene un canto parloteador dado por ambos miembros de una pareja en su vuelo de cortejo, y el macho tiene un canto ronroneante emitido desde la cámara de cría. ( Artículo completo ... )- P. cyrtocristatus skeletal mount at the Field Museum of Natural History.
Parasaurolophus (/ˌpærəsɔːˈrɒləfəs, -ˌsɔːrəˈloʊfəs/; meaning "near crested lizard" in reference to Saurolophus) is a genus of herbivorous ornithopod dinosaur that lived in what is now North America and possibly Asia during the Late Cretaceous Period, about 76.5–73 million years ago. It was an herbivore that walked both as a biped and as a quadruped. Three species are universally recognized: P. walkeri (the type species), P. tubicen, and the short-crested P. cyrtocristatus. Additionally, a fourth species, P. jiayensis, has been proposed, although it is more commonly placed in the separate genus Charonosaurus. Remains are known from Alberta (Canada), New Mexico and Utah (United States), and possibly Heilongjiang, (China). The genus was first described in 1922 by William Parks from a skull and partial skeleton found in Alberta.
Parasaurolophus was a hadrosaurid, part of a diverse family of Cretaceous dinosaurs known for their range of bizarre head adornments. This genus is known for its large, elaborate cranial crest, which at its largest forms a long curved tube projecting upwards and back from the skull. Charonosaurus from China, which may have been its closest relative, had a similar skull and potentially a similar crest. Visual recognition of both species and sex, acoustic resonance, and thermoregulation have been proposed as functional explanations for the crest. It is one of the rarer hadrosaurids, known from only a handful of good specimens. (Full article...) - Banksia canei inflorescence
Banksia canei, commonly known as the mountain banksia, is a species of shrub that is endemic to southeastern Australia. It is generally encountered as a many-branched shrub that grows up to 3 m (10 ft) high, with narrow leaves and the yellow inflorescences (flower spikes) appearing from late summer to early winter. The old flowers fall off the spikes, and up to 150 finely furred follicles develop, which remain closed until burnt in a bushfire. Each follicle bears two winged seeds. Response to fire is poorly known, although it is thought to regenerate by seed. Birds such as the yellow-tufted honeyeater and various insects forage among the flower spikes. It is frost tolerant in cultivation, but copes less well with aridity or humidity, and is often short-lived in gardens. One cultivar, Banksia 'Celia Rosser', was registered in 1978, but has subsequently vanished.
Although no subspecies are recognised, four topodemes (geographically isolated populations) have been described, as there is significant variation in the shape of both adult and juvenile leaves between populations. Although superficially resembling B. marginata, it is more closely related to another subalpine species, B. saxicola. (Full article...)
The 1867 Manhattan earthquake struck Riley County, Kansas, in the United States on April 24, 1867 at 20:22 UTC, or about 14:30 local time. The strongest earthquake to originate in the state, it measured 5.1 on a seismic scale that is based on an isoseismal map or the event's felt area. The earthquake's epicenter was near the town of Manhattan.
The earthquake had a maximum perceived intensity of VII (Very strong) on the Mercalli intensity scale. It caused minor damage, reports of which were confined to Kansas, Iowa, and Missouri, according to the United States Geological Survey. Felt over an area of 200,000 square miles (520,000 km2), the earthquake reached the states of Indiana, Illinois, and possibly Ohio, though the latter reports have been questioned. (Full article...)- Composite photo of the mounted holotype skeleton shortly before display in 1905
Cetiosauriscus (/ˌsiːtioʊˈsɔːrɪskəs/ SEE-tee-oh-SOR-iss-kəs) is a genus of sauropod dinosaur that lived between 166 and 164 million years ago during the Callovian (Middle Jurassic Period) in what is now England. A herbivore, Cetiosauriscus had — by sauropod standards — a moderately long tail, and longer forelimbs, making them as long as its hindlimbs. It has been estimated as about 15 m (49 ft) long and between 4 and 10 t (3.9 and 9.8 long tons; 4.4 and 11.0 short tons) in weight.
The only known fossil includes most of the rear half of a skeleton as well as a hindlimb (NHMUK R3078). Found in Cambridgeshire in the 1890s, it was described by Arthur Smith Woodward in 1905 as a new specimen of the species Cetiosaurus leedsi. This was changed in 1927, when Friedrich von Huene found NHMUK R3078 and the C. leedsi type specimen to be too different from Cetiosaurus, warranting its own genus, which he named Cetiosauriscus, meaning "Cetiosaurus-like". Cetiosauriscus leedsi was referred to the sauropod family Diplodocidae because of similarities in the tail and foot, and had the dubious or indeterminate species "Cetiosauriscus" greppini, "C." longus, and "C." glymptonensis assigned to it. In 1980, Alan Charig named a new species of Cetiosauriscus for NHMUK R3078 because of the lack of comparable material to the type of C. leedsi; this species was named Cetiosauriscus stewarti. Because of the poor state of preservation of the Cetiosauriscus leedsi fossil, Charig sent a petition to the International Commission on Zoological Nomenclature to instead make C. stewarti the type species. Cetiosauriscus stewarti became the oldest confirmed diplodocid until a phylogenetic analysis published in 2003 instead found the species to belong to Mamenchisauridae, and followed by studies in 2005 and 2015 that found it outside Neosauropoda, while not a mamenchisaurid proper. (Full article...) - Georges Gilles de la Tourette (1857–1904), namesake of Tourette syndrome
Tourette syndrome or Tourette's syndrome (abbreviated as TS or Tourette's) is a common neurodevelopmental disorder that begins in childhood or adolescence. It is characterized by multiple movement (motor) tics and at least one vocal (phonic) tic. Common tics are blinking, coughing, throat clearing, sniffing, and facial movements. These are typically preceded by an unwanted urge or sensation in the affected muscles, can sometimes be suppressed temporarily, and characteristically change in location, strength, and frequency. Tourette's is at the more severe end of a spectrum of tic disorders. The tics often go unnoticed by casual observers.
Tourette's was once regarded as a rare and bizarre syndrome and has popularly been associated with coprolalia (the utterance of obscene words or socially inappropriate and derogatory remarks). It is no longer considered rare; about 1% of school-age children and adolescents are estimated to have Tourette's, and coprolalia occurs only in a minority. There are no specific tests for diagnosing Tourette's; it is not always correctly identified, because most cases are mild, and the severity of tics decreases for most children as they pass through adolescence. Therefore, many go undiagnosed or may never seek medical attention. Extreme Tourette's in adulthood, though sensationalized in the media, is rare, but for a small minority, severely debilitating tics can persist into adulthood. Tourette's does not affect intelligence or life expectancy. (Full article...)
Cerro Azul (Spanish pronunciation: [ˈsero aˈsul], blue hill in Spanish), sometimes referred to as Quizapu, is an active stratovolcano in the Maule Region of central Chile, immediately south of Descabezado Grande. Part of the South Volcanic Zone of the Andes, its summit is 3,788 meters (12,428 ft) above sea level, and is capped by a summit crater that is 500 meters (1,600 ft) wide and opens to the north. Beneath the summit, the volcano features numerous scoria cones and flank vents.
Cerro Azul is responsible for several of South America's largest recorded eruptions, in 1846 and 1932. In 1846, an effusive eruption formed the vent at the site of present-day Quizapu crater on the northern flank of Cerro Azul and sent lava flowing down the sides of the volcano, creating a lava field 8–9 square kilometres (3–3.5 square miles) in area. Phreatic and Strombolian volcanism between 1907 and 1932 excavated this crater. In 1932, one of the largest explosive eruptions of the 20th century occurred at Quizapu Crater and sent 9.5 cubic kilometers (2.3 cu mi) of ash into the atmosphere. The volcano's most recent eruption was in 1967. (Full article...)
The golden-crowned sifaka or Tattersall's sifaka (Propithecus tattersalli) is a medium-sized lemur characterized by mostly white fur, prominent furry ears, and a golden-orange crown. It is one of the smallest sifakas (genus Propithecus), weighing around 3.5 kg (7.7 lb) and measuring approximately 90 cm (35 in) from head to tail. Like all sifakas, it is a vertical clinger and leaper, and its diet includes mostly seeds and leaves. The golden-crowned sifaka is named after its discoverer, Ian Tattersall, who first spotted the species in 1974. However, it was not formally described until 1988, after a research team led by Elwyn L. Simons observed and captured some specimens for captive breeding. The golden-crowned sifaka most closely resembles the western forest sifakas of the P. verreauxi group, yet its karyotype suggests a closer relationship with the P. diadema group of eastern forest sifakas. Despite the similarities with both groups, more recent studies of its karyotype support its classification as a distinct species.
Found in gallery, deciduous, and semi-evergreen forest, its restricted range includes 44 forest fragments, totaling an area of 44,125 hectares (109,040 acres; 170.37 sq mi), centered on the town of Daraina in northeast Madagascar. Its estimated population is 18,000 individuals. It is primarily active during the day, although it also tends to be active at dawn and dusk during the rainy season. It sleeps in tall emergent trees and is preyed upon by the fossa. The golden-crowned sifaka lives in groups of around five to six individuals, containing a balanced number of adult males and females. Scent is used to mark territories, which are defended by growling, chasing, and ritualistic leaping displays. Reproduction is seasonal, with gestation lasting six months and lactation lasting five months. Infants are weaned during the wet season to ensure the best chances of survival. (Full article...)
Epacris impressa, also known as common heath, is a plant of the heath family, Ericaceae, that is native to southeast Australia (the states of Victoria, Tasmania, South Australia and New South Wales). French botanist Jacques Labillardière collected the species in 1793 and described it in 1805. Four forms have been identified, but no subspecies are recognised. Growing in heathland, shrubland or open forest, it is generally a small shrub around 0.5 to 1 m (1 ft 8 in to 3 ft 3 in) tall, with small stiff leaves. The red, pink or white tube-like flowers appear from late autumn to early spring. Honeyeater birds, particularly the eastern spinebill, feed upon the nectar of the flowers. It regenerates after bushfire by seed or by resprouting.
A highly regarded garden plant, the common heath was first cultivated in England in 1825; over seventy named cultivars have been developed, most of which have now vanished. A pink-flowered form, often referred to as "pink heath", is the floral emblem of the state of Victoria. Epacris impressa has proven a difficult plant to propagate reliably, which has limited its use in horticulture and revegetation. It grows best in well-drained but moist soil in a semishaded position. (Full article...)
Typhoon Pongsona was the last typhoon of the 2002 Pacific typhoon season, and was the second costliest United States disaster in 2002, only behind Hurricane Lili. The name "Pongsona" was contributed by North Korea for the Pacific tropical cyclone list and is the Korean name for the garden balsam. Pongsona developed out of an area of disturbed weather on December 2, and steadily intensified to reach typhoon status on December 5. On December 8 it passed through Guam and the Northern Mariana Islands while near its peak winds of 175 km/h (110 mph 10-min). It ultimately turned to the northeast, weakened, and became extratropical on December 11.
Typhoon Pongsona produced strong wind gusts peaking at 290 km/h (183 mph 1-min), which left the entire island of Guam without power and destroyed about 1,300 houses. With strong building standards and experience from repeated typhoon strikes, there were no fatalities directly related to Pongsona, although there was one indirect death from flying glass. Damage on the island totaled over $730 million (2002 USD, $1.04 billion 2021 USD), making Pongsona among the five costliest typhoons on the island. The typhoon also caused heavy damage on Rota and elsewhere in the Northern Mariana Islands, and as a result of its impact the name was retired. (Full article...)- Parsons in 1941
John Whiteside Parsons (born Marvel Whiteside Parsons; October 2, 1914 – June 17, 1952) was an American rocket engineer, chemist, and Thelemite occultist. Associated with the California Institute of Technology (Caltech), Parsons was one of the principal founders of both the Jet Propulsion Laboratory (JPL) and the Aerojet Engineering Corporation. He invented the first rocket engine to use a castable, composite rocket propellant, and pioneered the advancement of both liquid-fuel and solid-fuel rockets.
Born in Los Angeles, Parsons was raised by a wealthy family on Orange Grove Boulevard in Pasadena. Inspired by science fiction literature, he developed an interest in rocketry in his childhood and in 1928 began amateur rocket experiments with school friend Edward S. Forman. He dropped out of Pasadena Junior College and Stanford University due to financial difficulties during the Great Depression, and in 1934 he united with Forman and graduate student Frank Malina to form the Caltech-affiliated Guggenheim Aeronautical Laboratory (GALCIT) Rocket Research Group, supported by GALCIT chairman Theodore von Kármán. In 1939 the GALCIT Group gained funding from the National Academy of Sciences (NAS) to work on Jet-Assisted Take Off (JATO) for the U.S. military. After the U.S. entered World War II, they founded Aerojet in 1942 to develop and sell JATO technology; the GALCIT Group became JPL in 1943. (Full article...) - Reconstructed replica of the holotype skeleton outside the Field Museum of Natural History
Brachiosaurus (/ˌbrækiəˈsɔːrəs/) is a genus of sauropod dinosaur that lived in North America during the Late Jurassic, about 154–153 million years ago. It was first described by American paleontologist Elmer S. Riggs in 1903 from fossils found in the Colorado River valley in western Colorado, United States. Riggs named the dinosaur Brachiosaurus altithorax; the generic name is Greek for "arm lizard", in reference to its proportionately long arms, and the specific name means "deep chest". Brachiosaurus is estimated to have been between 18 and 21 meters (59 and 69 ft) long; weight estimates range from 28.3 to 58 metric tons (31.2 and 64 short tons). It had a disproportionately long neck, small skull, and large overall size, all of which are typical for sauropods. Atypically, Brachiosaurus had longer forelimbs than hindlimbs, which resulted in a steeply inclined trunk, and a proportionally shorter tail.
Brachiosaurus is the namesake genus of the family Brachiosauridae, which includes a handful of other similar sauropods. Most popular depictions of Brachiosaurus are in fact based on Giraffatitan, a genus of brachiosaurid dinosaur from the Tendaguru Formation of Tanzania. Giraffatitan was originally described by German paleontologist Werner Janensch in 1914 as a species of Brachiosaurus, B. brancai, but moved to its own genus in 2009. Three other species of Brachiosaurus have been named based on fossils found in Africa and Europe; two are no longer considered valid, and a third has become a separate genus, Lusotitan. (Full article...) - Cast of skull at the Natural History Museum of the University of Pisa
Livyatan is an extinct genus of macroraptorial sperm whale containing one species: L. melvillei. The genus name was inspired by the biblical sea monster Leviathan, and the species name by Herman Melville, the author of the famous novel Moby-Dick about a white bull sperm whale. It is mainly known from the Pisco Formation of Peru during the Tortonian stage of the Miocene epoch, about 9.9–8.9 million years ago (mya); however, isolated teeth from other locations such as Chile, Argentina, South Africa, and Australia implies that either it or a close relative survived into the Pliocene, around 5 mya, and was present throughout the Southern Hemisphere. It was a member of a group of hyper-predatory macroraptorial sperm whales (or "raptorial sperm whales") and was likely an apex predator, preying on whales, seals, and so forth. Characteristic of raptorial sperm whales, Livyatan had functional, enamel-coated teeth on the upper and lower jaws, as well as several adaptations for hunting large prey.
Livyatan's total length has been estimated to be about 13.5–17.5 m (44–57 ft), similar to the modern sperm whale (Physeter macrocephalus), making it one of the largest predators to have ever existed. The teeth of Livyatan measured 36.2 cm (1.2 ft), and are the largest biting teeth of any known animal, excluding tusks. It is distinguished from the other raptorial sperm whales by the basin on the skull, and how it spans the entire length of the snout. The spermaceti organ, contained in that basin, is thought to have been used in echolocation and communication, or for ramming prey and other sperm whales. The whale may have interacted with the large extinct shark megalodon (Otodus megalodon), competing with it for a similar food source. Its extinction was likely caused by a cooling event at the end of the Miocene which resulted in a drop in food populations. The formation where the whale has been found has also preserved a large assemblage of marine life, such as sharks and marine mammals. (Full article...)
Gymnopilus maritimus is a fungus species of the family Cortinariaceae first collected in northern Sardinia, Italy, in 2006. The species produces moderately sized, sturdy mushrooms of a reddish-orange colour. The cap, which can measure up to 70 millimetres (3 in) across, is covered in orange fibrils, and sometimes has small scales. The yellowish stem measures up to 110 mm (4 in) in length by 8 mm (0.3 in) in width, and sometimes shows remnants of the partial veil. The mushrooms have thick gills of a variable colour, ranging from yellow to rust but staining darker, and the yellow flesh has a mild taste. The mushrooms leave a rusty-brown spore print, while the spores themselves measure from 7.5–11.5 micrometres (0.00030–0.00045 in) in length. The species is most similar in appearance to G. arenophilus and G. fulgens, but can be differentiated from both morphologically. Despite the similarities, it is not closely related to either, suggesting convergent evolution. Instead, within the genus Gymnopilus, it is most closely related to the spectabilis–imperialis clade. However, it is not particularly similar to any of its closest relatives.
The species has been found only on coastal sand dunes near Olbia, in Sardinia, where it was observed growing at the base of Juncus maritimus (the sea rush), between the winter months of October and January. However, there is speculation that it may also grow elsewhere in Europe. Mushrooms were seen growing from both the sandy soil and decaying plants; however, as a saprotrophic feeder, it is possible that the species would be able to grow on other substrates. The mushrooms grow in close groups or tight tufts. (Full article...)- An artist's rendering of an asteroid a few kilometers across colliding with the Earth. Such an impact can release the equivalent energy of several million nuclear weapons detonating simultaneously.
The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary (K–T) extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the exception of some ectothermic species such as the sea turtles and crocodilians, no tetrapods weighing more than 25 kilograms (55 pounds) survived. It marked the end of the Cretaceous period, and with it the end of the entire Mesozoic Era, opening the Cenozoic Era that continues today.
In the geologic record, the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary, which can be found throughout the world in marine and terrestrial rocks. The boundary clay shows unusually high levels of the metal iridium, which is more common in asteroids than in the Earth's crust. (Full article...)
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| Crédito: Fawcett & Lee |
La craneometría es la técnica de medir los huesos del cráneo . La craneometría se practicó una vez intensamente en antropología y etnología . Los cráneos humanos se pueden clasificar en tres categorías principales según el índice cefálico : dolicocefálico : largo y delgado; braquicefálico : corto y ancho; mesocéfalo : longitud y anchura intermedias.
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Leonhard Euler (15 de abril de 1707 en Basilea , Suiza - 18 de septiembre de 1783 en San Petersburgo , Rusia ) fue un matemático y físico suizo . Se le considera el matemático dominante del siglo XVIII y uno de los más grandes matemáticos de todos los tiempos; sin duda se encuentra entre los más prolíficos, con obras recopiladas que ocupan más de 70 volúmenes. Euler desarrolló muchos conceptos importantes y demostró numerosos teoremas duraderosen diversas áreas de las matemáticas , incluido el cálculo , la teoría de números ytopología . En el curso de este trabajo, introdujo gran parte de la terminología matemática moderna, definiendo el concepto de función y su notación, como sin , cos y tan para las funciones trigonométricas .
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Sabías...
- ... que Scientists and Engineers for America es una organización centrada en promover la ciencia sólida en el gobierno y respaldar a los candidatos políticos que apoyan la ciencia y sus aplicaciones?
- ... que la tormenta de nieve de la víspera de Navidad de 2004 fue el evento de nieve más importante para el sur de Texas desde 1895 ?
- ... que la profesora de Stanford Kate Lorig desarrolló un curso de autocontrol de enfermedades crónicas dirigido por pares que es la base del Programa de Pacientes Expertos del Servicio Nacional de Salud Británico ?
- ... que los peces que caminan realmente pueden saltar, gatear, deslizarse e incluso trepar a los árboles?
- ... que el Nor'easter de Acción de Gracias de 1984 depositó un carguero venezolano de 197 pies en el patio trasero de una socialité de Palm Beach, Florida , donde permaneció durante varios meses?
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Noticias de ciencia
- 24 de febrero de 2021 -
- Los científicos descubren Dzharatitanis kingi , un fósil de dinosaurio parecido al Diplodocus , en Uzbekistán . Es el primer dinosaurio de este tipo descubierto en Asia . (Científico nuevo)
- 17 de febrero de 2021 - Descubrimientos de exoplanetas
- Los astrónomos anuncian el descubrimiento de HD 110082 b , un sub-Neptuno exoplaneta que es tres veces más grande que la Tierra y que orbita una estrella relativamente joven. (Phys.org)
- 5 de febrero de 2021 -
- Científicos pertenecientes a una expedición germano - malgache anuncian el descubrimiento de Brookesia nana , un lagarto encontrado en Madagascar. El cuerpo del macho, que mide solo 13,5 milímetros (0,5 pulgadas), es potencialmente el reptil más pequeño de la Tierra. (BBC)
- 22 de enero de 2021 - Pandemia de COVID-19
- Un panel de científicos que asesora a la británica Gobierno anuncia que una variante descubrió por primera vez en el Reino Unido es 30% más letal que el original del SARS-CoV-2 del virus . (Forbes)
- 19 de enero de 2021 - Descubrimientos de exoplanetas
- Los científicos descubren que WASP-107b es una súper bocanada . WASP-107b es un exoplaneta del mismo tamaño que Júpiter pero con una décima parte de la masa, ubicado a 212 años luz de la Tierra . (CBS News) (Sci-News)
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