Bivalvia (/baɪˈvælviə/) or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquaticmolluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-shells known as valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidia, specialised organs for feeding and breathing. (Full article...)
The bobcat (Lynx rufus), also known as the red lynx, is one of the four extant species within the medium-sized wild catgenusLynx. Native to North America, it ranges from southern Canada through most of the contiguous United States to Oaxaca in Mexico. It is listed as Least Concern on the IUCN Red List since 2002, due to its wide distribution and large population. Although it has been hunted extensively both for sport and fur, populations have proven stable, though declining in some areas. (Full article...)
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The western yellow robin (Eopsaltria griseogularis) is a species of bird in the Australasian robin family, Petroicidae, native to Australia. Described by John Gould in 1838, the western yellow robin and its Australian relatives are not closely related to either the European or American robins, but they appear to be an early offshoot of the Passerida group of songbirds. Ranging between 13.5 and 15.5 cm (5+1⁄4 and 6 in) long, it has grey upperparts, and a grey breast and head, broken by whitish streaks near the bill and below the eye, with a conspicuous yellow belly. The sexes are similar in appearance. Two subspecies are recognized: subspecies griseogularis, which has a yellow rump, and subspecies rosinae with an olive-green rump. (Full article...)
The St. Croix macaw (Ara autocthones) or Puerto Rican macaw is an extinct species of macaw whose remains have been found on the Caribbean islands of St. Croix and Puerto Rico. It was described in 1937 based on a tibiotarsus leg bone unearthed from a kitchen midden at a pre-Columbian site on St. Croix. A second specimen consisting of various bones from a similar site on Puerto Rico was described in 2008, while a coracoid from Montserrat may belong to this or another extinct species of macaw. The St. Croix macaw is one of 13 extinct macaw species that have been proposed to have lived on the Caribbean islands. Macaws were frequently transported long distances by humans in prehistoric and historical times, so it is impossible to know whether species known only from bones or accounts were native or imported. (Full article...)
Dromaeosauroides is a genus of dromaeosauridtheropoddinosaur from the Early Cretaceous of what is now Denmark and possibly also England. It was discovered in the Jydegaard Formation in the Robbedale valley, on the island of Bornholm in the Baltic Sea. This is the only likely place for dinosaur remains to be discovered on Danish territory, since the Mesozoic deposits exposed in the rest of the country are marine. Dromaeosauroides is the first known dinosaur from Denmark, and the only one which has been scientifically named. It is one of the oldest known dromaeosaurs in the world, and the first known uncontested dromaeosaur from the Early Cretaceous of Europe. (Full article...)
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"Volcano" is the second episode of the first season of the American animated television series South Park. It first aired on Comedy Central in the United States on August 20, 1997. In the episode, Stan, Kyle, Cartman and Kenny go on a hunting trip with Stan's uncle Jimbo and his war buddy Ned. While on the trip, Stan is frustrated by his unwillingness to shoot a living creature, and Cartman tries to scare the hunting party with tales of a creature named Scuzzlebutt. Meanwhile, the group is unaware that a nearby volcano is about to erupt. (Full article...)
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Tylopilus felleus, commonly known as the bitter bolete or the bitter tylopilus, is a fungus of the bolete family. Its distribution includes east Asia, Europe and eastern North America, extending south into Mexico and Central America. A mycorrhizal species, it grows in deciduous and coniferous woodland, often fruiting under beech and oak. Its fruit bodies have convex to flat caps that are some shade of brown, buff or tan and typically measure up to 15 cm (6 in) in diameter. The pore surface is initially white before turning pinkish with age. Like most boletes it lacks a ring and it may be distinguished from Boletus edulis and other similar species by its unusual pink pores and the prominent dark-brown net-like pattern on its stalk. (Full article...)
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Title page from the second volume of Lives of the Most Eminent Literary and Scientific Men of France (1838)
Taare Zameen Par (lit.'Stars on Earth'), also known as Like Stars on Earth in English, is a 2007 Indian Hindi-language psychological drama film produced and directed by Aamir Khan. It stars Khan himself, with Darsheel Safary, Tanay Chheda, Vipin Sharma and Tisca Chopra. It explores the life and imagination of Ishaan (Safary), an artistically gifted 8-year-old boy whose poor academic performance leads his parents to send him to a boarding school, where a new art teacher Nikumbh (Khan) suspects that he is dyslexic and helps him to overcome his reading disorder. (Full article...)
... that The Science of Dune contains a scientific analysis of the fictional concepts from the Dune franchise, such as sandworms, stillsuits, and the fictional drug melange?
... that the Data Colada bloggers drew attention to the replication crisis by exposing faulty social science research?
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Many naturally occurring phenomena approximate a normal distribution.
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Sci-Hub is a shadow library website that provides free access to millions of research papers, regardless of copyright, by bypassing publishers' paywalls in various ways. Unlike Library Genesis, it does not provide access to books. Sci-Hub was founded in Kazakhstan by Alexandra Elbakyan in 2011, in response to the high cost of research papers behind paywalls (see Serials crisis). The site is extensively used worldwide. In September 2019, the site's operator(s) said that it served approximately 400,000 requests per day. In addition to its intensive use, Sci-Hub stands out among other shadow libraries because of its easy use/reliability and because of the enormous size of its collection; a 2018 study estimated that Sci-Hub provided access to 95% of all scholarly publications with issued DOI numbers. On 15 July 2022, Sci-Hub reported that its collection comprised 88,343,822 files. From December 2020 to 2022, the site has paused uploads due to legal troubles. (Full article...)
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A plot of normal distribution (or bell-shaped curve) where each band has a width of 1 standard deviation – See also: 68–95–99.7 rule. In statistics, the standard deviation is a measure of the amount of variation of the values of a variable about its mean. A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range. The standard deviation is commonly used in the determination of what constitutes an outlier and what does not. (Full article...)
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Peruvian Andes at United States Exploring Expedition, by Alfred Thomas Agate (edited by Durova) (from Wikipedia:Featured pictures/Sciences/Others)
Animation of a water drop, by Chris 73 and Gmaxwell (from Wikipedia:Featured pictures/Sciences/Others)
Archaeologists prospecting Santa Ana Cave at Excavation (archaeology), by Mario modesto (from Wikipedia:Featured pictures/Sciences/Others)
NASA study on wingtip vortices at Wake turbulence, by Langley Research Center (edited by Fir0002) (from Wikipedia:Featured pictures/Sciences/Others)
Projectile motion of a bouncing ball at Inelastic collision, by MichaelMaggs (from Wikipedia:Featured pictures/Sciences/Others)
Color cathodoluminescence of a diamond, by Pavel.Somov (from Wikipedia:Featured pictures/Sciences/Others)
Simulation of liquids with different viscosities, by Synapticrelay (from Wikipedia:Featured pictures/Sciences/Others)
Toroid magnets of the ATLAS detector, by Maximilien Brice, CERN (edited by Bammesk) (from Wikipedia:Featured pictures/Sciences/Others)
Drop impact on a liquid surface, by José Manuel Suárez (from Wikipedia:Featured pictures/Sciences/Others)
Vibrating glass beam at Euler–Bernoulli beam theory, by Ben pcc (from Wikipedia:Featured pictures/Sciences/Others)
Section of the Large Hadron Collider, by Maximilien Brice (from Wikipedia:Featured pictures/Sciences/Others)
Nobel Prize in Physics diploma, by Sofia Gisberg (restored by Jebulon) (from Wikipedia:Featured pictures/Sciences/Others)
Global oceanic and terrestrial photoautotroph abundance at Primary production, by SeaWiFS Project (from Wikipedia:Featured pictures/Sciences/Others)
Archaeological excavation at Atapuerca Mountains, by Mario modesto (from Wikipedia:Featured pictures/Sciences/Others)
Mechanical advantage device, by Prolineserver (edited by Tomia, Ss181292 and Atropos235) (from Wikipedia:Featured pictures/Sciences/Others)
Translational motion at Thermodynamic temperature, by Greg L (from Wikipedia:Featured pictures/Sciences/Others)
Parallax, by Mila Zinkova (edited by Richard Bartz) (from Wikipedia:Featured pictures/Sciences/Others)
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