Portal:Science
Science is a strict systematic discipline that builds and organizes knowledge in the form of testable hypotheses and predictions about the world. Modern science is typically divided into three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study individuals and societies; and the formal sciences (e.g., logic, mathematics, and theoretical computer science), which study formal systems, governed by axioms and rules. There is disagreement whether the formal sciences are scientific disciplines, as they do not rely on empirical evidence. Applied sciences are disciplines that use scientific knowledge for practical purposes, such as in engineering and medicine. (Full article...)
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![Image 1 Icelandic horse performing the tölt The Icelandic horse (Icelandic: íslenski hesturinn [ˈistlɛnscɪ ˈhɛstʏrɪn]), or Icelandic, is a breed of horse developed in Iceland. Although the horses are smaller (at times pony-sized) compared to other breeds, most registries for the Icelandic refer to it as a horse. The breed is long-lived and hardy, owing to the ruggedness of its home country. In their native Iceland they have few afflictions or diseases, thus national laws are in place preventing foreign-born horses from being imported into the country, while exported animals are not permitted to return. In addition to the gaits of walk, trot, and canter/gallop, typical of other horse breeds, many Icelandic horses can also do the tölt (ambling gait) and the flying pace. The only breed of horse in Iceland, the Icelandic is also popular internationally, and sizable populations exist in Europe and North America. The breed is still used for traditional sheepherding work in its native country, as well as for leisure, showing, and racing. (Full article...)](//upload.wikimedia.org/wikipedia/en/d/d2/Blank.png)
The Icelandic horse (Icelandic: íslenski hesturinn [ˈistlɛnscɪ ˈhɛstʏrɪn]), or Icelandic, is a breed of horse developed in Iceland. Although the horses are smaller (at times pony-sized) compared to other breeds, most registries for the Icelandic refer to it as a horse. The breed is long-lived and hardy, owing to the ruggedness of its home country. In their native Iceland they have few afflictions or diseases, thus national laws are in place preventing foreign-born horses from being imported into the country, while exported animals are not permitted to return. In addition to the gaits of walk, trot, and canter/gallop, typical of other horse breeds, many Icelandic horses can also do the tölt (ambling gait) and the flying pace. The only breed of horse in Iceland, the Icelandic is also popular internationally, and sizable populations exist in Europe and North America. The breed is still used for traditional sheepherding work in its native country, as well as for leisure, showing, and racing. (Full article...)
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The Inaccessible Island rail (Laterallus rogersi) is a small bird of the rail family, Rallidae. Endemic to Inaccessible Island in the Tristan Archipelago in the isolated south Atlantic, it is the smallest extant flightless bird in the world. The species was formally described by physician Percy Lowe in 1923 but had first come to the attention of scientists 50 years earlier. The Inaccessible Island rail's taxonomic affinities and origin were a long-standing mystery; in 2018 its closest relative was identified as the South American dot-winged crake, and it was decided that both species are best classified in the genus Laterallus. (Full article...)
The geology of the Grand Canyon area includes one of the most complete and studied sequences of rock on Earth. The nearly 40 major sedimentary rock layers exposed in the Grand Canyon and in the Grand Canyon National Park area range in age from about 200 million to nearly 2 billion years old. Most were deposited in warm, shallow seas and near ancient, long-gone sea shores in western North America. Both marine and terrestrial sediments are represented, including lithified sand dunes from an extinct desert. There are at least 14 known unconformities in the geologic record found in the Grand Canyon. (Full article...)
Perseus is a constellation in the northern sky, named after the Greek mythological hero Perseus. It is one of the 48 ancient constellations listed by the 2nd-century astronomer Ptolemy, and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located near several other constellations named after ancient Greek legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west. Some star atlases during the early 19th century also depicted Perseus holding the disembodied head of Medusa, whose asterism was named together as Perseus et Caput Medusae; however, this never came into popular usage. (Full article...)
The Calgary Stampede is an annual rodeo, exhibition, and festival held every July in Calgary, Alberta, Canada. The ten-day event, which bills itself as "The Greatest Outdoor Show on Earth", attracts over one million visitors per year and features one of the world's largest rodeos, a parade, midway, stage shows, concerts, agricultural competitions, chuckwagon racing, and First Nations exhibitions. In 2008, the Calgary Stampede was inducted into the ProRodeo Hall of Fame. (Full article...)
William Robinson "W. R. " Brown (January 17, 1875 – August 4, 1955) was an American corporate officer of the Brown Company of Berlin, New Hampshire. He was also an influential Arabian horse breeder, the founder and owner of the Maynesboro Stud, and an authority on Arabian horses. (Full article...)
The Andalusian, also known as the Pure Spanish Horse or PRE (pura raza española), is a horse breed from the Iberian Peninsula, where its ancestors have lived for thousands of years. The Andalusian has been recognized as a distinct breed since the 15th century, and its conformation has changed very little over the centuries. Throughout its history, it has been known for its prowess as a war horse, and was prized by the nobility. The breed was used as a tool of diplomacy by the Spanish government, and kings across Europe rode and owned Spanish horses. During the 19th century, warfare, disease and crossbreeding reduced herd numbers dramatically, and despite some recovery in the late 19th century, the trend continued into the early 20th century. Exports of Andalusians from Spain were restricted until the 1960s, but the breed has since spread throughout the world, despite their low population. In 2010, there were more than 185,000 registered Andalusians worldwide. (Full article...)
The American goldfinch (Spinus tristis) is a small North American bird in the finch family. It is migratory, ranging from mid-Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter. (Full article...)
Massospondylus (/ˌmæsoʊˈspɒndɪləs/ mas-oh-SPON-di-ləs; from Greek, μάσσων (massōn, "longer") and σπόνδυλος (spondylos, "vertebra")) was a genus of sauropodomorph dinosaur from the Early Jurassic (Hettangian to Pliensbachian ages, ca. 200–183 million years ago). It was described by Sir Richard Owen in 1854 from remains discovered in South Africa, and is thus one of the first dinosaurs to have been named. Fossils have since been found at other locations in South Africa, Lesotho, and Zimbabwe. Material from Arizona's Kayenta Formation, India, and Argentina has been assigned to the genus at various times, but the Arizonan and Argentinian material are now assigned to other genera. (Full article...)
Ursa Minor (Latin: 'Lesser Bear', contrasting with Ursa Major), also known as the Little Bear, is a constellation located in the far northern sky. As with the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the North American name, Little Dipper: seven stars with four in its bowl like its partner the Big Dipper. Ursa Minor was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, because of Polaris being the north pole star. (Full article...)
Catopsbaatar is a genus of multituberculate, an extinct order of rodent-like mammals. It lived in what is now Mongolia during the late Campanian age of the Late Cretaceous epoch, about 72 million years ago. The first fossils were collected in the early 1970s, and the animal was named as a new species of the genus Djadochtatherium in 1974, D. catopsaloides. The specific name refers to the animal's similarity to the genus Catopsalis. The species was moved to the genus Catopsalis in 1979, and received its own genus (Catopsbaatar, Greek and Mongolian for 'visible hero') in 1994. Five skulls, one molar, and one skeleton with a skull are known; the last is the genus' most complete specimen. Catopsbaatar was a member of the family Djadochtatheriidae. (Full article...)
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