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Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3. Its presence is implied in a variety of astrophysical observations, including gravitational effects that cannot be explained by accepted theories of gravity unless more matter is present than can be seen. For this reason, most experts think that dark matter is abundant in the universe and that it has had a strong influence on its structure and evolution. Dark matter is called dark because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect or emit electromagnetic radiation, and is therefore difficult to detect.
Gneiss is a common and widely distributed type of metamorphic rock. Gneiss is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Orthogneiss is gneiss derived from igneous rock. Paragneiss is gneiss derived from sedimentary rock. Gneiss forms at higher temperatures and pressures than schist. Gneiss nearly always shows a banded texture characterized by alternating darker and lighter colored bands and without a distinct foliation.
The Dark Side of the Moon is the eighth studio album by the English rock band Pink Floyd, released on 1 March 1973 by Harvest Records. Primarily developed during live performances, the band premiered an early version of the record several months before recording began. The record was conceived as an album that focused on the pressures faced by the band during their arduous lifestyle, and dealing with the apparent mental health problems suffered by former band member Syd Barrett, who departed the group in 1968. New material was recorded in two sessions in 1972 and 1973 at Abbey Road Studios in London.
The "Dark Ages" is a historical periodization traditionally referring to the Early Middle Ages or Middle Ages, that asserts that a demographic, cultural, and economic deterioration occurred in Western Europe following the decline of the Roman Empire.
Wilson's snipe is a small, stocky shorebird. The genus name gallinago is New Latin for a woodcock or snipe from Latin gallina, "hen" and the suffix -ago, "resembling". The specific delicata is Latin for "dainty".
The Savannah sparrow is a small New World sparrow. It was the only member of the genus Passerculus and is typically the only widely accepted member. Comparison of mtDNA NADH dehydrogenase subunit 2 and 3 sequences indicates that the Ipswich sparrow, formerly usually considered a valid species, is a well-marked subspecies of the Savannah sparrow, whereas the southwestern large-billed sparrow should be recognized as a distinct species.
Egbert Anson Van Alstyne was an American songwriter and pianist. Van Alstyne was the composer of a number of popular and ragtime tunes of the early 20th century.
El Morro National Monument is a U.S. national monument in Cibola County, New Mexico, United States. Located on an ancient east–west trail in the western part of the state, the monument preserves the remains of a large prehistoric pueblo atop a great sandstone promontory with a pool of water at its base, which subsequently became a landmark where many centuries of explorers and travelers left historic inscriptions that survive today.
Grullo or grulla, also called blue dun, gray dun or mouse dun, is a color of horses in the dun family, characterized by tan-gray or mouse-colored hairs on the body, often with shoulder and dorsal stripes and black barring on the lower legs. In this coloration, each individual hair is mouse-colored, unlike a roan, which is composed of a mixture of dark and light hairs. The several shades of grulla are informally referred to with a variety of terms, including black dun, blue dun, slate grulla, silver grulla or light grulla, silver dun, or lobo dun. Silver grulla may also refer to a grullo horse with silver dapple, regardless of shade. In the Icelandic horse, the grulla color is called gray dun, in the Highland pony it is called mouse dun, and in the Norwegian Fjord horse, grå or gråblakk.
The Lancaster Red Roses baseball team, originally known as the Maroons, changed its name at the start of the 1906 season during a bitter match with the York, Pennsylvania-based White Roses. Some sources indicate that the rival teams were named for the opposing factions in England's historic Wars of the Roses. The Lancaster Red Roses played at Stumpf Field, which is still used today by local baseball and softball leagues.
The rusty-spotted genet, also called panther genet and large-spotted genet, is a genet that is widely distributed in sub-Saharan Africa. It is considered common and therefore listed as Least Concern on the IUCN Red List.
Alma Juventus Fano 1906, commonly known as Fano, is an Italian association football club located in Fano, Marche. The club currently plays in Serie C, the third tier of Italian football.
This is a list of works by Russian writer Leo Tolstoy (1828–1910), including his novels, novellas, short stories, plays and non-fiction.
Comet Kopff or 22P/Kopff is a periodic comet in the Solar System. Discovered on August 23, 1906, it was named after August Kopff who discovered the comet. The comet was missed on its November 1912 return, but was recovered on its June 1919 return. The comet has not been missed since its 1919 return and its last perihelion passage was on May 25, 2009. Close approaches to Jupiter in 1938 and 1943 decreased the perihelion distance and orbital period. 22P/Kopff’s next perihelion passage is 18 March 2022.
Georgia usually refers to:
Orthonama obstipata, the gem, is a moth of the family Geometridae. The species was first described by Johan Christian Fabricius in 1794. It is common in continental Europe and adjacent lands, though in the northeast, its range does not significantly extend beyond the Baltic region and it is absent from northern Russia. This well-flying species is somewhat prone to vagrancy and able to cross considerable distances of open sea; it can thus be regularly found on the British Isles and even on Iceland.
Unione Sportiva Dilettantistica Adriese 1906 is an Italian association football club, based in Adria, Veneto. The club was founded in 1906. Adriese currently plays in Serie D. The team's colors are dark red and blue. They played home games at the Stadio Luigi Bettinazzi stadium.
Dark Shadows: London's Burning is a Big Finish Productions original dramatic reading based on the long-running American horror soap opera series Dark Shadows.
Slieve Gallion (1904–1926) was a British Thoroughbred racehorse and sire. In a career that lasted from May 1906 to June 1907 he ran eight times and won six races. He was one of the leading British two-year-olds of 1906 when his wins included the Champagne Stakes at Doncaster. The following spring he became a Classic winner by taking the 2000 Guineas but finished third when favourite for The Derby. After winning his only subsequent race he was sold and exported to stand as a stallion in Hungary.
The 64th Boat Race took place on 16 March 1907. Held annually, the Boat Race is a side-by-side rowing race between crews from the Universities of Oxford and Cambridge along the River Thames. Cambridge were reigning champions, having won the previous year's race, and more than half their crew had already participated in the event. In a race umpired by Frederick I. Pitman, Cambridge won by 4 1⁄2 lengths in a time of 20 minutes 26 seconds. It was their second consecutive victory and their fifth win in six races, taking the overall record in the event to 34–29 in Oxford's favour.
References
- ↑ Loxotrochis at funet.fi.
- ↑ Trans. Ent. Soc. Lond. 1906 (2): 205
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