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Djurab Desert
The Djurab Desert (''Djourab'', ) is a desert in northern Chad. Part of the greater Sahara desert, it makes up much of the area of Chad's Borkou region. The Koro Toro settlement and maximum security prison is situated on the eastern boundary of the desert. The closest major settlements are Salal to the south and Faya-Largeau to the northeast. To the west is the Ténéré desert (the Erg of Bilma) of western Chad and Niger, to the north are the Tibesti Mountains of the central Sahara. Aeolian deflation in the northern subbasin formed the desert with an arid conditions. Desert reached through Sahara and reduced Lake Chad. Many fossils have been found in this desert, ''Kossom Bougoudi'' and ''Toros-Menalla'' being among the most bountiful fossil-bearing areas. A team led by Michel Brunet, from the University of Poitiers, excavated in the Djurab desert during the mid-1990s. In 2001, the type fossil of ''Sahelanthropus tchadensis'', a hominid species of about 7 million years ago, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert
A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or semi-arid. This includes much of the polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location. Deserts are formed by weathering processes as large variations in temperature between day and night put strains on the rocks, which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter, and the resulting fragments and rubble strewn over the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michel Brunet (paleontologist)
Michel Brunet (born April 6, 1940) is a French paleontologist and a professor at the Collège de France. In 2001 Brunet announced the discovery in Central Africa of the skull and jaw remains of a late Miocene hominid nicknamed Toumaï. These remains may predate the earliest previously known hominid remains, Lucy, by over three million years; however, this conclusion is the subject of a significant controversy. Biography Brunet was born in 1940 in Vienne, in the region of Poitou. After having passed his first years in the countryside, at 8 he moved with his family to Versailles. He took a Ph.D. in paleontology at the Sorbonne and then became Professor of Vertebrate paleontology at the University of Poitiers, specializing in hoofed mammals. A turning point in Brunet's career was when he heard that paleoanthropologist David Pilbeam was searching for fossil apes in Pakistan and the ancestors of the hominids. This spurred Brunet to form with his colleague Emile Heintz a team with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yale University Press
Yale University Press is the university press of Yale University. It was founded in 1908 by George Parmly Day, and became an official department of Yale University in 1961, but it remains financially and operationally autonomous. , Yale University Press publishes approximately 300 new hardcover and 150 new paperback books annually and has a backlist of about 5,000 books in print. Its books have won five National Book Awards, two National Book Critics Circle Awards and eight Pulitzer Prizes. The press maintains offices in New Haven, Connecticut and London, England. Yale is the only American university press with a full-scale publishing operation in Europe. It was a co-founder of the distributor TriLiteral LLC with MIT Press and Harvard University Press. TriLiteral was sold to LSC Communications in 2018. Series and publishing programs Yale Series of Younger Poets Since its inception in 1919, the Yale Series of Younger Poets Competition has published the first collection of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Science & Business Media
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cranium
The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, these two parts are the neurocranium and the viscerocranium ( facial skeleton) that includes the mandible as its largest bone. The skull forms the anterior-most portion of the skeleton and is a product of cephalisation—housing the brain, and several sensory structures such as the eyes, ears, nose, and mouth. In humans these sensory structures are part of the facial skeleton. Functions of the skull include protection of the brain, fixing the distance between the eyes to allow stereoscopic vision, and fixing the position of the ears to enable sound localisation of the direction and distance of sounds. In some animals, such as horned ungulates (mammals with hooves), the skull also has a defensive function by providing the mount (on the fron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodile
Crocodiles (family (biology), family Crocodylidae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. The term crocodile is sometimes used even more loosely to include all extant taxon, extant members of the order (biology), order Crocodilia, which includes the alligators and caimans (family Alligatoridae), the gharial and false gharial (family Gavialidae) among other extinct taxa. Although they appear similar, crocodiles, alligators and the gharial belong to separate biological family (biology), families. The gharial, with its narrow snout, is easier to distinguish, while Morphology (biology), morphological differences are more difficult to spot in crocodiles and alligators. The most obvious external differences are visible in the head, with crocodiles having narrower and longer heads, with a more V-shaped than a U-shaped snout compared to alligators and caimans. Another obvious trait is that the upp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plaster
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for Molding (decorative), moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces. The most common types of plaster mainly contain either gypsum, lime plaster, lime, or cement plaster, cement,Franz Wirsching "Calcium Sulfate" in Ullmann's Encyclopedia of Industrial Chemistry, 2012 Wiley-VCH, Weinheim. but all work in a similar way. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The reaction with water liberates heat through crystallization and the hydrated plaster then ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Université De Montréal
The Université de Montréal (UdeM; ; translates to University of Montreal) is a French-language public research university in Montreal, Quebec, Canada. The university's main campus is located in the Côte-des-Neiges neighborhood of Côte-des-Neiges–Notre-Dame-de-Grâce on Mount Royal near the Outremont Summit (also called Mount Murray), in the borough of Outremont. The institution comprises thirteen faculties, more than sixty departments and two affiliated schools: the Polytechnique Montréal (School of Engineering; formerly the École polytechnique de Montréal) and HEC Montréal (School of Business). It offers more than 650 undergraduate programmes and graduate programmes, including 71 doctoral programmes. The university was founded as a satellite campus of the Université Laval in 1878. It became an independent institution after it was issued a papal charter in 1919 and a provincial charter in 1920. Université de Montréal moved from Montreal's Quartier Latin to its pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic News
The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational organizations in the world. Founded in 1888, its interests include geography, archaeology, and natural science, the promotion of environmental and historical conservation, and the study of world culture and history. The National Geographic Society's logo is a yellow portrait frame—rectangular in shape—which appears on the margins surrounding the front covers of its magazines and as its television channel logo. Through National Geographic Partners (a joint venture with The Walt Disney Company), the Society operates the magazine, TV channels, a website, worldwide events, and other media operations. Overview The National Geographic Society was founded on 13 January 1888 "to increase and diffuse geographic knowledge". It is governed by a board of trustees whose 33 members include distinguished educators, business executives, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahelanthropus Tchadensis
''Sahelanthropus tchadensis'' is an extinct species of the Homininae (African apes) dated to about , during the Miocene epoch. The species, and its genus ''Sahelanthropus'', was announced in 2002, based mainly on a partial cranium, nicknamed ''Toumaï'', discovered in northern Chad. ''Sahelanthropus tchadensis'' lived close to the time of the chimpanzee–human divergence, possibly related to ''Orrorin'', a species of Homininae that lived about one million years later. It may have been ancestral to both humans and chimpanzees (which would place it in the tribe Hominini), or alternatively an early member of the tribe Gorillini. In 2020, the femur was analyzed, and it was found that ''Sahelanthropus'' was not bipedal, casting some doubt on its position as a human ancestor, but this was refuted in 2022. Taxonomy Discovery Funded by the Mission Paléoanthropologique Franco–Tchadienne, Ahounta Djimdoumalbaye, Fanoné Gongdibé, Mahamat Adoum, and Alain Beauvilain identified the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
