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Mark A. Norell (born July 26, 1957) is an American paleontologist and molecular geneticist, acknowledged as one of the most important living vertebrate paleontologists. He is currently the chairman of paleontology and a research associate at the American Museum of Natural History. He is best known as the discoverer of the first theropod embryo and for the description of feathered dinosaurs. Norell is credited with the naming of the genera ''Apsaravis'', ''Byronosaurus'', ''Citipati'', ''Tsaagan'', and ''Achillobator''. His work regularly appears in major scientific journals (including cover stories in Science and Nature) and was listed by Time magazine as one of the ten most significant science stories of 1993, 1994 and 1996. Norell is both a fellow of the Explorer's Club and the Willi Hennig Society. ==Career== Norell's research has encompassed a number of different areas, from the theoretical study of diversity through time, and his doctoral thesis of the evolutionary variations in maize. Following his M.S. at San Diego, Norell published papers on the efficacy of the fossil record in capturing phylogenetic history, and how missing data can influence the estimation of phylogeny. Norell became a curator at the American Museum of Natural History in 1990 and helped oversee the renovation of the Halls of Vertebrate Evolution. The organization, where visitors progress in a circular motion around the floor, mirrors the evolutionary patterns of a phylogenetic tree. Thus, guests begin their exploration with the simplest vertebrates, placoderms and bony fishes, and conclude their visit with advanced mammals, such as mammoths and artiodactyls. Currently, Norell studies relationships of small carnivorous dinosaurs to modern birds and develops new ways of observing fossils through CT scans and imaging computers.〔(【引用サイトリンク】url=http://research.amnh.org/paleontology/staff/mark-norell )〕 He has led over twenty international paleontological expeditions, in locales such as Patagonia, Cuba, the Chilean Andes, the Sahara and West Africa. The famous Mongolia project, which has delivered numerous discoveries in vertebrate evolution, has received world-wide attention. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mark Norell」の詳細全文を読む スポンサード リンク
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