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Beginning of Paper
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Dinosaurs
Dinosaur is the name of large extinct reptiles of the Mesozoic Era,
during which they were the dominant land animals on Earth. The term was
proposed as a formal zoologic name in 1842 by the British anatomist Sir Richard
Owen, in reference to large fossil bones unearthed in southern England. The
various kinds of dinosaurs are classified in two formal categories, the orders
Saurischia ....
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Middle of Paper
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.... dinosaurs have traditionally been assumed
to have been reptilian in their physiology, cold-blooded, and ectothermic. In
recent years several different lines of evidence have been interpreted as
indicating that dinosaurs may have had warm blood and high rates of metabolism,
comparable to birds and mammals. Evidence supporting this view includes upright
posture and carriage; mammallike microscopical structure of bones; skeletal
features suggestive of high activity; and specialized food-pr ....
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