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Dinosaurs
Beginning of essay
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
v ....
Middle of essay
....inosaurs 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-processing dentitions
and low ratios of dinosaurian predators to prey animals, both suggesting high
food requirements. The evidence is not conclusive--all the facts can be
alternatively explained--but some dinosaurs may .... |
| Number of words: 714 |
Approximate pages: 3 |
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