WALTER MYERS / SCIENCE PHOTO LIBRARY WALTER MYERS / SCIENCE PHOTO LIBRARY
Allosaurus dinosaurs. Computer artwork of a pair of Allosaurus searching for dinner in a lush mountainside Jurassic redwood forest. Allosaurs were large carnivorous reptiles that lived during the late Jurassic period (155 to 145 million years ago). They were bipedal (two-legged) predators that averaged a height of 8.5 metres.
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