Apatosaurus dinosaur, illustration
Apatosaurus dinosaur, illustration. Apatosaurus was a large herbivore dinosaur that lived during the late Jurassic Period (150 million years ago). They were one of the largest land animals ever to have existed and reached lengths of up to 20 metres long. They are part of the Diplodocus group of sauropods and are a separate species to the similar Brontosaurus., by ROGER HARRIS/SCIENCE PHOTO LIBRARY
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