TOM MCHUGH / SCIENCE PHOTO LIBRARY TOM MCHUGH / SCIENCE PHOTO LIBRARY
Tyrannosaurus rex. Fossil head of the giant carnivorous dinosaur T. rex. This species lived in North America and Asia about 70 million years ago. Aided by a powerful sense of smell and acute vision it hunted smaller animals like duck-billed dinosaurs, sprinting after them on two colossal hind legs. Its tiny, withered front legs were almost useless so it probably used its hind legs to disembowel victims after inflicting a fatal bite. The conical teeth were constantly renewed to maintain sharpness. One of the largest carnivorous dinosaurs, T. rex measured 6 metres in height and 10 tonnes in weight.
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