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Eotyrannus was an early relative of Tyrannosaurus rex. It was much smaller than Tyrannosaurus rex - Eotyrannus was "only" about 20 feet (6 meters) long. Additional differences between Eotyrannus and Tyrannosaurus rex, include the fact that Eotyrannus was very lightly built, and had long grasping hands (whereas Tyrannosaurus rex had relatively puny arms).
Eotyrannus probably preyed upon Hypsilophodon and Iguanodon, which both contemporaries of Eotyrannus, and lived in some of the same areas.
Eotyrannus was a carnivore (meat-eater) that lived from 125 to 120 million years ago
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