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T-Rex is the short form on Tyrannosaurus. The first T-Rex appeared on earth during the early Cretaceous about 137 million years ago. "T-Rex" means the king of the dinosaurs. They were carnivorous and mainly eat smaller dinosaurs.

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7y ago
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9y ago

Dinosaurs were first evolved in South America. The earliest known dinosaur to live was the Eoraptor.

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Q: When did the first T-Rex appeared on earth?
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