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When did the T. rex live?A. PermianB. CambrianC. OrdovicianD. Cretaceous
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When did the T. rex live?A. PermianB. CambrianC. OrdovicianD. Cretaceous

User Siavash Alp
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The T. Rex lived at the end of the Cretaceous period (67 million years ago approximately), before the cretaceous-tertiary massive extinction.

User Lenilsondc
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