T. rex Debate: One or Three? - VOA Learning English

Tyrannosaurus Rex, or T. rex, has long been one of the most famous dinosaurs. Now, researchers are debating whether the giant meat-eating tyrannosaurus should be considered as one species or three different species.

Tyrannosaurus Rex, or T. rex, has long been one of the most famous dinosaurs. Now, researchers are debating whether the giant meat-eating tyrannosaurus should be considered as one species or three di… [+4208 chars]

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