T. rex was unlikely to have been a herbivore. But which animals the tyrant lizard actually ate is a far harder nut to crack.

霸王龙不太可能是草食动物，但是这个蜥蜴之王到底吃那种动物却是个更难解的谜。

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Some paleontologists had reasoned that the tyrant lizard hit speeds of 45 miles per hour, but Hutchinson says it only managed 10 to 25 miles per hour.

FORBES: What's The Human Speed Limit?