Tyrannosaurus rex

The 4-foot-long jaw, the 6-inch-long teeth, the massive thigh bones—almost everything about Tyrannosaurus rex indicates the enormous power of one of the largest theropod dinosaurs that ever existed.

The fossil was originally arranged so that the dinosaur stood upright. Museum scientists later determined that it was more accurate to show the Tyrannosaurus rex mounted in a stalking position, with its head low, tail extended, and one foot slightly raised.

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