Why T. rex was different Tyrannosaurids had stiff, akinetic skulls—meaning the joints allowed almost no movement. Combined with deep skulls, thick bone, and massive jaw muscles, this design produced ...
Add Yahoo as a preferred source to see more of our stories on Google. Tyrannosaurus rex is known as the king of the dinosaurs. - Roger Harris/Science Photo Library RF/Getty Images Tyrannosaurus rex ...
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