Some scientists have suggested a different idea: T. rex’s arms may have evolved to be smaller as another body part grew larger. The fossil record reveals that arms got shorter as theropod skulls got larger across many different dinosaur groups, including T. rex. Larger skulls likely would have made it easier to hunt and eat larger prey.

The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this classic image might be wrong.The teeth on T. rex and other big theropods were likely covered by scaly lips ...

Warning: Contains SPOILERS for the Jurassic Park and Jurassic World movies!The Jurassic Park franchise is full of dinosaurs, but some are far more powerful and intimidating than the rest. The Distortus rex from Jurassic World Rebirth is the newest ...