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.

A fractured rib from the largest Tyrannosaurus rex ever described has yielded something paleontologists once thought impossible: blood vessel structures preserved inside 66-million-year-old bone, locked in place since the animal was still alive and healing from injury.

A handbag is promoted as the "world's first T. rex leather product." But scientists are questioning its authenticity.

A distorted dinosaur skull, once dismissed as unusable, became the focus of a detailed digital reconstruction that revealed new insights into early carnivorous dinosaurs.

WASHINGTON (Reuters) - Surmising even the physical appearance of a dinosaur - or any extinct animal - based on its fossils is a tricky proposition, with so many uncertainties involved. Assessing a dinosaur's intelligence, considering the innumerable ...

Paleontologists have discovered a new species of dinosaur that was related to the infamous Tyrannosaurus rex. The dino fossils, two partial skeletons found in Gobi Desert in Mongolia in the 1970s, were recently reanalyzed after Jared Voris, a Ph.D student ...

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 ...