A new study has found that the T. rex's arms evolved to become smaller at the same time as its head grew to catch more prey ...

A Royal Society research paper published May 20 suggests that T. rex, which averaged more than 40 feet long with arms ...

By Will Dunham May 29 (Reuters) - Tyrannosaurus rex possessed a preposterously massive skull - 5 feet long (1.5 meters) and built to enable bone-crunching bite force - but presented preposterously ...

It’s a known fact that Tyrannosaurus rex dinosaurs have small arms — but why? Scientists now believe they have cracked the mystery. According to a new research study published by The Royal Society on ...

An analysis of 85 dinosaur species shows that tiny forearms in meat-eating dinosaurs were the result of an evolutionary trade ...

T. rex and other giant dinosaurs evolved tiny arms because their skulls and bites became powerful enough to replace forelimbs ...

A new study documents that the robustness of skulls in carnivorous dinosaurs began to evolve first, a direct response to the increasing size of the plant-eating dinosaurs they hunted, shortly after di ...

They were once one of the most fearsome dinosaurs to roam the earth, with an enormous set of teeth, but why did the T.rex ...

The T. rex has tiny arms with two fingers and claws, according to the Smithsonian. Its claws were large, and its arms were ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Paleontologists in Argentina have discovered a new species of dinosaur, with disproportionately short arms like those of Tyrannosaurus rex. A fossil of Meraxes gigas, as the new dinosaur has been ...