Rex. However, its close cousin, who reigned in Asia at the same time, is far less known even though it was almost just as ...

Scientists have wondered for years why the Tyrannosaurus Rex has the tiny 3 1/3 foot arms. Recent discoveries suggest that they evolved them to counterbalance their huge heads. Follow Tech Insider ...

Others sleep like a tyrannosaurus — yes, the dinosaur with such absurdly short arms that it almost feels like evolution was playing a trick on the poor creature. The "T-rex position" entails ...

New habitat, environs, and food sources made some of the dinosaurs to start using their arms for a whole new purpose ...