AUBURN, Wash. (AP/WJW) — Spectators cheered as participants ran down the track cloaked in inflatable Tyrannosaurus rex costumes during the T-Rex World Championship Races at Emerald Downs in Auburn, ...

A remarkably complete tyrannosaur specimen, unearthed in the middle of Montana, may finally settle one of the most contentious debates in paleontology and upend our understanding of Tyrannosaurus rex, ...

Researchers on Thursday unveiled the first calculation of the total T. rex population, putting the number at 2.5 billion over 125,000 generations. Ferocious tyrannosaur dinosaurs may not have been ...

This browser does not support the Video element. The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this ...

Ferocious tyrannosaur dinosaurs may not have been solitary predators as long envisioned, but more like social carnivores such as wolves, new research unveiled Monday found. Paleontologists developed ...