A worthy matchup of big teeth, little brains. Picture this: Two dinosaurs with massive teeth and hulking figures circle each other, threatening a smackdown. Each was the most successful predator of ...

Who was the biggest predator of them all? For as long as I can remember, Tyrannosaurus rex has been the heavyweight champion of the meat-eating dinosaurs. But its reign would not go unchallenged.

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 ...

Scientists have uncovered an apex predator that once ruled the prehistoric world, eclipsing early relatives of the Tyrannosaurus rex (T. rex) in size and dominance. Named Ulughbegasaurus, this newly ...

A provocative study published earlier this year proposed that the world’s best-known and perhaps best-loved dinosaur, Tyrannosaurus rex, was actually three separate species. Not so fast, says new ...