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 ...

The behemoth dinosaurs grew more slowly and had longer lifespans than previously thought, a new study suggests ...

NEW YORK (AP) — Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a ...

The jaw fossil for Tyrannosaurus mcraeensis has key distinctions from T. rex. Paleontologists have discovered a new species of dinosaur that could be the closest-known relative of the famed ...

Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur? At first, researchers had only a tyrannosaur skull to ...

Dinosaurs haven’t roamed the Earth for millions of years, but the nature of their reign has sparked no shortage of controversial debates among paleontologists that remain unresolved today. Late last ...

Pioneering techniques used in this research may soon be applied to other dinosaur fossils and alter the course of ...

T. rex teeth — possibly up to six inches long — were thought by many to be too big not to protrude. In recent years, paleontologists have debunked other stereotypical portrayals of the dinosaur. Some ...