A new analysis of fossils believed to be juveniles of T. rex now shows they were adults of a small tyrannosaur, with narrower jaws, longer legs, and bigger arms than T. rex. The species, Nanotyrannus ...

It's known as the "Dueling Dinosaurs" fossil: A triceratops and a tyrannosaur, skeletons entangled, locked in apparent combat right up until the moment of their mutual demise. Even in the Hell Creek ...

The most ferocious predator of the ancient world had a smaller, lightweight cousin: a new species of tyrannosaur uncovered in a Raleigh laboratory. For years, paleontologists at the NC Museum of ...

Paleontologists have long debated whether small tyrannosaurs were their own species or simply teenage T. rexes. This debate just got a major shake-up. Reading time 3 minutes Researchers claim to have ...