A new look at the "Dueling Dinosaurs" fossil reveals that Tyrannosaurus rex was not the only tyrannosaur roaming the land.

Paleontologists have long debated whether small tyrannosaurs were their own species or simply teenage T. rexes. This debate ...

There are literally decades of research... based on a premise that this article overturns,” said one paleontologist.

A new giant dinosaur was recently discovered in the Patagonia region of Argentina with short arms reminiscent of a Tyrannosaurus rex. Like the T. rex, which was one of the largest dinosaurs to have ...

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 ...

A fossilized partial dinosaur skull originally thought to be from a Tyrannosaurus rex might actually represent a previously unknown species, according to a paper published Thursday in the journal ...

To calculate how the tail propelled the T. rex, the researchers scanned and modeled an adult T. rex specimen at the Naturalis Biodiversity Center in Leiden known as "Trix," pictured here. Rique via ...