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

At the twilight of the age of dinosaurs, an agile and vicious predator named Nanotyrannus prowled western North America, ...

A new specimen of one of the most controversial species of dinosaur has the potential to overturn decades of research on the ...

Specifically, whether or not certain fossils found in Montana belonged to a young Tyrannosaurus rex or a completely separate, ...

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

More than 60 million years on from its final day on Earth, there's a dinosaur we owe an apology. Paleontologists confirm that the Tyrannosaurus rex locked in combat with a Triceratops in the famous ...

MISSOULA, Mont. — ATyrannosaurus rex skeleton comprised of specimens found in Montana and Wyoming is expected to fetch millions when it goes to auction in Zurich,Switzerland on Tuesday. TRX-293 ...