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

What if everything we know about T. rex growth is wrong? A complete tyrannosaur skeleton has just ended one of paleontology's ...

A new study shows that 67-million-year-old fossils originally discovered around eighty years ago, are that of an adult ...

The “dueling dinosaur” fossil still leaves more questions than answers as scientists now attempt to determine their causes of ...

By Will Dunham WASHINGTON (Reuters) -At the twilight of the age of dinosaurs, an agile and vicious predator named ...

Scientists have unveiled a previously unknown tyrannosaur species that fundamentally changes our understanding of how the mighty Tyrannosaurus rex evolved. The newly identified dinosaur, named ...

The Tyrannosaurus Rex has long been the creature of nightmares — but the "King of Tyrant Lizards" had a cousin who may have been just as terrifying. With the help of a paleontology enthusiast, ...

Tyrannosaurus rex was more of a scavenger than a hunter, researchers say. Feb. 23, 2011— -- The blood-thirsty Tyrannosaurus rex of our favorite books and movies may not be so ferocious after all.

To describe the essence of Tyrannosaurus rex, the most terrifying predator that ever lived, University of Chicago paleontologist Paul Sereno offers this: “Jaws on fast-running legs.” The monster had ...

The fossilized remains of a new horse-sized dinosaur reveal how Tyrannosaurus rex and its close relatives became top predators. The fossilized remains of a new horse-sized dinosaur reveal how ...

A dinosaur belonging to the same evolutionary branch as the famous Tyrannosaurus rex has just been discovered. Lythronax argestes possesses several unique features, a short narrow snout with a wide ...