Therizinosaurus is proof that dinosaur evolution wasn’t always driven by speed, power, or predation. Instead, this theropod grew massive claws that functioned more like gardening tools than weapons.

Researchers say they have identified a new species of Tyrannosaurus that traces the dino's lineage to North America much earlier than previously thought, and could shed new light on the murky origins ...

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 ...

The Tyrannosaurus rex seemingly came out of nowhere tens of millions of years ago, with its monstrous teeth and powerful jaws dominating the end of the age of the dinosaurs. How it came to be is among ...

A formerly unknown relative of the most iconic of all dinosaurs, Tyrannosaurus rex, has been newly identified, according to a study released Thursday. The revelation adds a new clue that could help ...

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 ...

An "utterly bizarre" dinosaur with claws so gigantic that their function has long remained a mystery couldn't use them to fight or fend off attackers because they were too flimsy, a new study has ...

Call it shovel and pail-eontology. Three North Dakota boys made the extraordinary discovery of a highly rare Tyrannosaurus rex fossil that could change what we know about dinosaurs. Now, the ...

While we don't like to talk ill of the dead, new physiological analysis has found that the king of the dinosaurs was not so smart after all. It upends previous research that last year likened the ...

When it roamed the Earth 80 million years ago, a 40-foot-long Tyrannosaurus rex was one of nature's most terrifying prospects. Soon, it could be a purse. A group of researchers and bio-engineers in ...