Gus is about 12.5-feet-tall, 38-feet-long, and could fetch the highest price for any dinosaur ever sold at auction.

A new study published by The Royal Society reveals the disproportionate arms of a T. rex can be linked directly to evolution.

There’s a newly crowned T. rex. This one, called Tylosaurus rex, was a tyrant of the sea and mosasaur spanning up to 43 feet ...

A giant marine reptile that dominated the seas 80 million years ago has been identified as a new species and named "Rex." ...

By Will Dunham May 28 (Reuters) - Tyrannosaurus rex was a huge land predator during the twilight of the age of dinosaurs. But ...

The newly described mosasaur Tylosaurus rex spanned up to 43 feet (13 meters) long and may have been one of the fiercest marine predators of the dinosaur age.

Paleontologists believe that the real T. rex sound was nothing like the roar you hear in the movies. But it's still terrifying! Since the T. rex is one of the most famous predators to ever live, film ...

If your image of Tyrannosaurus rex is based on the ferocious creature in "Jurassic Park," you've gotten quite a few things wrong about the "king of the dinosaurs." In recent years, paleontologists ...