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 ...

For decades, motorists speeding down Interstate 90 in west-central South Dakota have done double takes at a towering human skeleton leading a T. rex on ...

A new study has found that the T. rex's arms evolved to become smaller at the same time as its head grew to catch more prey ...

A Royal Society research paper published May 20 suggests that T. rex, which averaged more than 40 feet long with arms ...

Just when you thought it was safe to go back in the water, scientists have discovered a giant, bus-size sea predator that was ...

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.

Dinosaurs haven’t roamed the Earth for millions of years, but the nature of their reign has sparked no shortage of controversial debates among paleontologists that remain unresolved today. Late last ...

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 ...

Is a mysterious, small tyrannosaur fossil from Montana just a juvenile? Or did tiny tyrannosaurs once walk the Earth? New research published in the journal Nature on October 30 offers evidence that ...