Billions of Tyrannosaurus rex roamed North America during their fascinating reign as top predators, according to a team of researchers that went about the daunting task of making the calculation.

DENVER (WKRC/KUSA/CNN Newsource) - Scientists at the Denver Museum of Nature and Science made an unexpected discovery right beneath their feet while conducting research in the museum's parking lot.

Paleontologists are being forced to compete with rich collectors for access to dinosaur skeletons. When it comes to T. rexes in particular, the outcome is predictable, and science is suffering, a new ...

One Tyrannosaurus rex seems scary enough. Now picture 2.5 billion of them. That’s how many of the fierce dinosaur king probably roamed Earth over the course of a couple million years, a new study ...

The Denver Museum of Nature and Science just got a reminder of an old lesson - location, location, location. The museum has a very popular dinosaur exhibit. You can even take a selfie with a T. rex ...

(CNN) — The phrase “leave no stone unturned” has taken on new meaning for paleontologists at the Denver Museum of Nature and Science who discovered a special fossil hidden right under their noses — ...