"The fossil, part of the legendary 'Dueling Dinosaurs' specimen unearthed in Montana, contains two dinosaurs locked in ...

A paleontologist was trying to locate the site of a famous 1908 discovery when a rancher in Wyoming shared an important clue.

Many of them — including a duck-billed dinosaur mummy discovered in 1908 — hail from an area in eastern Wyoming. In the new study, scientists returned to this so-called mummy zone and found new ...

A long-standing dinosaur mystery has finally been solved, revealing surprising details about a small predator that once lived in the shadow of the mighty Tyrannosaurus rex.

For many years, paleontologists have debated about whether there was a smaller relative of the Tyrannosaurus rex, or if those smaller fossils were really just awkward teenage versions of the king of ...

NC State University and the NC Museum of Natural Sciences discover the nanotyrannus, a smaller dinosaur once thought to be a teenage T-Rex ...

One of two new plant-eaters found in Utah, the species has shaken up a branch of the dinosaur family tree, a new study says.