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

The new species is called Nanotyrannus. Compared to the well known tyrannosaurus rex, a nanotyrannus was more speedy and agile.

Paleontologists may have discovered when plant-eating dinosaurs evolved their long necks after a new species of sauropodomorph was found in Argentina.

A new dome-headed dinosaur species was discovered in Montana, a study released this month shows. Researchers discovered the fossils of Brontotholus harmoni, a dome-headed dinosaur in Montana, according to the paper published Oct. 9 in the Zoological Journal of the Linnean Society.

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.

A trove of specimens from New Mexico may help settle a long-running argument about the diversity of dinosaurs before their extinction.

There are literally decades of research... based on a premise that this article overturns,” said one paleontologist.

Paleontologists in North Carolina say they have evidence that a tyrannosaur species coexisted with T. rex, a speedy and agile creature called Nanotyrannus. "This fossil doesn't just settle the debate.