A dictionary with entries for all known dinosaurs, about 300 at last count, and other animals of the Mesozoic Era, as well as general topics relating to dinosaurs, from Acanthopholis to Zigongosaurus.

A new dinosaur has been discovered in Utah by North Carolina researchers and paleontologists. They believe it was a burrowing species. Now there is a new dinosaur species on the paleontology block, ...

Dome-headed dinosaurs, officially called pachycephalosaurs, are one of the “most enigmatic” creatures from the Cretaceous (145 million to 66 million years ago). While these herbivores often appear in ...

When dinosaurs ruled the Earth, we tend to think of the mammals at the time — including our distant ancestors — as small and quivering in the shadows. "We've always had this picture of mammals as the ...

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction. New research suggests dinosaur populations were still ...