Found in the Lago Colhué Huapi Formation in Patagonia, Argentina, J. casali may have been the apex predator of its Cretaceous-era domain. It was a member of the mysterious dinosaur group megaraptora, ...

The fact that dinosaurs had feathers is starting to become common knowledge, but what's not commonly known is what those ...

In a new study, researchers said they uncovered part of a skull as well as arm, leg and tail bones from the Lago Colhué Huapi ...

NEW YORK (AP) — Scientists have discovered a new dinosaur from Argentina with powerful claws, feasting on an ancient crocodile bone. The new find was possibly 23 feet (7 meters) long and hailed from a ...

The pachycephalosaurs were a unique group of dinosaurs with domed heads. But scientists haven't known much about them because their fossils have been so incomplete. A stunning discovery from southern ...

Paleontologists in Argentina have discovered a new predatory dinosaur -- the fossils of which contained a crocodile bone within the dinosaur's mouth. The new species, dubbed Joaquinraptor casali, is ...

LONDON — A former PhD student analyzing 125-million-year-old fossils has made waves with the discovery of a new species of dinosaur that had a sail on its back. The findings, published in the journal ...

Anyone who has ever flipped open a dinosaur book is likely familiar with pachycephalosaurs. These dome-headed dinos are often depicted ramming the tops of their bowling-ball-like skulls into predators ...

A dinosaur that roamed modern-day Morocco more than 165 million years ago had a neck covered in three-foot long spikes, a weapon on its tail and bony body armor, according to researchers who unearthed ...