A fossil of the 23-foot-tall predator could help unlock secrets of an order of dinosaurs that remain poorly understood.

A significant discovery in Big Bend National Park has revealed a massive fossil belonging to Alamosaurus, the largest known land-dwelling dinosaur in North America. The find was reported in an ...

The new dinosaur, named Joaquinraptor casali, was about 23 feet (7 meters) long and weighed over 2,200 pounds.

A fossil from about 108 million years ago reveals an early member of the pachycephalosaurs, a group of dinosaurs with bizarre ...

A newly discovered dinosaur species has been identified from a fossil unearthed in Mongolia that represents the most complete ...

The skeleton was nearly complete and the skull was in such good condition that its teeth still bore a coating of enamel, the study's lead author says.

A 165-million-year-old ankylosaur from the Atlas Mountains of Morocco was covered in an array of extreme armour including body spikes fused to its skeleton, a feature never seen in any dinosaur before ...

(CNN) — Tens of millions of years ago, an apex predator resembling a giant crocodile stalked the humid freshwater floodplains of southern Patagonia. Measuring up to 11.5 feet (3.5 meters) long and ...

The oldest evidence of the pachycephalosaur species of dinosaurs was found in Mongolia’s Gobi Desert and was the most ...

Kostensuchus atrox, a dinosaur-eating predator related to crocodiles, revealed in study after fossils discovered in Argentina.

The new fossil was unearthed in a remote part of Argentinian Patagonia—and had teeth comparable to a T. rex, says National ...

Scientists discovered Agriodontosaurus helsbypetrae, a tiny ancient lizard with oversized teeth, changing the story of lizard ...