Researchers have counted 16,600 fossilized dinosaur footprints and 1,378 swim tracks at a site in Bolivia that showcase a variety of behaviors and different theropods from the Cretaceous period. When ...

"The first thing that struck me about this animal is the incredible robustness of the limb bones," said McPhee, lead study author. "It was of similar size to the gigantic sauropod dinosaurs, but ...

If humans had lived 200 million years ago, they would have marveled at the largest dinosaur of its time. It's name means "a giant thunderclap at dawn." The recently discovered fossil of a new dinosaur ...