Paleontologists in Argentina have discovered a new predatory dinosaur -- the fossils of which contained a crocodile bone within the dinosaur's mouth.

In the ancient floodplains of what is now central Patagonia, scientists have uncovered the fossilized remains of a large carnivorous dinosaur unlike anything seen before. This new species, named ...

The find is from a mysterious group of dinosaurs called megaraptorans, which were known for their stretched-out skulls and ...

Speedy megaraptor Joaquinraptor casali had big arms and claws like hedge trimmers that would have made T. rex's forelimbs look puny.