Paleontologists have discovered a new species of megaraptor dinosaur in Argentina, along with a startling clue about what it ate. Named Joaquinraptor casali, the apex predator apparently ate ...

A reconstruction of the newly discovered megaraptor Joaquinraptor casali from Argentina with a Cretaceous-era crocodile arm in its mouth. Illustration by Andrew McAfee, Carnegie Museum of Natural ...

Giant 20-foot-long raptor dinosaurs once roamed Australia, according to a new study that could rewrite the evolutionary history and hierarchy of predators on the continent. The research, published in ...

The name 'Megaraptor' almost sounds made up - the product of a hollywood monster movie; a Jurassic World hybrid dinosaur, perhaps. While scientists do tend to give dinosaurs more dramatic names than ...

While the great Tyrannosaurus rex stalked prehistoric North America, a very different apex predator prowled ancient Argentina: the newly discovered megaraptor Joaquinraptor casali. When ...