The rise of dinosaurs is one of evolution's most intriguing success stories. Emerging in the mid-Triassic period, their ...

LOS ANGELES - What did giant plant-munching dinosaurs do when they couldn't find enough to eat in the parched American West? They hit the road. An analysis of fossilized teeth adds further evidence ...

A fossil from the blustery plains of Patagonia is revising your book on one of the most elusive bands of hunting dinosaurs. The newly discovered dinosaur, Joaquinraptor casali, preyed on the soggy ...

Paleontologists have discovered a new species of megaraptor dinosaur in Argentina, along with a startling clue about what it ate.