Travel back in geologic time with our detailed coverage on dinosaurs, from fossil discoveries to new research illuminating the extinction of species such as tyrannosaurs, pterosaurs, and megalodons.

Dinosaurs' extinction "re-engineered" Earth's surface, according to new research. The reptiles had such an "immense" impact on the planet that their sudden exit led to wide-scale changes in landscapes ...

The cast of the skull of Nigersaurus. The fossil skull of Nigersaurus was one of the first dinosaur skulls to be digitally reconstructed from CT scans. Photograph by Ira Block, Nat Geo Image ...

Two Spinosaurus hunt Onchopristis, a prehistoric sawfish, in the waters of the Kem Kem river system in what is now Morocco. Davide Bonadonna For the first time in history, researchers say they have ...

A newly unearthed fossil has led experts to believe an ancient species of crocodile may have been an apex predator that hunted dinosaurs on land. Paleontologist and National Geographic Explorer ...

The Jurassic period was characterized by a warm, wet climate that gave rise to lush vegetation and abundant life. Many new dinosaurs emerged—in great numbers. Above, Dimorphodon reptiles fly over a ...