Arizonasaurus was an archosaur from the Middle Triassic.

Megalodons—the iconic extinct sharks that dominated the ocean millions of years ago—have been portrayed in Hollywood blockbusters and sci-fi novels as oversize great white sharks. But new research ...

Rocks formed immediately before and after non-avian dinosaurs went extinct are strikingly different, and now, tens of millions of years later, scientists think they’ve identified the culprit—and it ...

What kid hasn’t dreamed of exploring the world when dinosaurs roamed the earth? Author and illustrator Rachel Ignotofsky put ...