Roughly 230 million years ago, a group of alligator-sized amphibians convened on a floodplain in what is now west-central Wyoming. For some mysterious reason, the creatures all died around the same ...

Some crocodiles are big, sure—but a few are so huge they end up in record books, news reports, or fossil displays. This list ...

A remarkably complete plesiosaur fossil found in southern Germany is shedding light on the early evolution of these iconic ...

A 40-foot-long sea snake sounds like a gimmick to sell Hollywood movies, but what would you do if I told you it once existed?