A fossilized ancient egg discovered in Antarctica nearly a decade ago has finally been identified, shedding new light on ...

A prehistoric giant flying squirrel once glided over ancient Appalachia but went extinct as the climate cooled. Its fossils, ...

Predators likely included some of the fiercest monsters of the seas, such as the sharp-toothed shark Cretoxyrhina and the giant mosasaur Tylosaurus. Like all plesiosaurs, Styxosaurus's limbs were ...