Surprisingly, Earth’s creatures were highly diverse during the Carboniferous and Permian Eras (the time before dinosaurs) and also enormous. Unearth the nine massive prehistoric animals that ...

Less than 5 percent of the animal species in the seas survived ... For years scientists have known that the deep ocean lacked oxygen in the late Permian. But most life is concentrated in shallow ...

The origin of mammals is shrouded in mystery, but every fossil clue helps rewrite the story. A new discovery on a Mediterranean island is challenging what we know about when—and where—mammal ancestors ...

About 252 to 199 million years ago, all the continents were actually one huge “supercontinent” surrounded by one enormous ocean ... In the Permian period before, the largest mass extinction ...