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 prehistoric creature is thought to have lived around 280-270 million years ago and was likely a "top predator" in its day ...