During the Eocene Epoch, which spanned 56-34 million years ago, gigantic ancient elephant-like animals began to roam through ...

Scientists have discovered a nearly complete skull of a Hyaenodonta, a hypercarnivore that that lived during the Oligocene Epoch some 20 million years ago. Scientifically known as Bastetodon syrtos, ...

which all died out at the end of the Eocene epoch, according to the American Museum of Natural History. That was about 34 million years ago. The animal had a large body, short legs, and a ...