Mammals from the Oligocene age. Shown are the Titanothere, Entelodont, Hyracodon, Uintathere, and the Hyaenodou. The six-foot man is drawn to the same scale as the other animals.

Mammals from the Oligocene Mammals

Mammals from the Oligocene age. Shown are the Titanothere, Entelodont, Hyracodon, Uintathere, and the…