The skull dates back to the early Oligocene Epoch around 30 million years ago, according to a study published Monday in the Journal of Vertebrate Paleontology. When the study authors uncovered the ...

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 ...

This period is also called the “Age of Mammals”. During the Oligocene epoch about 33.9 to 23 million years ago, most mammals remained small, but one giant, Paraceratherium, stood out.

Badlands National Park is a vast wilderness of jagged buttes, spires and pinnacles, mixed-grass prairies, and the world’s richest trove of fossils from the Oligocene epoch, estimated at 23 to 35 ...