These ancient mammals were far larger than their modern relatives. Some species that lived during the Oligocene and Miocene epochs grew to the size of today's wolves and jaguars and were able to ...

More than two-thirds of mammals in Africa and the Arabian Peninsula went extinct during the Eocene-Oligocene transition some 30 million years ago, a study finds. Chloe Tenn is a graduate of North ...

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.

Wilson (1938-1946), and Harold Koerner (1946-1971), who helped expand the collection of Cenozoic mammals. Clark’s primary work focused on the Eocene Green River Formation in Utah and the ...

bone samples of mammals from the Oligocene beds of Hsanda Gol; (5) mammalian bones from the Miocene beds of Beger Nur; (6) bones of rhinoceroses from the Pliocene beds of Altan Teli; and (7 ...