Oligocene mammals from Ethiopia and faunal exchange between Afro-Arabia and Eurasia. John Kappelman 1, D. Tab Rasmussen 3, William J. Sanders 4, Mulugeta Feseha 2, Thomas Bown 5, ...

Now researchers have confirmed that an ancient dolphin that lived during the Oligocene Epoch — 33.9 million to 23 million years ago — was the first cetacean (a type of mammal) using ...

They are considered the largest land mammal that ever lived — but their ... Ecological reconstruction of giant rhinos and their accompanying fauna in the Linxia Basin during the Oligocene.

Their results show that all five mammal groups suffered huge losses around the Eocene-Oligocene boundary. "It was a real reset button," said Dorien de Vries, a postdoctoral researcher at the ...

The maximum size of mammals began to increase sharply about 65 million years ago, peaking in the Oligocene Epoch (about 34 million years ago) in Eurasia, and again in the Miocene Epoch (about 10 ...

Mammals exploded in size after dinosaurs went extinct and continued to grow for about 25 million years, ... About 34 million years ago, during the early Oligocene epoch, ...

The teeth De Vries is working with are up to 56 million years old—they once belonged to the mammals of the late Eocene, Oligocene, and Miocene Epochs and are now preserved in museum and ...

A tooth of an extinct mammal, possibly dating back to around 20 million years ago, ... The Oligocene is a geologic period that lasted from around 33.9 million to 23 million years ago, ...

Now researchers have confirmed that an ancient dolphin that lived during the Oligocene Epoch — 33.9 million to 23 million years ago — was the first cetacean (a type of mammal) using ...

Now researchers have confirmed that an ancient dolphin that lived during the Oligocene Epoch — 33.9 million to 23 million years ago — was the first cetacean (a type of mammal) using ...