JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY
Pliocene fauna. Artwork of prehistoric African mammals around a water hole on a savannah during the Pliocene Epoch. This period ranged from 5.3 million to 2.5 million years ago. Shown here are prehistoric forms of antelope, rhinoceros, zebra, and elephants.
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