African Oligocene Primates (IMAGE) Ohio University Caption Two fossil discoveries from the East African Rift reveal new information about the evolution of primates, according to a study published online in Nature led by Ohio University scientists. Artist Mauricio Antón depicts the newly discovered fossil primates, Rukwapithecus (front, center) and Nsungwepithecus (right). Credit Mauricio Antón Usage Restrictions Image is embargoed until 1 p.m. EDT, Wednesday, May 15, 2013. Credit (Mauricio Antón) must run with illustration. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.