<i>Rukwapithecus fleaglei</i> Mandible (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 this week led by Ohio University scientists. This image shows a holotype specimen of Rukwapithecus fleaglei (RRBP 12444A), a partial right mandible bearing the lower fourth premolar, first and second molars, and partially erupted third molar, in lateral view. Credit Patrick O'Connor, Ohio University Heritage College of Osteopathic Medicine Usage Restrictions This image is embargoed until 1 p.m., Wednesday, May 15, 2013. Image must run with credit to Patrick O'Connor, Ohio University Heritage College of Osteopathic Medicine. 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.