Oliver Warr in Moab Khotsong (IMAGE) University of Toronto Caption Researcher Oliver Warr collecting sample in Moab Khotsong, South Africa Credit Oliver Warr Usage Restrictions Image for media use related to this research paper License Original 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.