Professor Dr Joseph Hoffman (IMAGE) Bielefeld University Caption Professor Dr Joseph Hoffman from Bielefeld University led the international study on the genetic history of northern elephant seals. Credit Bielefeld University/Sarah Jonek Usage Restrictions The image may only be used with appropriate caption and credit. 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.