Researchers (image) University of Bonn Share Print E-Mail Caption Dr. Margret Bülow (left) and Dr. Julia Sellin at the LIMES Institute at University of Bonn. Credit (c) Photo: Barbara Frommann/Uni Bonn Usage Restrictions This photo may be used with the press release. Share Print E-Mail 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.