Prof. Dr. Thomas Litt and Manuela Rüßmann (IMAGE) University of Bonn Caption with drill cores from Lake Van at MARUM, the Center for Marine Environmental Sciences in Bremen, where the cores were stored. Credit Photo: Nadine Pickarski/Uni Bonn Usage Restrictions This photo may be used with the press release. 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.