Floating platform (IMAGE) University of Bonn Caption with which the researchers from the University of Bonn took drill cores from the lake sediment on Lake Iznik (Turkey) and determined the pollen in them. Credit Photo: Thomas Litt/University of Bonn Usage Restrictions This image may be used together with the press release. 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.