Sediment Core (IMAGE) University at Buffalo Caption University at Buffalo researcher Elizabeth Thomas holds half of a sediment core collected from the lake in western Greenland where the study was sited. Such sediment cores contain aquatic leaf waxes that reveal information about the history of precipitation at a site. Credit Credit: Douglas Levere Usage Restrictions This image may only be used in conjunction with news reports discussing the research outlined in the associated 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.