Ice core samples (IMAGE) Desert Research Institute Caption Longitudinal ice core samples awaiting analysis for lead and other chemicals using the continuous ice core analytical system at the Desert Research Institute (credit: Jessi LeMay) Credit Jessi LeMay/DRI Usage Restrictions For use with credit 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.