photo1 (IMAGE) Desert Research Institute Caption Dr. Sandra Brugger examining a sample of concentrated ancient pollen extracted from an ice core that preserved atmospheric particles over 850 years. Photo credit: Jessi LeMay/DRI. 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.