Diatom (3 of 3) (IMAGE) Rice University Caption Ohio State University climatologist Lonnie Thompson, left, and his colleagues handle an ice core pulled from the Quelccaya Summit Dome Glacier in Peru during their 2003 expedition. Credit Ohio State University Usage Restrictions None 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.