Ross Powell and Reed Scherer (IMAGE) Northern Illinois University Caption Northern Illinois University professors Ross Powell (left) and Reed Scherer gather up sediment core samples from a multi-corer during a 2012-13 expedition to Antarctica's Ross Sea region. Credit Northern Illinois University Usage Restrictions Credit Northern Illinois University 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.