Mission Accomplished (IMAGE) Columbia Climate School Caption Researchers William D’Andrea (left) and Gregory de Wet load sediment cores taken from the lake bed. Credit Nicholas Balascio/the College of William & Mary Usage Restrictions Credit must be given. 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.