Drilling through Ice (IMAGE) Columbia Climate School Caption To study the advance and retreat of glaciers over nearly 10,000 years, scientists extracted sediment cores from the bottom of glacier-fed Kulusuk Lake in southeast Greenland. Credit William D'Andrea Usage Restrictions Credit must be given. 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.