NEEM Ice Core Drilling (IMAGE) University of Colorado at Boulder Caption An international drilling team involving CU-Boulder has hit bedrock 1.5 miles below the icy surface of Greenland, pulling up deep ice cores from the last interglacial period that should help climate scientists assess the risks of abrupt climate change on a warming Earth. Credit Image courtesy NEEM ice core drilling project 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.