The suggested valley and possible river (IMAGE) Hokkaido University Caption The suggested valley and possible river flowing from the deep interior of Greenland to Petermann Fjord deep below Greenland's ice sheet (500 meters below sea level). (Christopher Chambers et al, The Cryosphere, November 12, 2020). Credit Christopher Chambers et al, The Cryosphere, November 12, 2020. Usage Restrictions This image is copyrighted but may be used to report this press release if credited as instructed. 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.