Subglacial valleys beneath Greenland's ice sheet mapped by NASA

NASA Earth Observatory has released a new map detailing hundreds of previously unrecorded or fragmented valleys beneath the Greenland Ice Sheet. This advanced mapping technique reveals extensive, straight valleys in the west-central region, some newly identified and others shown to extend further inland. This discovery enhances understanding of Greenland's subglacial topography, which is crucial for modeling ice sheet dynamics and predicting future sea-level rise.