Vanishing Bottom-First: Map Reveals Thawing Areas Under Greenland

The new map, created by NASA scientists, is the first of its kind and shows regions underlying the ice sheet that are likely thawed or frozen, as well as areas where the state remains unknown. "We're ultimately interested in understanding how the ice sheet flows and how it will behave in the future," Joe MacGregor, lead author of the new research and a glaciologist at NASA's Goddard Space Flight Center, said in the statement.