National Geographic: A vast aquifer "lake" lies trapped under southeastern Greenland, scientists report, based on ice core results. The finding may help reveal a changing climate's effects on the world's massive, but shrinking, ice sheets.
Greenland's ice sheet, the second largest in the world, covers some 656,000 square miles (1,710,000 square kilometers). Together with Antarctica's even more vast ice sheet, its melting in a warming climate is a big factor in projections of future sea-level rise.
That is why the...