Nature World News: As much as 90 percent of the ice loss in some parts of Antarctica happens beneath the water, according to researchers who report that much more ice is melting from the undersides of submerged ice shelves than previously thought.
Every year 2,800 cubic kilometers leave the Antarctic ice sheet, but for decades the general consensus among scientists was that calving -- where huge chunks of ice break off from glaciers and float out to sea -- was the main source of Antarctic ice loss.
Using satellite...