Lakes detected under Antarctica

Lasers beamed from space have detected big lakes of water underneath the ice in Antarctica. These lakes, some stretching across hundreds of square miles, fill and drain so dramatically that the movement can be seen by a satellite looking at the icy surface of the southern continent. The lakes lie beneath 2,300 feet of compressed snow and ice. About 90% of the world's fresh water is locked in the thick ice cap that covers Antarctica.

(Also see this previous blog post on Antarctica's ice caves).