In 2007, scientists used NASA satellite measurements to reveal 14 areas of moving water beneath West Antarctica; one hidden lake had drained about 2 cubic kilometres in three years

Antarctica may look like a vast, frozen and unchanging landscape, but deep beneath its thick ice lies a surprisingly active world. In 2007, scientists reported findings based on measurements collected by NASA’s ICESat satellite between 2003 and 2006, revealing major changes in the surface of the West Antarctic Ice Sheet and signs of water moving through hidden lakes far below.

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