Under Greenland's frozen surface is a vast network of channels, crevasses, and basins—its "glacial plumbing system." A few years ago, the water suddenly disappeared from a subglacial lake, which then collapsed into a funny silhouette that NASA likens to a "mitten", but I think looks more like a waving Yeti.
via Gizmodo http://ift.tt/1FTnvxS http://ift.tt/1AEply8
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