LiveScience: Greenland's ice sheet is on the move, with new images showing its glaciers moving 30 percent faster than they were a decade ago. Greenland and Antarctica are home to the two biggest blocks of ice on Earth. As climate changes, these glacier are shrinking and the water contained in them is moving into the oceans, adding to the already rising sea level. A glacier's velocity is a measure of how fast the ice on the surface of the sheet is flowing toward the edges of the sheet. This flow can be faster...
URL: http://www.msnbc.msn.com/id/47282956
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