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August 30, 2013 01:48 pm PDT

Massive canyon hidden below Greenland'sice

Scientists using radio waves to estimate the thickness of the ice sheet that covers Greenland found a canyon — more than 2600 feet deep and almost 500 miles long — buried under the ice.







Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/w0TGbV6eUvQ/story01.htm

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