One end of the rift in Antarctica's Pine Island Glacier, seen from the NASA IceBridge DC-8 on Oct. 23, 2012. Since its discovery the crack has spread and is now less than one kilometer from completing... more 
One end of the rift in Antarctica's Pine Island Glacier, seen from the NASA IceBridge DC-8 on Oct. 23, 2012. Since its discovery the crack has spread and is now less than one kilometer from completing and producing a large iceberg. less 
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LiveScience.com | Photo By NASA/George Hale.
Tue, Nov 20, 2012 2:10 PM EST