An aerial view of a crack at the Pine Island Glacier ice shelf is seen in western Antarctica, October 26, 2011. With some 29 km (18 miles) of extension and 50 meters deep, the crack could transform a ... more 
An aerial view of a crack at the Pine Island Glacier ice shelf is seen in western Antarctica, October 26, 2011. With some 29 km (18 miles) of extension and 50 meters deep, the crack could transform a 800 kilometres square iceberg, according to NASA. Picture taken October 26, 2011. REUTERS/NASA/Goddard Space Flight Center/Handout less 
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Thu, Oct 25, 2012 11:00 AM EDT