A large section of the mighty West Antarctica ice sheet has begun 
falling apart and its continued melting now appears to be unstoppable, 
two groups of scientists reported on Monday. If the findings hold up, 
they suggest that the melting could destabilize neighboring parts of the 
ice sheet and a rise in sea level of 10 feet or more may be unavoidable 
in coming centuries.

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http://www.nytimes.com/2014/05/13/science/earth/collapse-of-parts-of-west-antarctica-ice-sheet-has-begun-scientists-say.html