WASHINGTON (AP) -- A chunk of Antarctic ice nine times the size of Manhattan has suddenly collapsed, putting an even larger glacial area at risk.
Satellite images show the runaway disintegration of a 220-square-mile chunk in western Antarctica.
British scientist David Vaughan says it's the result of global warming.
The rest of the Connecticut-sized ice shelf is holding on by a narrow beam of thin ice and scientists worry that it too may collapse. Larger, more dramatic ice collapses occurred in 2002 and 1995. E-mail to a friend 
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