WASHINGTON—An iceberg twice the size of Manhattan tore off one of Greenland's largest glaciers, illustrating another dramatic change to the warming island.
For several years, scientists had been watching a long crack near the tip of the northerly Petermann Glacier. On Monday, NASA satellites showed it had broken completely, freeing an iceberg measuring 46 square miles.http://www.boston.com/news/science/articles/2012/07/17/glacier_in_north_greenland_breaks_off_huge_iceberg/
Article courtesy of Boston.com from the Associated Press by Seth Borenstein/ AP Science Writer
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