Agence France-Presse: A massive iceberg twice the size of Manhattan has broken off of a glacier in Greenland, according to NASA satellite imagery, in what could be the latest indication of global warming. The images released Wednesday show the massive chunk of ice breaking off of the Petermann Glacier on the northwestern coast of Greenland. The glacier produced a similar ice island twice as large in 2010. NASA said the crack in the glacier had been visible since 2001, and that its polar-orbiting Aqua satellite had observed...
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