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Iceberg Four Times Size of Manhattan May Hamper Ships

A chunk of ice four times the size of Manhattan broke away from Greenland and may drift toward shipping lanes in the North Atlantic and off the Canadian coast, researchers said.

The 100-square mile ice island, with enough stored water to keep the Hudson River flowing for more than two years, split off from the Petermann Glacier last week, according to Andreas Muenchow, an associate professor of ocean science and engineering at the University of Delaware.