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August 28, 2014

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This combination of Dec. 10, 2013, left, and March 11, 2014 photos provided by NASA shows a large iceberg separating from the Pine Island Glacier and traveling across Pine Island Bay in Antarctica. Scientists are watching the iceberg, which is bigger than the island of Guam, as it slowly moves away from the glacier, bottom right in December, upper left center in March.

AP Photo/NASA

This combination of Dec. 10, 2013, left, and March 11, 2014 photos provided by NASA shows a large iceberg separating from the Pine Island Glacier and traveling across Pine Island Bay in Antarctica. Scientists are watching the iceberg, which is bigger than the island of Guam, as it slowly moves away from the glacier, bottom right in December, upper left center in March.