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July 18, 2012 (14 images)

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The Petermann Glacier grinds and slides toward the sea along the northwestern coast of Greenland, terminating in a giant floating ice tongue. Like other glaciers that end in the ocean, Petermann periodically calves icebergs. The Moderate Resolution Imaging Spectroradiometer, or MODIS, on NASAÕs Aqua satellite observed the new iceberg calving and drifting downstream on July 16Ð17, 2012. UPI/NASA
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