A small glacier crowning one of the Kaçkar Mountains in eastern Turkey appears as a blurry cluster of blue pixels in an image captured in September 2011 by NASA's and U.S. Geological Survey's Landsat 5 satellite. A view of the same glacier, taken by the commercial satellite WorldView-2 in the same month, reveals areas of ice that escaped Landsat, hidden in the shadows cast by nearby peaks or obscured by debris deposits.
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