BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY
Aerial photograph of the Gorner Glacier, Switzerland, the third longest glacier in the Alps. Deep blue meltwater streams, potholes and lakes cover its surface in summer. Meltwater has formed this tube in the ice. On its walls, one can recognize structures shaped by the glaciers creeping movement.
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