New NASA research found that large crevasses provide aquifer water upstream of Greenland's Helheim Glacier with a clear escape to the ocean. This discovery helps confirm that the water, which is held in a layer of crunchy, granular snow called firn, contributes to sea level rise.

Music credit: Dark Clouds by Anders Paul Niska and Klas Johan Wahl

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Credit: NASA's Goddard Space Flight Center/Kathryn Mersmann

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