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Press Conference (7/24/15) - William McKinnon, Slide 2c
Release Date: July 24, 2015
Annotated image of the northern region of Pluto's Sputnik Planum, swirl-shaped patterns of light and dark suggest that a surface layer of exotic ices has flowed around obstacles and into depressions, much like glaciers on Earth.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute