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Cracked Up
Featured on August 12, 2013
Ice cliffs thousands of feet high criss-cross the surface of Dione, one of the large moons of Saturn, in this view from the Cassini spacecraft. The cliffs indicate that Dione has undergone recent tectonic activity that has cracked the crust. Recent Cassini observations suggest that an ocean of liquid water may lurk beneath the crust. [NASA/JPL/SSI]
