Which moon of Jupiter, with its cracked icy surface, is a prime target for NASA's search for subsurface oceans and possible life?
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Europa
Europa is covered in a thick crust of ice, but tidal heating from Jupiter’s gravity is thought to keep a vast liquid ocean beneath it. Scientists believe this ocean could contain more than twice as much water as all of Earth's oceans combined.
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- Which of the four Galilean moons is the smallest and is thought to harbor a liquid ocean beneath its icy surface?