<ul><li>NASA scientists have solved the mystery of why Jupiter's moon Io is volcanically active.</li><li>Io, slightly larger than our moon, has about 400 volcanoes and plumes from eruptions can be seen from Earth.</li><li>Data collected by NASA's Juno spacecraft during flybys of Io revealed that the moon's volcanism is fueled by its tidal flexing caused by gravitational forces from Jupiter.</li><li>The research findings have implications for understanding planetary formation and evolution.</li></ul>

NASA solves 44-year-old mystery of why Jupiter's Io is so volcanically active

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