New Map Reveals Secrets of Io, the Solar System's Most Volcanic Moon
The best-yet map of active volcanoes on Jupiter’s moon Io hints at a hidden magma ocean—and more
![New Map Reveals Secrets of Io, the Solar System's Most Volcanic Moon](https://static.scientificamerican.com/sciam/cache/file/622F1DC9-4033-4E10-A4CE9074A0EF11E8_source.jpg?#)
The best-yet map of active volcanoes on Jupiter’s moon Io hints at a hidden magma ocean—and more
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