Jupiter's moon Io stands alone among the solar system's moons. It has more than 400 active volcanoes, and its surface is home to more than 100 massive volcanic mountains, some of which are taller than ...

For decades, scientists have been puzzled by the violent eruptions on Jupiter’s moon Io. Now, thanks to Juno’s recent close flybys, we know that Io’s 400 volcanoes are likely powered by individual ...