The purpose of the looking at the future...is to disturb the present!

Gaston Berger (1896-1960), francuski futurolog

The Mysterious Inner Workings of Io, Jupiter’s Volcanic Moon

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about geologically active moons.
Link :
https://www.wired.com/story/whats-going-on-inside-io-jupiters-volcanic-moon/