> Not optimistic about the possibility of life in Europe. Is that a typo or a comment on the current political situation? Anyway, a couple of meters of water

> Not optimistic about the possibility of life in Europe. Is that a typo or a comment on the current political situation? Anyway, a couple of meters of water would block all radiation, and the energy source would be tidal forces from Jupyter, not the Sun (which is what would also keep the core warm enough for liquid water. Also why Io has intense volcanic activity).