Ice fishing on Europa?

For a long time, astronomers have believed that Jupiter's moon Europa (along with two of the other Galilean moons, Ganymede and Callisto- all three of which, along with the volcanic Io, are visible in a good pair of binoculars) is the best candidate for extraterrestrial life in our solar system.

The three moons are believed to be covered by global, ice-encrusted oceans, containing sufficient oxygen to support life and warmed by the tidal pull on their cores exerted by Jupiter and its other moons.

But now, evidence is increasing that Europa in particular is an even better candidate to be the abode of life than we had thought.