For a long time, scientists assumed that the tiny water pools at Europa's surface came from the moon's deep, icy oceans. But is that physically possible?

Europa, one of Jupiter’s icy moons, long has fascinated scientists because of what may lie beneath its frozen shell: a global ocean of liquid water. That hidden ocean has made…

For a long time, scientists assumed that the tiny water pools at Europa's surface came from the moon's deep, icy oceans. But is that physically possible?