Where To Look For Life In Space

A tour of places in our solar system where life could persevere
Planet material
At its heart, this large Jovian satellite (at 1,940 miles wide, a smidge smaller than our own) has an extensive ocean and possible undersea volcanoes. A proposed mission would investigate whether its conditions are conducive to life. Artist's concept, NASA/JPL-Caltech

This article was originally published in the February 2015 issue of Popular Science, to accompany the feature “Have We Found Alien Life?