Encased in thick ice, encased in oceans, Enceladus is a small moon of Saturn  An unmanned Cassini probe has detected hydrogen molecules in a column of gas spewing from a crack in Enceladus'surface
Evidence of the absence of life on Jupiter's moons had previously been obtained through the Hubble Space Telescope
 Scientists theorize that a hydrothermal reaction is probably taking place between Enceladus'rocky core and the ocean beneath its icy crust, which means the moon is almost ready to support life, in the future, people could explore Enceladus for signs of life