Jupiter’s moon points to alien life in outer space—A body of water as big as North America’s Great Lakes could lie beneath Europa, a shining enigmatic moon of Jupiter.

http://www.news.com.au/technology/sci-tech/jupiters-moon-gives-hope-of-alien-life/story-fn5fsgyc-1226198468906

The theory is exciting because water is one of the key ingredients for life. Europa is the second-closest satellite of Jupiter, the biggest planet of the solar system.

Pictures of it sent back by the Galileo spacecraft during its 1995-2003 exploration point to a tortured surface of cracks and jumbled ice.