Saturn's moon, Enceladus, could harbour alien life, scientists have discovered. New findings from NASA's Cassini mission have revealed heat leaking out from the moon's North Pole. This suggests that ...

Saturn's moon, Enceladus, could harbour alien life deep within its underground oceans, according to the European Space Agency (ESA). Although the moon may appear barren, near the South Pole, tiny ...

In the new movie Avatar, humans visit the habitable - and inhabited - alien moon called Pandora. Life-bearing moons like Pandora or the Star Wars forest moon of Endor are a staple of science fiction.