Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life. An ...

Imagine a world covered in thick ice, hiding an ocean bigger than all of Earth's seas combined. That is Jupiter's moon Europa, long hailed as one of the best bets for alien life in our solar system.

Aliens?! Enchiladas?! What is this world coming to? Or should I say, what is coming to this world? Enceladus is Saturn’s sixth-largest moon, but it would be better described as a winter wonderland.