Alien life could exist on Saturn's big moon Titan — but finding it will be tough

This artist's concept of a lake at the north pole of Saturn's moon Titan illustrates raised rims and rampart-like features as seen by NASA's Cassini spacecraft.

With rivers, lakes and even seas made of liquid methane and ethane, plus a hidden underground ocean of water, Saturn's moon Titan has long fascinated scientists as a place where alien life might exist.

A new study backs up that idea — but with a twist. Yes, alien life could be there, researchers say, but probably not in the abundance we once hoped.