This is a biggie(or at least will be, I'm sure of that). You might want to read my blog post about Saturn, the planet it orbits. It's getting a lot of attention right now along with Europa, as a planet that might possess life. Though there's surely a lot of aliens in the whole wide space, the closest might be here.
What's so great about this? It turns out, it turns out really cool.
In 2005, a small spacecraft called Huygens actually landed on Titan and took some pictures. As it was descending to the surface, Huygens took photos of what seems like a river flowing into an ocean on Titan! Though the liquid would probably be methane, it's really cool to know that sea of some kind exists in space.
I think there's a lot of chance there's life here. Though(if it exists) it'll probably be teeny microbes, it's still amazing.