All these worlds are yours -- except Titan.

(Upated below.)

Attempt no landing on Titan:

Something is consuming hydrogen and organic molecules on Saturn's moon Titan, and the recipe matches astrobiologists' theories about possible methane-based life.

Out of respect for the interesting possibilities, I've swapped a favorite p3 header back in.

(Update: The buzzkill exobiologists check in here and here to remind us that evidence consistent with methane-based lifeform theories is not itself proof, although it's nevertheless pretty interesting.

Meanwhile, take my advice: O-nay andings-lay.)