Robo-planetoid

The planetoid is an unnamed planetoid inhabited by robots. The Planet Express crew followed Professor Hubert J. Farnsworth here when he was fed up by ignorant Earthicans in 3010. Though then a lifeless planetoid, it had highly toxic amounts of water that the Professor made drinkable with nanobots. The nanobots, however, evolved, creating an evolution much like that of Earth, except with robots and thus much faster. Only days later, the robots had evolved past human technology and had turned into robotic gas forms.

Allusions
The robotic gas forms are in reference to a short story by, featuring similar creatures on Mars.