Eric Scoles: Robots of the Oil Swamp
I could envision great, sealed cities on the edge of seething hydrocarbon swamps habitable only by the most adaptable of organisms, and tended by fleets of fragmentarily sentient fuel-cell powered robots. Eventually, the robots might form their own cities (or be organized into them by a retreating humanity), existing only to tend (and perhaps contain) their swamps.
These robot cultures would evolve; they would not remain static. Evolution would apply to them as it does to us...