This is like two years old, but I hadn't heard of it, and it is super creepy and interesting: a clock-displaying robot thing powered by houseflies. How is it powered by houseflies? Does it harness the energy in their beating wings or something? Oh, no, no, no. That wouldn't be creepy enough. It eats them. Well, technically, bacteria do, and the robot steals their energy. Is it unfair to consider the bacteria to be part of the robot? You tell me.