Scarcity of electricity and abundance of waste are serious global challenges. Fortunately, the UK's Bristol Robotics Laboratory has developed the EcoBot III, a self-sustaining cyborg that's fueled on dirt, leaves, and, well, certain undesirable excrements. The machine is potty-trained to use a litter tray”its predecessors ran on bugs and spoiled fruit”making it a landmark advancement in waste conversion. The EcoBot is part of a larger project to propagate electricity from urine in developing countries. Additionally, NASA has noticed its ability to feed off of fecal matter, making it a potential game-changer up in space.