BEWARE: a hungry, flesh-eating robot called Chew Chew could have designs on you. Not that you won't hear the beast coming: Chew Chew is a 12-wheeled monster that looks more like a train. But he's also the first robot to be completely powered by food. He's called a gastrobotand he is set to make his public debut in August, at a robotics conference in Hawaii.
Chew Chew's "stomach" is a microbial fuel cell (MFC), a device that enslaves a population of bacteria, in this case
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