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VIDEO TRANSCRIPT BELOW So there's now such a thing as a cyborg stingray, a tiny mimic of the real thing that uses living tissues to get around — way cooler than those boring old robot stingrays. The cyberray is made out of a gold skeleton, a silicone body and — this is the cool part — a thin coating of rat heart cells. The cells are engineered to beat in response to flashes of light. That means you can make the ray swim by shining flashing lights at it. The scientists were even able to steer the stin
