Parker's robotic stingray is tiny—a bit more than half an inch long—and weighs only 10 grams. But it glides through liquid with the very same undulating motion used by fish like real stingrays and skates. The robot is powered by the contraction of 200,000 genetically engineered rat heart-muscle cells grown on the underside of the bot. Even stranger, Parker's team developed the robot to follow bright pulses of light, allowing it to smoothly twist and turn through obstacle courses. The fascinating robot was unveiled today in the journal Science. Please Register or Log in to view the hidden image! http://www.popularmechanics.com/technology/robots/a21716/swimming-stingray-robot-rat-cells/ Paper: http://science.sciencemag.org/content/353/6295/158
