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With gold and rat heart cells, scientists make a robot stingray

With gold and rat heart cells, scientists make a robot stingray

Here’s a critter that would be a showstopper in your aquarium: By layering rat heart cells over a gold skeleton, scientists have built tiny swimming artificial stingrays that can be driven and guided by light.

These little ray-bots, described in the journal Science, may offer insight into building soft robotics, studying the human heart — and perhaps even building an artificial one from scratch.

Senior author Kit Parker, a Harvard bioengineer, first got the idea for these tiny ray-bots when his young daughter tried to pet a stingray at an aquarium and it quickly and...

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