This synthetic stingray is made of gold, silicone and live muscle cells from a rat. Scientists use pulses of light to guide its propulsion. Karaghen Hudson and Michael Rosnach/Science hide caption

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Synthetic Stingray May Lead To A Better Artificial Heart

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The round stingray is native to the eastern Pacific coast and is notorious for injuring swimmers and surfers. laszlo-photo/Flickr hide caption

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Mild-Mannered Stingrays Can Inflict A World Of Hurt

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