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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.

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About three-quarters-of-a-million open heart surgeries take place annually in the U.S., according to the American Heart Association.

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Applying sutures or staples during these procedures costs precious seconds and can cause damage.

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Researchers have sought adhesives that could quickly seal tissue.

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But currently available substances don't work in the presence of liquid, or can't withstand all that forceful pumping, or are toxic.

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So an international team of scientists looked for clues from nature's glues.

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They examined slugs, sandcastle worms and the footpads of insects.

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These organisms release sticky secretions that function even when wet.

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Inspired by the natural adhesives, the research team created their own.

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It only becomes active when exposed to UV light, thus giving surgeons control.

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Once stuck in place, it seals tissue, remains intact in blood, and stays strong and flexible enough to withstand blood flow and the force of a heartbeat.

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And it's biodegradable.

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The substance is described in the journal Science Translational Medicine.

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The glue and patches infused with it have done well on pigs' hearts.

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If human studies show the necessary safety and efficacy, such light-activated patches could make closing some surgical sites like fixing a bike tire.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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