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This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Anyone who's gone snorkeling at a coral reef lately may have been discouraged from slathering on too much sunscreen.

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In some places, the nonbiodegradable skin protection is actually banned.

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That's because researchers reckon that some four to six thousand tons of sunscreen float off the skin of snorkelers every year,

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enveloping corals in a cloud of chemicals, chemicals that can sicken or even bleach the coral.

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But a more ecofriendly way of saving our skin might be to copy nature's tricks.

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Algae and cyanobacteria produce sunlight-absorbing compounds.

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So do reef-dwelling fish, in the protective slime on their bodies.

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Researchers isolated those molecules, called mycosporines, which absorb both UV-A and UV-B rays.

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Mycosporines have actually been used before in a few SPF products, but in a form that can both penetrate our skin, and easily wash off.

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So the biochemists attached the mycosporines to chitosan, a polymer derived from the shells of shrimp and crabs.

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This hybrid package, they say, is a more effective sunscreen, with constituents too big to pass into the skin, and it's more resistant to washing off.

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It's also hypoallergenic, and did not affect cell development, in in-vitro tests.

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The findings appear in the journal Applied Materials & Interfaces.

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The researchers say that besides providing a superior sunscreen, this material could also lead to more durable paints and plastics,think lawn chairs,

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and other outdoor items that take a beating from light and heat.

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And to be clear, this stuff is not being bottled just yet.

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But it could be soon, they say.

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Which could help protect the environment, in addition to saving our skin.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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