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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Anyone who's gone snorkeling at a coral reef lately may have been discouraged from slathering on too much sunscreen.
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3 .In some places, the nonbiodegradable skin protection is actually banned.
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4 .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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5 .enveloping corals in a cloud of chemicals, chemicals that can sicken or even bleach the coral.
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6 .But a more ecofriendly way of saving our skin might be to copy nature's tricks.
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7 .Algae and cyanobacteria produce sunlight-absorbing compounds.
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8 .So do reef-dwelling fish, in the protective slime on their bodies.
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9 .Researchers isolated those molecules, called mycosporines, which absorb both UV-A and UV-B rays.
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10 .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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11 .So the biochemists attached the mycosporines to chitosan, a polymer derived from the shells of shrimp and crabs.
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12 .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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13 .It's also hypoallergenic, and did not affect cell development, in in-vitro tests.
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14 .The findings appear in the journal Applied Materials & Interfaces.
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15 .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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16 .and other outdoor items that take a beating from light and heat.
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17 .And to be clear, this stuff is not being bottled just yet.
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18 .But it could be soon, they say.
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19 .Which could help protect the environment, in addition to saving our skin.
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20 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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