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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber.This'll just take a minute.
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2 .It's boating season.
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3 .Which means it'll soon be time for that annoying ritual, the scraping of the barnacles.
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4 .They latch on tight and don't let go.
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5 .Barnacles can be a major pain: as they grow they build up calcium deposits under a boat's paint.
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6 .And their interference with smooth fluid flow can decrease fuel efficiency by up to 40 percent, a major problem for large vessels.
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7 .Currently, hull paint can be doped with poison, usually based on copper oxide, that leaches out slowly to kill the little critters.
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8 .But the poison also escapes into the water and can kill other marine life.
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9 .Now, researchers might have a better option: a paint additive that kills just the barnacles, using their own behavior against them.
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10 .It's a toxin based on a molecule created by a bacterium.
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11 .The researchers developed a method of embedding that toxin into the paint so that it only gets released when the barnacle penetrates the paint.
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12 .The info was published in a university thesis.
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13 .The scientists determined that the toxin works in low concentrations and could be effective for years.
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14 .Which could lower the cost of paying the barnacle bill.
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15 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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