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

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Fruit flies may seem pretty innocuous, to us.

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But in their own little world, male fruit flies are aggressive fighters, who will headbutt and shove each other…even box.

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There is one thing that'll calm them down though: the female touch.

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Researchers raised males with varying amounts of contact with the fruit fly fairer sex.

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And they found that males who'd spent an entire day hanging out with ladies,

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including a chance to copulate were more peaceable than those who had lacked such contact.

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The researchers thought the sex act might be the secret.

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But the sex alone won't do the trick.

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The key to peace was prolonged physical contact with females,

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which causes female pheromones to rub off on the males.

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Those chemical compounds activate about 20 neurons in the male brain,

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which tamp down the brain's aggression circuit, and bingo: no more fighting.

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The results appear in the journal Nature Neuroscience.

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As for human aggression, this study doesn't say much.

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But we do share genes with flies, and our neural circuitry has similarities.

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So the researchers say work on hot-headed flies could someday clue us in to why humans fly into a rage.

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

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