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

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A baby's cries for food might drive a tired parent to aggravation.

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But some species take more drastic measures.

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Like the burying beetle, Nicrophorus vespilloides,

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which punishes its pesky children by eating them.

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Researchers wanted to get to the bottom of an age-old question in evolutionary biology: the origin of begging.

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Natural selection favors a greedy, well-fed child.

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But it also favors parents who dole out food evenly to their young, and save some for themselves.

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So how do you resolve that parent-child conflict?

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Burying beetles do so by putting the ultimate price on pleading: death.

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Begging larvae were 13 times more likely than laid-back larvae to be eaten by mom.

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Which may discourage them from asking for more than their fair share of the grub.

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That finding appears in the journal Behavioral Ecology.

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Humans have different standards than beetles do, of course.

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For us, pestering your parents may be a good thing.

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One study suggests crying is a sign of good health, which might lower a baby's chances of being neglected or abused.

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Then again, after those first few years, you're probably better off not being a crybaby.

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

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