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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

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Anyone who's ever had a cat knows how demanding they can be.

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Let me out, let me in, give me food, give me different food.

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The list goes on.

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But how do these clever kitties convince us to do their bidding?

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A study in the July 14 issue of Current Biology suggests it's all in how they ask.

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Karen McComb of the University of Sussex started studying persuasive cat calls after realizing that her own pet used a hybrid between a purr and a cry to get her out of bed in the morning.

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(sound)

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McComb got recordings of other cat calls.

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And back in the lab, she found that people thought purrs made by cats who were trying to solicit a snack were more urgent, and less pleasant, than those made when kitty was, say, relaxing on the sofa.

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(sound)

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Turns out that the "feed me" purr includes a high-frequency component, absent from the contented purr,

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that makes people want to reach for a can opener just to make Fluffy stop.

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It's obviously part of " Fluffy's Master Plan for World Domination."

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Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.

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