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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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Schools are well-known reservoirs of contagion where students share all sorts of communicable conditions: coughs, colds, flu, you name it.

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But germs aren't the only things kids can catch from their friends.

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If they're lucky, they could come down with a 4.0.

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Because a new study shows that high-schoolers whose friends get higher marks tend to raise their own grade point averages over time.

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The findings are in the journal PLOS One.

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That our social circles influence us is not news.

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For example, studies have shown that the fatter your friends, the more likely you're also overweight.

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In the grade point study, researchers took to the classroom to see whether academic achievement might be as contagious as obesity.

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They asked 158 eleventh-graders to go down a class roster and point out their pals.

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Then they checked everyone's report cards at the time of the survey, and again a year later.

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The researchers found that those students whose friends were outshining them academically tended to improve their grades over the year.

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Whereas those who were hanging out with academic underachievers let their grades slide.

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So, go ahead. Befriend a brainiac.

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You might just learn something.

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

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