In April, German biology researchers released a study that set forth an eyebrow-raising proposition: Might men who exercise have more intelligent children?

The study, which was published in the peer-reviewed journal Cell, examined genetically identical mice who were raised in sedentary lifestyles. Once they reached adulthood, half from the original group were moved to cages full of equipment to encourage them to be physically active. (Apparently, mice like going to the gym.) The other half remained sedentary. After 10 weeks, scientists found that the physically active mice performed better on cognitive tests than the inactive ones.

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