How 13 Became the Internet’s Age of Adulthood

At 13, kids are still more than a decade from having a fully developed prefrontal cortex, the part of the brain involved in decision-making and impulse control. And yet parents and educators unleash them on the internet at that age—if not before—because they’re told children in the U.S. must be at least 13 to download certain apps, create email accounts and sign up for social media.

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