HowStuffWorks "Are teenage brains really different from adult brains?": "However, with the use of magnetic resonance imaging, or MRI, scientists have been able to look inside the brain, and it seems that changing voices, body hair and awkwardness around the opposite sex are not the only big changes occurring in the teenage years. The brain appears to undergo a growth spurt of its own, and this changing brain may in part explain why teenagers turn into a walking army of emotional loose cannons. On the next page, we'll take a look at just what's going on in the mysterious brain of a teenager."
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