a mind that is still developing. a mind that is still developing. brain a mind that is still developing. brain pre-frontal cortex A teenager’s brain brains pre-frontal cortex pre-frontal cortex Pre-Frontal Cortex Development prefrontal cortex brain http://science.howstuffworks.com... pre-frontal cortex a mind that is still developing. long before their ability to "think twice" prefrontal cortex