Inside the Teenage Brain: A Work in Progress  If you’ve ever looked at a teenager and wondered, "What were they thinking?" science finally has a more nuanced answer than "hormones."Recent neurobiological research shows that the adolescent brain isn’t just a smaller version of an adult brain; it is a highly specialized, rapidly remodeling organ. It is a period of "high-speed" construction where the brain's emotional centers are fully online, but the "brakes"—the rational con