THERE IS A STUDY THAT CLAIMS the teenage brain develops at the rate of a baby’s brain—which is to say, the fastest rate it will ever grow. The difference the second time around is that you are both physically mobile and mentally more aware. You know that something is happening within you but not within your control. This is your new body, you’re told, but don’t touch it. Don’t use it yet. It’s dangerous. It’s not finished cooking.

