During a class in college, we talked about a subject that caught my attention - the fact that the brain can grow and change in physical structure. This fact was found by imaging the brains of London cab drivers. These drivers are required to memorize every street of London before they can become a driver. They study for four years before they take the test. Their brains were imaged before studying, during studying, and after taking the test. It was found that their hippocampu