This idea that the brain continues to change physiologically throughout our lives, this is yet another idea that sapolski himself had to change his mind about. This is a aspect of my field where i have missed the boat every step in the way. We are nothing more or less than the sum of our biology. Every time you learn something, from something profound to something idiotic, thing changes in your brain. Your brain is constantly re wiring in major ways. And it's made im at all the logical times in response to learning, stimulation, exercise.