Although we no longer live in the relative simplicity of the Jurassic age, and even though we are not aware of them, primitive mammalian brain that developed in that era still live on inside our skulls and remain crucial to our daily functions. The challenges we face today in the information age--how to process the vastly greater, more varied and quickly changing inputs we receive--are very different from those that our ancestors faced during the Jurassic age. As we struggle to process overwhelming amounts of information, we may sometimes ask whether our brains can change to help us adapt. In...