One of the poster children for neuroplasticity are the London taxi drivers, and studies show that as taxi drivers learn to navigate the streets and memorize the routes, the hippocampus ?" the part of the brain that does spatial navigation ?" gets larger. That seemed to be saying, "Okay, if you use it, it will get stronger. It's like a muscle." But that was the one thing I tried that was a definite no-go. I spent weeks and weeks trying to improve my navigational skills using wearable technologies and afterward, I got put into a brain scanner and they did an fMRI while I was pretending to navigate.