Noticing
Your brain is always being shaped by something, and if you're not deliberately shaping it, something else already is. That's neurology. The same plasticity that shows up as a larger hippocampus in London cab drivers responds to demand in either direction. When the demand changes, the brain changes with it. I met a version of this in person on a recent trip to New York, an Uber driver who told me he'd had to learn thousands of streets, avenues and boulevards to pass his own licensing exam. You must score an 80 or you fail. He's probably working with a larger hippo too. The organ doesn't consult you before it remodels. It just measures repetition. Whatever you repeat, you become. Whatever you neglect, you lose, usually with little fanfare. Norwegian conscription data shows IQ scores reversing since about 1975, reversing even between brothers raised in the same house, which strongly points away from genetics and toward environmental causes. MIT's study of 126,000...