we humans were not made to be sedentary. We evolved in a world that required us to explore the environment, to move. Without that stimulation the brain ceases to function at its full potential . . . and can easily go into a tailspin. In his new book, Physical Intelligence: The Science of How the Body and the Mind Guide Each Other Through Life, Scott Grafton, a neuroscientist and practicing neurologist at UC Santa Barbara, proposes that the enormous complexity of the human brain is primarily there to organize movement and action. When we cease to move, to explore our environment, when we no
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