Fear is a big, dumb mutt of a word. It’s what you feel when a bus barrels at you head on, when a wonky email lands in your inbox, when your kid says he’ll be home by nine and it’s nearly 11. But fear is useful. It springs you from the path of that bus, lifts your hand from the keys, fires up your detective skills to track down your kid. But fear, in all its incarnations—dread, apprehension, anxiety, unease, even awe—can do more than save you from buses; it can also make you smarter, more adept in your surroundings, […]