The Wall Street Journal: It starts when people try something different—Pepsi instead of Coca-Cola, a blue tie instead of the old red one—and find that something good happens. Soon, without realizing it, someone who wouldn’t think twice about, say, walking under a ladder or traveling on Friday the 13th begins More

The New York Times: Superstitious people do all sorts of puzzling things. But it’s not just the superstitious who knock on wood. From time to time, we all rap our knuckles on a nearby table if we happen to let fate-tempting words slip out. “The cancer is in remission, knock More