The majority of the world's population is religious or believes in supernatural phenomena. In the United States, nine out of every ten adults believe in God, and a recent Gallup poll found that about three out of four Americans believe in some form of telepathy, déjà vu, ghosts, or past lives. Where does such supernatural thinking come from? Are we indoctrinated by our parents, churches, and media, or do such beliefs originate somewhere else? In...