Doctors approach near-death experiences very much like my father approached physics, and they have come up with prosaic explanations for just about everything. Tunnels, bright lights, life reviews, Godheads, out-of-body experiences, feelings of peace and unity, cosmic insight, and a disinterest in the corporeal world can all be induced in people fairly easily—and happen all the time. You don’t need to believe in an afterlife to explain the visions of a hypoxic brain or the out-of-body illusions of someone suffering a seizure. With one central exception: the dead.
