One of the obvious reasons that human beings’ destiny after they shuffle off this mortal coil is such an enduring mystery is that nobody ever comes back to tell us what really happens. Or do they? This is a question that has been the subject of intense speculation, particularly among people who focus on paranormal phenomena. Referred to frequently as “near-death experiences,” (NDEs) people do sometimes undergo what most doctors would refer to as “death,” including a complete cessation of brainwave activity, but are then “brought back to life.” And some of them claim to have memories of that period...