As a rule, people perceive near-death visions as a phenomenon that proves the existence of the nether world. Many of those people, who wake up from clinical death, say that they were traveling along a narrow dark tunnel with light shimmering at its end. Some people say that they were communicating with some luminous creature (whom they take for God) and their deceased relatives.

American scientists studied encephalograms of dying patients and discovered that the electric activity in their br...