No one knows for sure what happens to us after death. But Dr. Jim Tucker is trying to find out. Tucker is medical director of the Child and Family Psychiatric Clinic at the University of Virginia. He also works at the university's Division of Perceptual Studies, which scientifically investigates paranormal phenomena such as near-death experiences, ghosts and reincarnation. His book "Life Before Life: A Scientific Investigation of Children's Memories of Previous Lives" (St. Martin's Press, 2005) tries to verify statements from children who claim to have had past-life experiences. The work continues the research of Dr. Ian Stevenson, who began...