What does a Doctor have to say about life after death? And what evidence convinced him to believe that the evidence for the afterlife is remarkably strong? Dr. Jeffrey Long is a researcher into the phenomenon of near-death experiences (NDEs). A physician by training, Dr. Long practices radiation oncology at a hospital in Kentucky. He is the author of Evidence of the Afterlife: The Science of Near-Death Experiences, which appeared on The New York Times Best Seller list.