Thousands of people have had near-death experiences, but scientists have argued that they are impossible. Dr. Eben Alexander was one of those scientists. A highly trained neurosurgeon, Alexander knew that NDEs feel real, but are simply fantasies produced by brains under extreme stress. Then, Dr. Alexander's own bran was attacked by a rare illness. The part of the brain that controls thought and emotion--and in essence makes us human--shut down completely....