Rain barrels that refill themselves. Psychic horses. Mind-reading Cold War spies. For many, these phenomena are evidence of an unseen world just beyond the grasp of our five senses. For a group of scientists at Duke University, such mysteries demanded further investigation. From 1930 to 1980, under the leadership of Dr. J. B. Rhine, often considered the Einstein of the paranormal, the scientists at the Duke Parapsychology Lab attempted to test the bizarre, the frightening, and the unexplainable against the rigors of science.In Unbelievable, Stacy Horn reveals the strange, lost history of these first attempts to prove—or disprove—the existence of the paranormal, bringing to light a half-century's worth of ghost stories, poltergeists, and paranormal activity. The Duke scientists were queried by the likes of Albert Einstein, Richard Nixon, Aldous Huxley, Carl Jung, and Helen Keller; the U.S. Army and blue-chip corporations such as IBM and Zenith seized upon their findings.Investigating telepathy, clairvoyance, ghosts, poltergeists, and the myriad other strange phenomena that people claim to have experienced, the scientists did find proof that the human mind can exhibit telepathic powers—but their discovery would put them at odds with both the scientific community and the community of believers at large, beginning a multidecade battle among unyielding critics, die-hard believers, and scientists themselves. Yet Horn reveals that between the power of belief and the promise of scientific investigation, there is room for everyone to acknowledge that the truth is out there.