Millions of people around the world claim to have had an encounter with a creature unlike any recognized by mainstream science - such as the Mothman, Chupacabra, and Mongolian Death Worm. Could these incredible creatures be real? And if so, what could possibly explain these freaks of nature?

Ancient practices such as prayer, blood sports, voodoo, and exorcism are often thought to be relics of bygone superstition - but there is evidence they have an impact on the physical world. Is it possible that the mind and body can use the power of ritual to tap into hidden forces that lie just beyond the grasp of conventional explanation?