Over 75 per cent of the population believes in ESP (extra-sensory preception), and a majority in precognition. Reports of apparitions, of telepathy, and other strange phenomena have been rife since antiquity. Science has made such staggering advances in explaining the world around us that paranormal events - those that seem to contradict scientific laws - appear all the more suspect. This book argues that these dismissive attitudes are fundamentally non-scientific. Where evidence for the paranormal exists, scientists have a responsibility to examine and evaluate that evidence. The authors of this book investigate poltergeists, the mystique and the powers of mediums and faith healers, and the effects of sensory deprivation, meditation and hypnosis on paranormal human abilities (psi). They also discuss the most recent findings concerning mind-over-matter experiments, life beyond death and the effects of personality, sex differences and the environment on the way that psi operates.