Paranormal phenomena consist of psychokinesis or PK (effects of mind on matter), and three types of extrasensory perception or ESP – telepathy (mind-to-mind communication), clairvoyance (acquisition of information from a distant object or event), and precognition (seeing into the future). They are inexplicable on any generally accepted scientific theory, and their existence, if proven, would overthrow fundamental principles of physics — Dr Susan Blackmore