Stone Tape
The Stone Tape theory is the speculation that ghosts and hauntings are analogous to tape recordings, and that mental impressions during emotional or traumatic events can be projected in the form of energy, "recorded" onto rocks and other items and "replayed" under certain conditions. The idea draws inspiration and shares similarities with views of 19th-century intellectualists and psychic researchers, such as Charles Babbage, Eleonor Sidgwick and Edmund Gurney. Contemporarily, the concept was popularized by a 1972 Christmas ghost story called "The Stone Tape", produced by the BBC. Following the play's popularity, the idea and the term "stone tape" were retrospectively and inaccurately attributed to the British archaeologist turned parapsychologist T. C. Lethbridge, who believed that ghosts were not spirits of the deceased, but were simply non-interactive recordings similar to a movie.