The Unexplained: Mysteries of Mind, Space, & Time was a popular partwork magazine published by Orbis Publishing in the United Kingdom, between 1980 and 1983. It ran to 156 issues, with issue 157 being an index to the collection, and dealt with the paranormal and mysteries such as UFOs, the Bermuda Triangle, ghosts, spontaneous human combustion, the Cottingley Fairies, ancient knowledge, sea monsters, the Yeti, weird coincidences, stone circles, contact with the dead, and notable historical characters linked to the occult. The magazine was published as a journal, with page numbering continuing from one edition to the next. When the magazine ceased publication, a refund was offered if the consumer returned the covers.