the changing of form in front of witnesses; the puzzling question of telepathic communication; that in close encounters of the third kind, the creatures seem to be at home in Earth's gravity and atmosphere; the sudden stillness in the presence of the craft; levitation of cars or people; and the development by some of psychic abilities after an encounter. "Do we have two aspects of one phenomenon or two different sets of phenomena?" Hynek asked. Finally, he introduced a third hypothesis. "I hold it entirely possible", he said, "that a technology exists, which encompasses both the physical and the psychic, the material and the mental. There are stars that are millions of years older than the sun. There may be a civilization that is millions of years more advanced than man's. We have gone from Kitty Hawk to the moon in some seventy years, but it's possible that a million-year-old civilization may know something that we don't ... I hypothesize an 'M&M' technology encompassing the mental and material realms. The psychic realms, so mysterious to us today, may be an ordinary part of an advanced technology." In Hynek and Vallee's 1975 book The Edge of Reality, Hynek published a stereoscopic photograph of a UFO he took during a flight. According to the book, the object stayed in sight long enough for Hynek to unpack his camera from his luggage and take two exposures. UFO researcher Robert Sheaffer writes in his book Psychic Vibrations that Hynek seemed to have forgotten the photographs when he later told a reporter for The Globe and Mail that he had never seen a UFO. The article states that in all the years he had been looking upward, Hynek "has never seen 'what I would so dearly love to see. Oh, the subject has been so ridiculed that I would never report a UFO even if I did see one—not without a witness'". Close encounter In his first book, Hynek published the "Close Encounter" scale that he had developed to better catalog UFO reports. Hynek was later a consultant to Columbia Pictures and Steven Spielberg for the popular 1977 UFO movie Close Encounters of the Third Kind, named after a level of Hynek's scale. He made a cameo appearance in the film. At the end of the film, after the aliens disembark from the "mother ship", he can be seen, bearded and with pipe in mouth,