In 1969, some Beatles fans began to suspect that Paul McCartney had died, and his death was being covered up. Their evidence? Eerie “messages” like “turn me on, dead man” encoded in the new song “Revolution 9” that could only be heard if you played the audio in reverse. Although those claims have been debunked, you can still find plenty of YouTube videos of Beatles music played backward — and if you listen, you can hear the messages, plain as day. How can that possibly be a hoax? It comes down to your brain’s intense love of language.