The True Story Behind SAFETY NOT GUARANTEED’s Time Travel Ad
The author of the infamous ad speaks out.
The author of the infamous ad speaks out.
In 2000 John Titor, a self-proclaimed time traveler from 2036, began telling his story online. Some people thought he was real, most people thought he was a nut. HOW TO BUILD A TIME MACHINE looks at Titor's story and the nature and meaning of time travel - and it needs your help to be completed!