Instead of thinking that the world is flat, they are convinced that it actually contains a paradise at its core that resembles the Garden of Eden.

The ‘hollow-Earthers’ even believe UFOs are sent from the globe’s interior by ‘guardians of the planet’ to spy on the human race and avert a potential nuclear war.

Author Rodney Cluff is spearheading the bizarre movement which he claims has thousands of followers after a boom in numbers.