“Flat-earthers”, people who believe that the Earth is flat, have been catching a lot of flack for their ridiculous claims, but their’s is not the craziest theory regarding our planet’s shape and structure. Some people actually believe the Earth is hollow and that a race of superior humans live inside it.
The hollow Earth theory was first proposed in the 17th century by some of the leading scientists of the time. Unlike their predecessors, however, the modern hollow Earth theorists also believe that a race of superior humans, Vikings, and Nazis live in paradise at the center. These residents of the core frequently send UFOs, via holes in the North and South poles, to spy on us surface dwellers in an attempt to prevent a nuclear war.