I know, I know, I sound crazy. But hear me out. The Earth is hollow and small men live in it. How do we know it's hollow though? Well according to Dr. Smenckle Von Dreckhoffen, the Earth is hollow because he used a form of echolocation. If the Earth wasn't hollow, then the sound waves would hit the core and come back, but they actually hit the other side of the Earth. I also know it is flat because I have been to their city. How did I get down there? Caves of course. The mole men got down there through caves. They all said I'm crazy, but I'm not. Upvote if you agree!!!