Have you heard the idea that the Earth is flat? No, we are not talking about a theory from thousands of years ago. We are talking about the one circulating today, which seems to be growing in popularity. The Earth is not flat, but some people still cannot comprehend the concept that our planet is round — like a sphere. Read on to learn some of the ludicrous reasons why people insist that the Earth is flat. More importantly, how to prove them wrong (still, after all of these years).