This is proof that the World is round not flat. My son did this in school as a science project and as you can clearly see not only the Earth is round but the other things are too hence proof. I'm sure if he had said "Teacher I read on the internet the other day that some strange people think the world is flat how is that possible?" his teacher would of replied with "Larry ignore those guys they are either paranoid schizophrenics, smoke too much weed or are retards".