One Sunset - Multiple Flat Earth Fails. - [9.19] https://www.youtube.com/watch?v=gB1punBbeV8 Flat Earth debunked again by an observation you would never see on a Flat Earth. [2.47] https://www.youtube.com/watch?v=UpuqMUTT_Cs Advanced Earth Curvature Calculator http://walter.bislins.ch/bloge/index.asp?page=Advanced+Earth+Curvature+Calculator