Greetings! I posted this in the wrong section last time. Since I saw similar post in this section I hope I have it right this time.


I am currently in debate with a group of people who swear the Earth is flat. Yes there are many people that believe this. My question to you pilots, being the foremost authority on such a subject is this. How many of you have witnessed an undeniable curvature in the Earth while flying, and at what altitude were you? I would really appreciate any input. I know its hard to take seriously but you will be helping a lot of people who are very confused. Thanks!