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 what if you have to answer one question before they let you into space to look at the earth?

Q. is the earth flat?

answer wrong and you dont get to go. what is your answer? 
 It's not flat; I can test this assertion by measuring shadows at various locations on Earth. Some YouTubers have even sent rockets with eggs into space, and you can see the curvature. 
 heres your ticket, enjoy the show 🧾