I've proven it with simple math multiple timesFlat earthers are full of shyt.
It's about to be 2020. If they wanted to prove the earth was flat, the could've pooled money together to either buy a seat on space shuttle, or build something that goes high enough to record the earth.
But I don't think the really want to knowI think they just want to feel like they are apart of something special.
Let's bet money that I can stump you with 1 simple question about the "sidereal day"