10 The Insane True Story Of Sleepytime Tea’s Origins In An Extraterrestrial Cult (thoughtcatalog.com) posted 1 year ago by Questionable 1 year ago by Questionable +10 / -0 17 comments share 17 comments share save hide report block hide replies
So two hot air balloons and a laser is all you need to demonstrate this.
I didn't ask for all that nonsense. What I said was:
Just send two up. If the earth is flat, you can show that by having one shine a laser at the other one. This experiment is cheap and repeatable.
If you cannot do that one simple thing, then the world is not flat.