Over 15k replies in this thread, that's what i call a discussion 
"About 489,000,000 results (0.45 seconds)" -- Google
It's really shame that with Google's advanced technology it can't perform the relatively simple task of filtering out the spam sties that populate the first page of results. These spammers promote the false religion of earth curvature and ignore actual science like the physics of water because they're trying to trick you and scam you. Earth curvature can't be observed or measured; it's a faith based belief system.
Still waiting for notbatman to admit he doesn't perform any experiments himself, has no degree in any science and simply believes what the internet or a few youtube videos tell him and he laughs at us because we simply believe the mainstream scientists when he does literally the same, dunning kruger at its best.