re: Flat-Earthers: Trolls or Idiots?

quote:

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But you have to be at least a couple hundred thousand feet up for the human eye to see the curve (some eyes could detect it much lower, like 125k)

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I have been up in a 747, and up the Empire State Building, and it seemed clear to me there was a curvature to the horizon. I actually chuckled about flat earthers when I was on the ESB. Guessing from up there (knowing the height of the ESB), you could make measurements proving curvature.