Method to measure Earth missed by ancient Greeks?

Fabio Falchi
I describe a simple method to calculate Earth dimensions using only local measurements and observations. I used modern technology (a digital photo camera and Google Earth) but the exact same method can be used without any aid, with naked eye observations and distances measured by walking, and so it was perfectly accessible to Ancient Greek science.
Read more at https://arxiv.org/abs/2007.02111

Click to access 2007.02111.pdf

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