This is Eratosthenes:
This is Eratosthenes theory:
Source: https://www.astro.umd.edu/~richard/ASTRO340/eratosthenes.pdf
This is a still-frame from a video recorded aboard an airplane:
This is a comparison of a flat and motionless Earth vs. Eratosthenes theory (the globe):
...
This is Eratosthenes theory:
Source: https://www.astro.umd.edu/~richard/ASTRO340/eratosthenes.pdf
This is a still-frame from a video recorded aboard an airplane:
This is a comparison of a flat and motionless Earth vs. Eratosthenes theory (the globe):
...