Yes; https://www.independent.co.uk/life-style/history/ancient-greeks-proved-earth-round-eratosthenes-alexandria-syene-summer-solstice-a8131376.html https://www.

Yes; https://www.independent.co.uk/life-style/history/ancient-greeks-proved-earth-round-eratosthenes-alexandria-syene-summer-solstice-a8131376.html https://www.independent.co.uk/life-style/history/ancient-gre...