Comments by "Kasumi Rina" (@KasumiRINA) on "Destroying Flat Earth Without Using Science - Part 1: The Moon" video.
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@Areg SARKISYAN the circumference was counted by Eratosthenes, by measuring shadows in Alexandria and Syene (Aswan), Egypt. You know, in Africa. Not Greece. In 3rd century BC, which makes it ~2300 years. Greeks, though, knew it was round way before that, but first globe was built by... Crates of Mallus, in Cilicia, modern Turkey. But Earth being a sphere was mentioned by Greek and Persian astronomers before, so people in at least three continents knew that in BC era.
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