The ancients knew the Earth is round; the case of Eratosthenes and the first documented measurement of the Earth’s circumference

Eratosthenes was a Greek born in Cyrene in modern-day Libya. As a mathematician, poet, athlete, geographer, astronomer, and music theorist, his vast knowledge made him an ideal fit for the post of librarian at the Museum (Library) of Alexandria. Continue reading “The ancients knew the Earth is round; the case of Eratosthenes and the first documented measurement of the Earth’s circumference”

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