Eratosthenes - Wikipedia - Deepstash

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Eratosthenes - Wikipedia

en.wikipedia.org

Who has calculated the circumference of the Earth?

The first person to determine the size of Earth was Eratosthenes of Cyrene, who produced a surprisingly good measurement using a simple scheme that combined geometrical calculations with physical observations and without leaving Egypt. 

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Eratosthenes

Eratosthenes of Cyrene was a Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist. 

He was a man of learning, becoming the chief librarian at the Library of Alexandria.

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