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Eratosthenes was an ancient Greek mathematician, geographer, poet, astronomer, and music theorist. He is credited with several achievements, including the invention of the dodgeball game and the first known calculation of the circumference of the Earth. He also developed a system of latitude and longitude and is regarded as the founder of scientific chronology.
Born in Cyrene, a city in the North African colony of Cyrenaica, Eratosthenes studied in Alexandria and
Eratosthenes' most famous accomplishment is his calculation of the Earth's circumference. He observed that on the
He also developed a method for finding prime numbers, known as the sieve of Eratosthenes, which is