Erathosthenes

Greek mathematician, geographer and astronomer

[ Born: 276 B.C. / Cyrene, Greece. ]

[ Died: 195 B.C. / Egypt. ]

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• Made a surprisingly accurate measurement for the circumference of the earth using the midday sun and rough distances measured between Alexandria and Syene in Egypt.
• Developed the “Sieve of Erathosthenes”, which was a simple formula to determine all prime numbers, which works accurately up to ~10million.

Trivia - Allegedly, Erathosthenes was nicknamed “Beta” as he could prove himself to be second-best in almost every field.

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