eratosthenes : Definition, Usages, News and More

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  • n  Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the Moon and sun (276-194 BC)
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  • How the Circumference of Earth Was Accurately Estimated 2000 Years Ago
    Born around 276 B.C. in Cyrene, Libya, Eratosthenes soon became one of the most famous mathematicians of his time. He is best known for making the first recorded measurement of the Earth's circumference, which was also remarkably accurate. (And, yes, people at that point had known for some time that the world wasn't flat, contrary to popular belief .) Read more...        
    Jan. 2, 2014 - Gizmodo

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