Unformatted text preview: 360 degrees of a circle (360 divided by 7.2 gives you 50), Eratosthenes then multiplied the distance between Alexandria and Syene by 50 to determine the circumference. Eratosthenes was able to determine the circumference to be 25,000 miles, which is just 100 miles more than the actual circumference at the equator. A few decades later, the Greek geographer Posidonius thought Eratosthenes' circumference was too large. He calculated the circumference on his own and obtained 18,000 miles, 7,000 miles too short. During the middle ages, most scholars accepted Eratosthenes' circumference. In old age, Eratosthenes became blind and died of starvation around 192 or 196 B.C. and lived to be about 80 to 84 years old....
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 Spring '07
 Santamaria
 Equator, Antarctic Circle

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