Visual Timeline: Eratosthenes

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280 BCE 270 BCE 260 BCE 250 BCE 240 BCE 230 BCE 220 BCE 210 BCE 200 BCE  
 
 
276 BCE - 195 BCE: Life of Eratosthenes, ancient Greek Alexandrian scholar, native of Cyrene and one of the greatest geographers in antiquity.
 
240 BCE: Eratosthenes calculates the earth's cirumference based on the difference in shadows at midday at two different locations in Egypt.
 
 
 
280 BCE 270 BCE 260 BCE 250 BCE 240 BCE 230 BCE 220 BCE 210 BCE 200 BCE