Darn you internet.

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Lisaerien on July 12nd, 2018 at 00:12 UTC »

Not with obelisks, but wood sticks, and a camel !

More about eratosthenes (english subs available) https://www.youtube.com/watch?v=dZyeKmytFeA

jaktyp on July 12nd, 2018 at 01:36 UTC »

He was off by only 10% because he made assumptions that threw the numbers off. When they retried the same experiment with all the facts in 2012, the numbers they got back were only .15% off the currently accepted polar circumference.

Terran_Jedi on July 12nd, 2018 at 03:15 UTC »

Eratosthenes was a Greek that lived in 200BC, not 3700BC. That would be 1000 years before the great pyramids were completed.