Eratosthenes (l. c. 276-195 BCE) was a Greek astronomer, geographer,
mathematician, and poet best known for being the first to calculate the circumference of the earth and its axial tilt.
Read more about this remarkable man here.
There's a lot of good - and bad things you can say about San Fran. I've been there a couple of times, back when it wasn't so dan...
Greeks, of course. Including Diogenes who invented the middle finger salute
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