How an Ancient Greek Calculated the Earth’s Circumference

Here's how you can calculate the circumference of the earth with just a stick.
Earth Photo by NASA

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All the way back in 240BC, a Greek mathematician named Eratosthenes calculated the Earth’s circumference using nothing but a stick in the ground. How did he do it? Check out the video below from Business Insider for the answer.

You can see more from Business Insider on their YouTube channel.

Sharif Jameel is a business owner, IT professional, runner, & musician. His professional certifications include CASP, Sec+, Net+, MCSA, & ITIL and others. He's also the guitar player for the Baltimore-based cover band, Liquifaction.

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