This is How a Man 2200 Years ago Calculated the Circumference of the Earth With just a Stick - Physics-Astronomy.org

This is How a Man 2200 Years ago Calculated the Circumference of the Earth With just a Stick



In the mid-20th century we began launching satellites into space that would help us determine the exact circumference of the Earth: 40,030 km. But over 2000 years earlier, a man in Ancient Greece came up with nearly the exact same figure using just a stick and his brain.

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