How Eratosthenes measured the Earth's circumference using only a shadow
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How Eratosthenes measured the Earth's circumference using only a shadow
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Learn about Eratosthenes, the famous scholar who measured the Earth's circumference. No, he didn't have are really long tape measure. All he had to do was use a shadow cast by the mid-day sun.
Finally, an ASMR podcast for Smart People! Relax, meditate even. Let the whispered sounds of knowledge seep into your mind.
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