Eratosthenes and the Earth's Circumference

Abstract

Around 240 BCE, Eratosthenes used the sun’s rays and some clever geometry to indirectly measure the Earth’s circumference. In this video we explain how that measurement was done.

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MIT K12 Outreach
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Vinay Ramasesh
PhD candidate in Physics

My research interests include ultracold atoms, superconducting quantum bits, and machine learning.