How Eratosthenes calculated the Earth's circumference

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Carl Sagan explains how Eratosthenes calculated circumference of the Earth

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How did Eratosthenes calculate the circumference of the Earth?

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How the Ancient Greeks Proved that the Earth was Round

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Eratosthenes: First Person to Find the Length Around Earth part 1

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Eratosthenes - Measuring the Circumference of Earth

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Eratosthenes: Biography of a Great Thinker

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Eratosthenes: First Person to Find the Length Around Earth part 2

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#1 Eratosthenes

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The First Scientific Proof of Round Earth! 🥇🌍 #shorts

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Measuring Earth's circumference with a stick (in 245 BC)

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GEOGRAPHY L3 Eratosthenes, first person to calculate the circumference of the Earth

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The Amazing Eratosthenes

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How to Measure the Earth's Circumference

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ERATOSTHENES

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How Eratosthenes Proved Our Round Earth 2,200 Years Ago ?

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Test Your Knowledge: How Well Do You Know Eratosthenes? 🌍

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He proved earth is round 2200 years ago( Eratosthenes of Cyrene) #mathematics #earth #historyfacts

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What is Eratosthenes Famous For | The Ultimate Why

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