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How Ancient Greek Mathematician Eratosthenes Calculated the Earth’s Circumference (video)

An interesting Business Insider video illustrates how ancient Greek mathematician Eratosthenes calculated the Earth's circumference, over 2,000 years ago. Using a stick, Eratosthenes calculated that...

Students in Greece Set Out to Recreate Eratosthenes’ Experiment to Recalculate Earth’s Circumference

Students from Greek schools will participate in a science project which will recalculate the earth’s circumference, repeating the experiment of the famous Greek mathematician,...