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How The Greeks Knew That The Earth Was Round 2,500 Years Ago

It wasn’t until the mid-20th century that we managed to launch satellites into space and determine the exact kilometers of the circumference of the...

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,...

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