Description
A Greek mathematician, Eratosthenes (276 BC-194 BC) used an experiment to enable him to prove the sphericity of the Earth and to measure its circumference. He used sun and shadows for his calculations! Let's watch what has he done.
A Greek mathematician, Eratosthenes (276 BC-194 BC) used an experiment to enable him to prove the sphericity of the Earth and to measure its circumference. He used sun and shadows for his calculations! Let's watch what has he done.
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