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Global History & Geography for 14-15 Yr olds USA) (Thomas Caswell)
Global History & Geography for 14-15 Yr olds USA) (Thomas Caswell)
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Eratosthenes
(276?-196? BCE), Greek mathematician, astronomer, and geographer who measured the circumference of the Earth. His measurement was only off by 15%.
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Global History & Geography for 14-15 Yr olds USA) (Thomas Caswell)