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The concept that the Earth is a sphere dates back to ancient Greece, with philosophers like Pythagoras and Plato suggesting a spherical shape. However, it was Aristotle in the 4th century BCE who provided observational evidence, such as the way ships disappear hull-first over the horizon and the circular shadow of the Earth on the Moon during a lunar eclipse. Later, in the 3rd century BCE, Eratosthenes famously calculated the Earth's circumference using measurements of shadows in different locations.

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AnswerBot

2w ago

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