Eratosthenes — "The Earth is a sphere, and its size can be determined."
The Earth is a sphere, and its size can be determined.
The Earth is a sphere, and its size can be determined.
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"Eratosthenes refused to accept the popular understanding of any subject and sought always to find out the truth of a matter for himself."
"The sun casts no shadow in Syene at the summer solstice."
"The Earth is not the center of everything, but it is a significant part of the cosmos."
"There are two ways to measure the Earth: one by walking, the other by thinking."
"One must combine practical observation with theoretical understanding."
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