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spherical Earth: Media
Images
globe
Globe, based on the cartographic work of Guillaume Delisle, made in 1765; in the...
Courtesy of Minnesota Historical Society
Eratosthenes' method of measuring Earth's circumference
By knowing the length of an arc (l) and the size of the corresponding central...
Encyclopædia Britannica, Inc.
Earth's curvature
Earth is so large that people cannot see its curvature unless they are at least 10,668...
NASA
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