Changes

*[http://www.sterlinghousepublisher.com/newsite/content/process/showbook.php?book_id=58 The Sum of Existence], by A.R. Barnes, Jr. - contains an account of how Eratosthenes estimated the [[circumference of the Earth]].

*[http://www.lawrencehallofscience.org/pass/passv10/flat-earth.html Flattening the Earth] Sep-Oct 2002, Mercury Magazine, pp. 34-38. by Jeffrey Burton Russell

==References==

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[[Category: Theories]]