The Goal of the Noon Day Project <http://ciese.org/curriculum/noonday/> is to have students measure the circumference of the earth using a method that was first used by Eratosthenes over 2000 years ago.
Students at various sites around the world will measure shadows cast by a meter stick and compare their results. >From this data students will be able to calculate the circumference of the earth. Click here to get to their site and register.<http://ciese.org/curriculum/noonday/> Watch the Carl Sagan video, <http://youtu.be/0JHEqBLG650> its a treat. Thanks to Ihor Charischak for pointing this out. Stephen
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