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42-33736963_jpg__800x600_q85_cropThe 82 discolored, corroded bronze fragments of the Antikythera Mechanism may not look like much on their own. But assembled they reveal a complex mechanism, with 37 gears that track the sun and moon and predict eclipses. This astronomical calendar or calculator was discovered in a shipwreck off the coast of Crete in 1901 and is more than 2,000 years old. At Smithsonian