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The Antikythera mechanism ( /ˌæntɨkɨˈθɪərə/ ant-i-ki-theer-ə or /ˌæntɨˈkɪθərə/ ant-i-kith-ə-rə) is an ancient mechanical computer[1][2] designed to calculate astronomical positions. It was recovered in 1900–1901 from the Antikythera wreck.[3] Its significance and complexity were not understood until decades later. Its time of construction is now estimated between 150 and 100 BC.[4] Technological artifacts of similar complexity and workmanship did not reappear until the 14th century, when mechanical astronomical clocks were built in Europe.[
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