A 2000 year-old Greek computer accurately tracked the  NOV 30 2006

A 2000 year-old Greek computer accurately tracked the motion of the sun, the irregular orbit of the moon, and predicted lunar eclipses. "Remarkably, scans showed the device uses a differential gear, which was previously believed to have been invented in the 16th century. The level of miniaturisation and complexity of its parts is comparable to that of 18th century clocks."

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