This mysterious ancient computer has a ‘calendar ring’ that followed the lunar year

Fresh research about ripples in the fabric of spacetime suggests a nearly 2,000-year-old cosmic calculator followed the lunar calendar instead of the solar one.

The hand-powered “Antikythera mechanism” was retrieved in pieces from a sunken shipwreck in the Aegean sea in 1901, sparking more than a century of research into how this device was made — and why. The box-shaped mechanical computer used gears and dials to track ancient astronomical events such as solar eclipses and the movements of planets.

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