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

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A hand-powered calculator from 2,000 years ago, known as the Antikythera mechanism, had a calendar ring that likely followed the lunar year.

This mysterious ancient computer has a 'calendar ring' that followed the lunar year : Read more

 

[DeOrbit]

Want to make your own? Check these guys out (no affiliation on my part)

https://www.stgeotronics.com/open-antikythera