Calculating the epicyclic theory of the moon with epicyclic pin-and-slot gears in this subtle and indirect way was an extraordinary conception by the ancient ... pin-and-slot devices, similar ...

From the abacus to the IBM personal computer, calculating devices have come a long way. Let’s take a look through the history of these machines and the remarkable progress that came with the ...

Astrolabes were astronomical calculating devices that did everything from ... a researcher at New York University and an expert in ancient astronomy. “For every fancy one, there were probably ...

The Olympics were also of paramount importance to ancient Greeks, who labeled years in relation to ongoing Olympiads and suspended wars for the games' duration. Perhaps the mechanism was used to ...