Archaeologists working in Peru have discovered 25 well-preserved quipus, an ancient string-based device used to solve mathematical problems and to assist in record-keeping. The find was made in ...

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 ...