Legend has it that and engineer working in his father’s barbershop led him to discover not only the first working clock ... For example, a sundial can tell time, but only if the sun is shining.

For example, a sundial can tell time ... It was named after the Greek water clock because, prior to a 1959 earthquake, it erupted every three minutes. This kind of clock has been around for ...

Julien Coyne invented a digital sundial. Sundials usually cast a line or triangle to indicate the hour. This one is designed so that when light passes through, it displays the shapes of numbers.

During the Punic Wars, the Romans took a sundial from the island colony ... but another kind of clock! Clepsydras, or water clocks, tracked the passage of time by regulating the flow of water ...