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 ...

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.

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 ...