Clocks

Since the beginning of civilization, humans have searched for a reliable way to keep track of the time. In the earliest days, months, seasons and years were tracked by careful monitoring of the phases of the moon. Later, the sun and stars were also used to help early people track the passing of time.
The Sumerians used the sundial to divide days into two-hour segments. The Egyptians created a device called Cleopatra’s needle to divide their days into two-hour segments while the ancient Romans devised a way of dividing time into night and day.
A pressing need for more precise measurements led to the invention of the water clock and then the hourglass. These inventions were limited as they relied on water and sand, respectively, to function. The search continued to search for a way of tracking time independent of the seasons or nature.