How Did People in Ancient times Measured the Passing of Time?
The earliest natural events to be recognized were in the heavens, but during the course of the year there were many other events that indica
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Clepsydra
How Did the First Clocks Work?
How Did the First Clocks Work? The earliest known clocks are sundials. In the ruins of Egypt, a giant sundial, almost 100 feet tall, has bee
How Were Water Clocks Used?
How Were Water Clocks Used? A water clock uses a flow of water to measure time. If viscosity is neglected, the physical principle required t