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 been found. Scientists believe...
Read MoreHow Did the First Clocks Work? The earliest known clocks are sundials. In the ruins of Egypt, a giant sundial, almost 100 feet tall, has been found. Scientists believe...
Read MoreHow Does a Sundial Tell Time? Long before we had clocks, people used sundials to tell time. A sundial tells time by measuring the angle of a shadow cast by the sun. A...
Read MoreHow Does the Radio Antenna Work? The radio antenna on a car or on your home set is like an ear, listening for radio waves sent out by broadcasting stations. The radio...
Read More