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.

Scientists developed a highly accurate optical ion clock, improving time measurement precision by 1,000 times.

Use an online calculator or a dedicated sundial app to get the correct angles for your location. Selecting the ideal location ...

people mainly used sundials. To differentiate, they started saying “of the clock” to specify the time by a clock. So next time you check the time, you’ll know that “o’clock” is a ...

Today, while digital technology has largely replaced mechanical systems, the legacy of those early sundials and mechanical clocks endures the test of time.