Hack a Day’s very own [Jack Buffington] is throwing his hat into the ring for the Buildlounge laser cutter giveaway with his solar clock that isn’t a sundial. The theory behind [Jack]’s ...

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.

So why do shadows matter? Well, before clocks were invented, the ancient Egyptians used sundials to tell the time with shadows – three and a half thousand years ago! We may have technology to ...

To build a clock, scientists need to count a phenomenon that happens in a regular rhythm. That could be the Earth’s rotation as measured by the shadow on a sundial, the swing of a grandfather ...

Few remnants of the ancient world have survived due to their decorative charm alone, yet sundials continue to reign supreme ...