The Vault A Dizzying Clock Chart From the Pre–Time-Zone Era Proves That Time Zones Are Wonderful By Rebecca Onion May 01, 201412:03 PM ...

If you’re looking for a 1-second time reference, you’d probably just grab a GPS module off the shelf and use the 1PPS output. As demonstrated by [InazumaDenki], though, an old quartz cl… ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...