Credit: Physikalisch-Technische Bundesanstalt In an optical atomic clock, atoms are irradiated by laser light. If the laser has the correct frequency, the atoms change their quantum-mechanical state.

Timekeeping has always been fundamental to human civilization. From ancient sundials to mechanical clocks and modern atomic optical timekeepers, each innovation has brought greater precision. Now, a ...

After two years of study, he was required to complete an 8-year apprenticeship before becoming a master clock maker. Carter moved here around 20 years ago from Maryland. Carter said he works on all ...

and has made a name for himself with an impressive portfolio of electromechanical clocks. His latest work, called the Time Slider, is every bit as captivating as his previous work. The mechanical ...

Winter is winding down as the sun is setting later each day, but nothing says spring like the day we spring the clocks forward. Under the current daylight saving period, most Americans will lose ...

This is where waking up with a so-called sunrise alarm clock — which mimics sunrise through the gradual brightening of a light — can help your body wake up more naturally, experts say.