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

Daylight saving time begins at 2 a.m. on Sunday, March 9, at which time clocks 'spring forward' and reset to 3 a.m. In the spring, clocks spring forward one hour. You will have lost an hour when you ...

I have a complicated relationship with sleep. When we’re in the honeymoon stage, I get eight to 10 hours of sleep without ...

Here's what to know about daylight saving time and when to change the clocks. In the spring, clocks spring forward one hour. You will have lost an hour when you awake that morning. In the fall ...

Here's what to know about daylight saving time and when to change the clocks. In the spring, clocks spring forward one hour. You will have lost an hour when you awake that morning. In the fall ...

In an optical atomic clock, atoms are irradiated with laser light. If the laser has exactly the right frequency, the atoms ...

At that time, clocks will jump ahead one hour from 2 a.m. to 3 a.m. “In the United States, this has the effect of creating more sunlit hours in the evening during months when the weather is the ...

In March, millions of Americans will turn their clocks forward, marking the start of daylight saving time in 2025. The controversial practice of "springing forward" and "falling back" has been ...