This time, they used thorium tetrafluoride (ThF₄ ... It’s another step closer to a practical, real-world nuclear clock. Even ...

U.S. lawmakers held their first hearing Thursday in more than three years on a long-running debate to end the practice of ...

Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...

The custom made a comeback in World War II ... to take the proposal forward," it said. "As the clock is ticking, we will take our time to assess the situation." - It's about time - For Kelly ...

One of the world's largest clocks sits atop a former soap factory in Clarksville, Indiana. The Colgate clock, with a 40-foot diameter, has been telling time since 1924. High atop a former soap ...

Whether we lock the clock on standard time year-round or daylight saving ... It returned in 1942 during World War II but was vastly more chaotic than it is today. Seasonal clock changes were ...

It returned in 1942 during World War II but was ... targeting the changing of the clocks have generally split between locking them on permanent standard time or daylight saving time.