The length of a second was initially determined astronomically, using Earth's rotation. One second was defined as 1/86,400th ...

Nuclear clocks could be more accurate than atomic clocks by a factor of about 10, potentially leading to improved GPS ...

FOR THE discerning timekeeper, only an atomic clock will do. Whereas the best quartz timepieces will lose a millisecond every ...

The most precise clocks in the world will lose only one second every 300 billion years—and someday they might fit in your ...

There are clocks without hands, shadows detached from the people to whom they belong – the intense heat of the atomic bomb left only dark shadows where people or objects had been – and snow ...

After researching and testing various grandfather clocks, we have identified the top options for those looking for the best combination of style, functionality, and durability. We have researched ...

Tired of squinting at your phone, even though it's one of the best? A tablet might be the perfect solution. But with a dizzying array of options available, finding the right one can be tough.

It's that time of the year again. It's not just fall, it's also when we "fall back" and set our clocks back by one hour to mark the end of daylight saving time. The first Sunday of November marks ...

Here's when daylight saving time ends, why clocks fall back, the Sunshine Protection Act and more. Taylor Swift and daylight saving time:'I only see daylight' -- DST ends hours after second ...

Here’s how it works. Helping folks find the best TVs for their living spaces is one of the best parts of my day as Tom's Guide's Managing Editor for TVs and AV. I take great pride in the rigor ...