Quantum clocks, in particular, have pushed the boundaries by using the strange rules of quantum mechanics to achieve mind-boggling accuracy. However, there has always been a catch: the more precise ...

But time has another side to it, one that the clocks don't show. "A lot of us grow up being fed this idea of time as absolute," says Chanda Prescod-Weinstein, a theoretical physicist at the ...

Cosmic clocks show that time passed more slowly in the ancient universe. Artist's concept of the universe's most distant quasar. ESO/M. Kornmesser. View 1 Image 1 / 1.

Biological clocks are why cats are most active at dawn and dusk, and why flowers bloom at certain times of day. Circadian rhythms are also essential to health and well-being.

The confusion caused to passersby, as each side of the tower displays a different time, has renewed criticism of the decision to dismantle the eight-decade-old clock tower in 2022.

Chicago engineer Jose Cardona says the idea for a clock wasn’t his alone, he was just the first to build one. Four years later, they can’t make them fast enough.

Doctors say the bigger problem is the clock change in the spring — going from standard time to daylight saving time. On March 9, 2025, clocks will “spring forward” an hour, ending the ...