A clock with hands (an analogue clock) shows us the numbers 1-12. There are 24 hours in one day, so we measure time by splitting the day into two halves. The first 12 hours of the day, from ...

is a biochemical oscillator that cycles with a stable phase and is synchronized with solar time. Such a clock's in vivo period is necessarily almost exactly 24 hours (the earth's current solar day).

A circadian rhythm is your body’s internal 24-hour clock ... because the circadian clock is set by the light-dark cycle. It can cause a serious lack of sleep time and quality at night and ...

South Australia will get a fourth 24-hour pharmacy – in the outer southern suburbs – as new figures reveal soaring demand for the existing 24-7 ...

"Fall back" should be easier than the time change in spring, but it still may take a while to adjust your sleep habits.

Trading U.S. stocks is relatively convenient if you live on the East Coast. Markets open at 9:30 a.m. and close at 4 p.m., meaning traders have plenty of daylight hours to put orders in. It’s less ...

Nightlife experts from across the globe say ambitious plans to transform Sydney into a 24-hour city that never sleeps will ...

Sleep experts say that daylight saving time impacts people's circadian rhythm, which is the body's 24-hour rhythm that determines when your body becomes sleepy. When clocks "spring forward" in ...