There is plenty of evidence about how important sunlight is to our circadian rhythm, and how the blue light we stare at on computers and televisions interrupts it. Many people have poor sleep, due to ...

As anticipation builds for the longer days that follow this weekend's switch to daylight savings time, the moment seemed ...

Nuclear clocks are a technology researchers have been working toward for decades. New research in theoretical physics brings them closer to reality.

The graveyard shift is aptly named. People who work at night have an elevated risk of health problems including heart attacks, type 2 diabetes and depression. So greatly increased is their chance of ...