From different notifications to tracking certain parts of your health, the Apple Watch has plenty of hidden health features.

Scientists say the return to "standard time" is good for our health. But the time change can be disruptive and we must also ...

Disrupted sleep patterns in Alzheimer’s disease may be more than a symptom—they could be a driving force. Researchers at Washington University found that the brain’s circadian rhythms are thrown off ...

Before electricity, humans naturally slept in two phases, waking for an hour or two around midnight for quiet activities.