HUMANS used to sleep twice every night and only recently quit the habit, a scientist says. These days, we expect a continuous eight-hour block of rest – but it wasn’t always so. An expert ...

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

In a matchup drenched in familiarity, tactics mattered more than power. Defending champion Coco Gauff walked into her WTA Finals opener armed with momentum and confidence (especially after tasting ...

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 ...

Challenging games can be frustrating, but when they're this fun to play, that frustration turns into motivation for one more attempt at success.

The human body is packed with natural rhythms, from your sleep-wake cycle to the steady pulsing of blood through the brain to heart rate and pulse.

New research shows that living in sync with your body clock may help reduce risks for heart disease, diabetes, and high blood pressure.

If you were able to visualize the passage of time, it may appear as looping ribbons of color, these fragments ribboning and ...

Researchers at the University of California San Diego have discovered that the gut's rhythmic muscle movements could help explain how blood vessels in the brain expand and contract together.