It's a commonly held belief that before artificial lighting, human sleep was 'naturally' divided into two distinct periods, but how true is that?

Ancient humans did not sleep continuously. They commonly slept in two shifts each night, separated by a period of wakefulness ...

Good sleep patterns are vital as the brain flushes toxins while asleep Getty A study found that poor sleep can negatively impact how well the glymphatic system works The system works by collecting ...

In the 1990s, a woman approached sleep neurologist Christopher Jones at the University of Utah with an unusual complaint. She would fall asleep very early in the evening and wake up for the day at 2AM ...

Unhealthy sleep patterns and shorter sleep duration are correlated with increased obesity risk in American adults. Sleep pattern scoring provides a more comprehensive predictive indicator for obesity ...

The familiar labels "night owl" and "early bird," long used in sleep research, don't fully capture the diversity of human internal clocks, a new study has found. The McGill University-led study ...