Add Yahoo as a preferred source to see more of our stories on Google. A painting of a woman waking up. The wild thing about Ekirch’s study was that the evidence of biphasic sleep was staring us in the ...

On dry nights, the San hunter-gatherers of Namibia often sleep under the stars. They have no electric lights or new Netflix releases keeping them awake. Yet when they rise in the morning, they haven’t ...

For centuries, people commonly practiced segmented sleep, waking for an hour or more between two distinct sleep phases. This biphasic pattern, influenced by natural darkness, shifted with the advent ...

A new study analyzed the sleep patterns of jellyfish and sea anemones and found they share some sleep traits with humans. The research could provide insight into the origins and function of sleep.