Search results
Results from the WOW.Com Content Network
This pattern was common in preindustrial societies, and it was most common to sleep early ("first sleep"), wake around midnight, and return to bed later ("second sleep"). [10] Along with a nap in the day, it has been argued that this is the natural pattern of human sleep in long winter nights.
Bimodal sleep in humans was more common before the Industrial Revolution. [36] Different characteristic sleep patterns, such as the familiarly so-called "early bird" and "night owl", are called chronotypes. Genetics and sex have some influence on chronotype, but so do habits. Chronotype is also liable to change over the course of a person's ...
Sleep epigenetics is the field of how epigenetics (heritable characteristics that do not involve changes in DNA sequence) affects sleep. Research in the field of epigenetics has proven the significance of various environmental experiences.
After an average of three to five hours of sleep, the subjects would awaken and spend an hour or two in quiet wakefulness before a second three- to five-hour sleep period. It was thus suggested that such a biphasic pattern of sleep is the natural or pre-historic tendency for humans.
Matthew Walker, the director of the Center for Human Sleep Science at the University of California, Berkeley, told Fresh Air’s Terry Gross that “catching up” on sleep over the weekend is a ...
The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [1]
New research shows that Homo sapiens traveled from Africa to East Asia and toward Australia up to 86,000 years ago.
The cave where the ancient human remains were found is located beneath a castle in Ranis, Germany. - Martin Schutt/picture alliance/Getty Images. A broader study on Neanderthal ancestry, ...