Sleep no more los angeles1/6/2024 In the absence of data, some researchers thought our ancestors slept from dusk until dawn and, hence, got 2 to 3 more hours of sleep on average daily than people in industrialized nations. With the invention of electric light bulbs in the 1870s, followed by the development of television, the Internet, and other high tech devices, researchers have argued that the duration of sleep has been shortened from the "natural" levels evolved in our hunter-gatherer ancestors. Siegel has studied sleep in humans and other mammals for 40 years. The striking uniformity in the sleep duration and habits of three far-flung groups in Bolivia, Tanzania, and South Africa busts several myths about how much sleep our ancestors got-and what is optimum for modern humans, says Jerome Siegel, senior author of the study and a neuroscientist at the University of California (UC), Los Angeles. Yet, these adults are healthy and don't feel sleep-deprived, according to a report today in Current Biology. Now, a new study of sleep patterns in hunter-gatherer adults in Africa and South America has found they get no more sleep than people living in industrialized nations- an average of just 6.9 to 8.5 hours every night. That lament has been heard ever since Thomas Edison invented electricity and lit up the night, but it seems to have taken on new urgency in recent years as experts warn us about cellphones, laptops, and e-readers impairing our sleep. No one gets enough sleep in the modern world.
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