Spell It: People used to 'double sleep' at night. So, why have we stopped?
We learn about bi-phasal sleep, which was a worldwide phenomenon until the industrial era
Source: gulfnews.com
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We learn about bi-phasal sleep, which was a worldwide phenomenon until the industrial era
Like many people, historian A. Roger Ekirch thought that sleep was a biological constant -- that eight hours of rest a night never really varied over time and place.
Research shows just how much a "sleep is for wimps" attitude and the Industrial Revolution changed how we r...
Like many people, historian A. Roger Ekirch thought that sleep was a biological constant -- that eight hours of rest a night never really varied over time and place.