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Before electricity, humans slept twice a night; scientists explain why biphasic sleep made perfect sense
Before electricity and endless screen time took over, humans followed a very different rest routine. In the pre-industrial world, people didn’t sleep in one uninterrupted stretch but in two distinct ...
Sciencing on MSN
Did the modern world kill this human sleep habit?
It's a commonly held belief that before artificial lighting, human sleep was 'naturally' divided into two distinct periods, but how true is that?
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