Biphasic sleep patterns.
(How to sleep like your ancestors)

I

n the 90’s Doctor Thomas Weir at the National Institute of Mental Health outside Washington, DC and a team of researchers who, really out of curiosity to discover how prehistoric people slept, conducted an experiment where a group of subjects were plunged into darkness for 14 hours a day and to a nighttime devoid of artificial light. The results were surprising, after three to four weeks, they started sleeping in two phases and having a natural tendency to wake up in the middle of the night for one to two hours before retiring for their second phase of sleep.

So what does it mean? It means we have a natural tendency to want to break our sleep up in to two phases. Sleep one and sleep two.

Biphasic sleep patterns. <br>(How to sleep like your ancestors)</br>

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