Learn English: Our Ancestors Slept in Two Parts Each Night (hard)

1 day, 10 hours ago

Our Ancestors Slept in Two Parts Each Night

Long ago, people often slept in two separate periods each night.

A break in the middle allowed for quiet activities or chores.

Modern life, especially artificial lights, changed this sleeping pattern.

Understanding this helps explain why we sometimes wake unexpectedly.

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Source

Original: ScienceAlert

Tags

#sleep history #circadian rhythm #human behavior #sleep patterns #artificial light

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