CNN Top News - How our ancestors used to sleep can help the sleep-deprived today

2022.01.10 00:05

How our ancestors used to sleep can help the sleep-deprived today

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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.

원문출처 : https://www.cnn.com/2022/01/09/health/sleep-history-wellness-scn/index.html

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