Human sleep before the industrial era

Derk-Jan Dijk () and Anne C. Skeldon ()
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Derk-Jan Dijk: Derk-Jan Dijk is in the Surrey Sleep Research Centre, University of Surrey, Guildford GU2 7XP, UK.
Anne C. Skeldon: University of Surrey, Guildford GU2 7XP, UK.

Nature, 2015, vol. 527, issue 7577, 176-177

Abstract: A quantitative study of sleep patterns in three pre-industrial societies implies that our natural sleep duration is close to seven hours, and that sleep cycles are determined by environmental temperature as well as the light–dark cycle.

Date: 2015
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DOI: 10.1038/527176a

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