Global Health

Do we really need eight hours of uninterrupted sleep a night?

A man sleeps during the Midburn festival at southern Israel May 22, 2015. The Israeli version of Nevada's Burning Man festival, concluded on Sunday in the country's southern Negev desert. In keeping with the Burning Man tradition, thousands of revellers set up camp in the desert for 5 days of art, dance and music, burning their exhibits on the last two nights of the festival. Picture taken May 22, 2015. REUTERS/Amir Cohen  FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

Humans can sleep on very different schedules, with little difference in wakeful competence. Image: REUTERS/Amir Cohen

Leon Lack
Professor of Psychology, Flinders University
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