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Sleep

The average adult spends more than 220,000 hours - or roughly 25 years - in bed sleeping. That's one third of your life spent in slumber!1 But what exactly is sleep - and why do we spend so much time doing it? In what could be our most ambitious Brain Games experiment ever, we keep 3 volunteers awake for 36 hours in order to answer just that.

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  • Originally Aired June 28, 2015
  • Runtime 25 minutes
  • Content Rating United States of America TV-PG
  • Network National Geographic
  • Created February 1, 2016 by
    Administrator admin
  • Modified January 16, 2022 by
    tomitos01poland