Russell Foster: Why Do We Sleep?

  • Published22 Sep 2015
  • Reviewed22 Sep 2015
  • Author Russell Foster
  • Source TED

What do we know about sleep? Not a lot, it turns out, for something we do with one-third of our lives. In this talk, Russell Foster shares three popular theories about why we sleep, busts some myths about how much sleep we need at different ages — and hints at some bold new uses of sleep as a predictor of mental health.

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TED