Russell Foster: Why Do We Sleep?

Did you know that one-third of our lives is dedicated to sleep? But what is it about sleep that is that important to us? This short TEDTalk will change the way you look at sleep!

Russell Foster is a circadian neuroscientist: He studies the sleep cycles of the brain. And he asks: 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, 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.

Last Checked/Updated: August 12, 2019.
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