Why We Sleep
·http://www.ted.com/talks/
Russell Foster studies sleep. In fact, he's a circadian neuroscientist, which means he studies what happens to the brain when it does - and doesn't - sleep. This entertaining talk, just under twenty-two minutes in length, covers a range of sleep-related topics from the amount of sleep people typically got before the invention of the lightbulb (hint: a lot more than we get now) to dangers of depriving teenagers of their bed rest. Along the way, Foster asks and tries to answer, the age-old question of why we sleep and explores the relationship of interrupted sleep cycles with mental illness. Subtitles for the talk are available in 36 languages
posted by Chuck Schallhorn
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