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Do you really need 8 hours of sleep?

TED Business

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Sleep Is a Mystery

Sleep is a mystery. It's all so easy to worry about because it's so important. When we can't sleep, we feel awful and are desperate for help. But lately our fascination with sleep has gone too far. And if you're already struggling with sleep, it's hard to get clear guidance on what will really help. In this episode, we're getting to the bottom of sleep, from circadian rhythms to puritan witches in your brain.

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