Afternoon naps are refreshing — but could they be messing up our sleep cycles? Sleep scientist Matt Walker reveals the pros and cons of napping, plus tips on how to get the most out of your next short snooze.

Sleep — we spend one-third of our lives doing it, but what exactly do we get out of it? And how can we do it better? In this TED series, sleep scientist Matt Walker uncovers the facts and secrets behind our nightly slumber. Check out more episodes on TED.com: https://go.ted.com/sleepingwithscience

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