Want to not only fall asleep quickly but also stay asleep longer? Sleep scientist Matt Walker explains how your room temperature, lighting and other easy-to-fix factors can set the stage for a better night's rest. Sleeping with Science, a TED series, uncovers the facts and secrets behind our nightly slumber. (Made possible with the support of Beautyrest) Check out more: go.ted.com/sleepingwithscience and subscribe to the TED channel: www.youtube.com/TED

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