Does not getting enough sleep lead to Alzheimer's disease? Sleep scientist Matt Walker explains the relationship between the two -- and how researchers are exploring how to use sleep to decrease our chances of developing this condition. 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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