How much sleep do you really need? | Sleeping with Science, a TED series TED 2:55 3 years ago 621 325 Скачать Далее
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How many hours of sleep do you need? Mount Sinai Health System 1:19 7 years ago 739 310 Скачать Далее
How many hours of sleep a night do I need? Columbia University Irving Medical Center 0:41 11 years ago 80 916 Скачать Далее
Ask Dr. Park: How Much Sleep Should an Adult Get Each Night? Montefiore Health System 0:52 12 years ago 7 381 Скачать Далее
How Much Sleep Do We Need? University of California Television (UCTV) 2:23 5 years ago 21 638 Скачать Далее
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Real Questions - Is getting too much sleep bad for you? UCLA Health 0:45 13 years ago 72 137 Скачать Далее
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