Not 8, only 6 hours enough for sleep
Tanzania’s Hadzabe tribe has taken part in a new study that disapproved popular belief that a normal human being needed at least eight hours to sleep, researchers have reported.
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Why do we sleep?
New research is giving scientists an insight into why we sleep and what happens when we do it
By Pallab GhoshScience correspondent, BBC News. Science & Environment
Sleep is a normal, indeed essential part of our lives. But if you think about it, it is such an odd thing to do.
At the end of each day we become unconscious and paralysed. Sleep made our ancestors vulnerable to attack from wild animals. So the potential risks of this process, which is universal among mammals...
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PARENTING: Children with TVs in their bedrooms get less sleep