Brain basics: understanding sleep, Dreaming and rem sleep. we typically spend more than 2 hours each night dreaming. scientists do not know much about how or why we dream. sigmund freud, who.
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Goodnight. sleep clean. - york times, “sleep is such a dangerous thing to do, when you’re out in the wild,” maiken nedergaard, a danish biologist who has been leading research into sleep.
Brain Basics: Understanding Sleep
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