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00:00Ever wondered why you spend a third of your life sleeping?
00:03What really happens when you close your eyes?
00:05Your brain doesn't shut down, it's actually working harder.
00:09During sleep, your brain cleans out toxins, stores memories, and repairs your body.
00:14In dreams, scientists believe they help process emotions and problem-solve,
00:19like your brain's overnight therapy session.
00:22Lack of sleep doesn't just make you tired.
00:25It weakens your immune system, harms memory, and even shortens your lifespan.