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Science
Why do humans have to sleep?
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We sleep because it is critical for our health and well-being. We sleep so the brain can reorganize itself. We sleep in order to restore and rejuvenate, to grow muscle, repair tissue, and synthesize hormones.
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Sleep is important for two main reasons. It helps us repair and restore our organ systems (including our muscles, immune systems, and various other hormones) and it plays a crucial role in memory.
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