What happens when we sleep, and why we need just the right amount

Why do adults need 7 to 9 hours of sleep each night and why do kids need more? Experts explain what happens while we sleep – and what doesn't when we cut sleep short.

Karla Whitley (@DietitianInABox) / X

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I NEED THIS TO HAPPEN , metal sonic prime

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American Heart Association News brings you the latest information brain health.