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

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.

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Parameters Sleep Review

I NEED THIS TO HAPPEN , metal sonic prime

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

Insomnia Raises Heart Attack Risk by 69%

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

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

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