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

By A Mystery Man Writer

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.

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

Karla Whitley (@DietitianInABox) / X

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

Karla Whitley (@DietitianInABox) / X

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

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

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

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

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