Is sleeping too much bad for your brain?

The largest sleep study ever conducted concludes that both sleeping too little and too much negatively impacts cognitive ability, regardless of age.

Why our thoughts turn negative before we go to bed - ABC Everyday

Does Too Much Sleep Have Negative Repercussions?

The Detrimental Effects of Too Much Sleep

Is sleeping too much bad for your brain?

Why does too much sleep cause brain damage? - Quora

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The Surprising Risks of Sleeping Too Much

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How Does Lack of Sleep Affect Mental Health?

Sleeping too much is bad for your brain, world's largest sleep