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How Smartphones Hurt Sleep
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How Smartphones Hurt Sleep

The Atlantic - Olga Khazan

Blue light makes the brain think it's time to wake up, just as you're getting ready for bed. The answer to the question "How'd you sleep?" has, for most of human history, been "not too well." Even before the advent of electric light, people slept two or three to a bed, next to a chamber pot, and …

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