Sleep deprivation
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Sleeping in space a big challenge for astronauts
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Sleepless in space: NASA finds astronauts need pills to snooze
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The Margaret Thatcher gene: Why some people need less sleep
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Sleep-deprived? You may start forming false memories
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Sleepless nights associated with significant weight gain, study claims
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Sleeping a great way to bolster the memory, the more the better
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Insomnia ups risk of stroke eight times in young adults
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