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Many people assume that "beauty sleep" is a myth used to convince children to go to sleep. But a new study suggests there may be something to it.
The study looked at the effect that sleep deprivation has on the way other people perceive your attractiveness. Study participants were asked to sit for photographs. The photos were identical, except for one thing -- some of the participants had had a full night's sleep the night before, while others had been awake for 31 hours straight.