Lack of water is the #1 trigger of daytime fatigue.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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The higher someone’s I.Q. the more likely they are to be sleep deprived.
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The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
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