There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Those who get out of bed by 7am are more likely to be thinner and happier.
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Lack of water is the #1 trigger of daytime fatigue.
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47% of people have a nightmare at least once a month.
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Honeybees never sleep.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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