Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
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47% of people have a nightmare at least once a month.
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The average person falls asleep in seven minutes.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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"Dysania" is the state of finding it hard getting up out of bed in the morning.
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People who sleep late have more mental stamina and can outperform early risers.
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The average cat sleeps about 2/3 of the day.
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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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