"Dysania" is the state of finding it hard getting up out of bed in the morning.
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47% of people have a nightmare at least once a month.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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The average cat sleeps about 2/3 of the day.
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Dieters who sleep more take off more fat that those who sleep less.
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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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The strangers in your dreams are actually people that you've seen in real life.
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44% of kids watch television before they go to sleep.
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