There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Cows can sleep standing up, but they can only dream lying down.
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Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
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Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
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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.
15
The strangers in your dreams are actually people that you've seen in real life.
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A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6