There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
The strangers in your dreams are actually people that you've seen in real life.
50
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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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.
57
Bats sleep 18-20 hours per day.
5
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6