There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
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
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
If you hold farts in during the day, they'll just come out when you sleep.
16
Termites work 24 hours per day and they do not sleep.
57