There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Termites work 24 hours per day and they do not sleep.
57
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Dieters who sleep more take off more fat that those who sleep less.
159
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
The strangers in your dreams are actually people that you've seen in real life.
50
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