The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Bats sleep 18-20 hours per day.
5
The average cat sleeps about 2/3 of the day.
203
Those who get out of bed by 7am are more likely to be thinner and happier.
20