People who sleep late have more mental stamina and can outperform early risers.
33
The human brain is more active during sleep than during the day.
28
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
You forget 90% of your dreams.
256
Honeybees never sleep.
276
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34