A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The strangers in your dreams are actually people that you've seen in real life.
50
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Those who get out of bed by 7am are more likely to be thinner and happier.
20
Cows can sleep standing up, but they can only dream lying down.
745
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
The human brain is more active during sleep than during the day.
28