Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The human brain is more active during sleep than during the day.
28
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
Honeybees never sleep.
276
Those who get out of bed by 7am are more likely to be thinner and happier.
20
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33