One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Lack of water is the #1 trigger of daytime fatigue.
148
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
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
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The human brain is more active during sleep than during the day.
28