A giraffe sleeps for only 2 hours a day.
If you avoid your sleep for more than 10 days, you will die.
On average, cats sleep 10 to 15 hours a day.
The colder your house is, the worse your dreams are. They say that if your room is at an average temperature, you have better sleeps.
On average, dogs sleep around 10 to 13 hours a day
The word “Nightmare” was used a long time ago for a female spirit who besets people at night while sleeping.
Blind people dream. Their dreams are auditory if they were born blind. If they became blind at an early age, they still dream of what they remember.
Babies don’t dream of themselves until they reach the age of 3
It’s impossible to dream when you’re snoring
Drug withdrawal can cause more intense dreams. People who also quit alcohol and smoking experience heavier dreams and nightmares
90% of the dream is lost the first minute we wake up
Our brains tend to be way more active when we sleep, than when we’re awake.
We roughly spend around 1/3 of our lives sleeping.
Thousands of years ago, the Egyptians were the first to create a dream dictionary in 4000 B.C.E.
Sometimes we dream outside of our REM sleep (Rapid Eye Movement).
Human beings spend roughly around 6 years of their lifetime dreaming
When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
You grow by about 8mm (O.3in) every night when you are asleep, but shrink to your former height the following day.
Tiger shark embroyos fight each other in their mother's womb. The survivor is born.
Bruce Lee was so fast that they actually had to slow a film down so you could see his moves. That's the opposite of the norm.