Cows can sleep standing up, but they can only dream lying down.
745
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
34
Only about 2% of the world population has green eyes.
36
The strangers in your dreams are actually people that you've seen in real life.
50
Your thumb is about the same size as your nose.
124