The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Obsessive nose picking is called Rhinotillexomania.
101
You forget 90% of your dreams.
256
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Mushrooms are more closely related to humans than they are to plants.
47
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82