Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
On average, there's 100 billion neurons in the human brain.
83
A person can live without food for about a month, but only about a week without water.
156
Poor eyesight (myopia) is associated with higher IQ.
232
By weight, Bone is five times stronger than steel.
417
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82