There are about 1,400 different species of bacteria in your belly button.
10
The average sperm cell swims at 8 inches per hour.
76
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
You see your nose at all times, your brain just chooses to ignore it.
30
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
In 1996, research found that having excessive body hair is linked to higher intelligence.
23