On average a woman has 4 sexual partners in her lifetime.
-143
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Obsessive nose picking is called Rhinotillexomania.
101
Enamel is hardest substance in the human body.
61
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
