It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Two in five people in the world marry their first love.
270
Nearly 10% of American households dress their pets in Halloween costumes.
36
Americans did not commonly use forks until after the Civil War.
82
The most recorded orgasms in an hour were 134 for one woman and only 16 for a man.
192
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7