It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
As many as one third Americans flush the toilet while they are still on it.
157
Over 50% of lottery players go back to work after winning the jackpot.
71
According to CNN national security correspondent David Ensore, as of 2002 bin Laden had married four women and fathered roughly 25 or 26 children.
54
Just one in three consumers pays off his or her credit card bill every month.
27
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
Roughly a quarter of the world's people live in China.
50