Roughly a quarter of the world's people live in China.
50
Two in five people in the world marry their first love.
270
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
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
35% of the people using personal ads for dating are already married!
23
You can only remember 4 things at a time.
31