Roughly a quarter of the world's people live in China.
50
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Up to the age of six or seven months a child can breathe and swallow at the same time. An adult cannot do this.
165
If you're over 100 years old, there's an 80% chance you're a woman.
143
The leading cause of poisoning for children under the age of six in the home is liquid dish soap.
42
As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
687