Children's sense of smell is better than adults'.
860
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
If you're over 100 years old, there's an 80% chance you're a woman.
143
Roughly a quarter of the world's people live in China.
50
Every three seconds, a new baby is born.
122
City dwellers have longer, thicker, denser nose hairs than country folks do.
48