It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The Japanese, on average, are the shortest people.
320
Only 2% of the worlds population is blonde.
15
Two in five people in the world marry their first love.
270
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191