More than half the population of Kenya is under the age of 15.
71
People with blue eyes are better able to see in the dark.
153
Two in five people in the world marry their first love.
270
During an average lifetime, a man will spend 3,350 hours removing 8.4 meters of stubble.
52
Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
76
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11