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
Each year, around 24,000 Americans are bitten by rats!
65
The average single man is one inch shorter than the average married man.
88
As many as one third Americans flush the toilet while they are still on it.
157
One in 500 humans has one blue eye and one brown eye.
145
On average a woman has 4 sexual partners in her lifetime.
-143
In one day an average person will take about 18,000 steps.
55