The average single man is one inch shorter than the average married man.
88
There are two credit cards for every person in the United States.
2
Babies cry but they don't produce tears until one to three months after birth.
238
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
One in 500 humans has one blue eye and one brown eye.
145
Most people smile when they are frustrated, according to a study.
15
People in parts of Western China put salt in their tea instead of sugar.
16