Most people smile when they are frustrated, according to a study.
15
You can only remember 4 things at a time.
31
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Women mature much faster than men.
1k
You will experience the billionth second of your life when you are 31 years old.
21
People in parts of Western China put salt in their tea instead of sugar.
16
Children's sense of smell is better than adults'.
860