Most people smile when they are frustrated, according to a study.
15
Intelligent men tend to be more sexually faithful.
31
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Muhammad is the most common name in the world.
96
The first man to swim the length of Great Britain grew a beard to stop jellyfish stinging his face.
16
Intelligent people have more zinc and copper in their hair.
233
According to Harris Interactive, 70% of men and 57% of women shower daily.
75
There are two credit cards for every person in the United States.
2