Most people smile when they are frustrated, according to a study.
15
Half of all Americans over the age of 55 have no teeth.
39
The Japanese commonly put ketchup on their rice.
16
About 2/3 of American men prefer boxers to briefs.
83
Muhammad is the most common name in the world.
96
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119