Yawns are more contagious among people with closer relationships.
163
There are two credit cards for every person in the United States.
2
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
Nearly 10% of American households dress their pets in Halloween costumes.
36
The Japanese commonly put ketchup on their rice.
16
According to CNN national security correspondent David Ensore, as of 2002 bin Laden had married four women and fathered roughly 25 or 26 children.
54
In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82