Intelligent men tend to be more sexually faithful.
31
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
Yawns are more contagious among people with closer relationships.
163
Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
76
Forty percent of Americans have never visited a dentist.
33
In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82
On average, men's noses are 10% larger than women's.
12