Yawns are more contagious among people with closer relationships.
163
Males sweat 40% more than females.
104
Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
11
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
People with blue eyes are better able to see in the dark.
153
On average, men's noses are 10% larger than women's.
12
Forty percent of Americans have never visited a dentist.
33
