Only 2% of the Earth's population are natural redheads.
13
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
More boys than girls are born during the day; more girls are born at night.
120
Intelligent men tend to be more sexually faithful.
31
Babies that are breastfed are more likely to be slimmer as adults than those that are not breastfed.
110
Yawns are more contagious among people with closer relationships.
163
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
46