You share your birthday with at least 9 other million people in the world.
201
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Americans did not commonly use forks until after the Civil War.
82
The world's youngest parents were 8 and 9 and lived in China in 1910.
130
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Yawns are more contagious among people with closer relationships.
163