There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
Americans did not commonly use forks until after the Civil War.
82
Roughly a quarter of the world's people live in China.
50
Americans will spend more on cat food this year than baby food.
32
In a year, the average person walks four miles to make his or her bed.
56
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
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10