There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
The average person falls asleep in seven minutes.
115
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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In 75% of American households, women manage the money and pay the bills.
97
Yawns are more contagious among people with closer relationships.
163
Half of all Americans over the age of 55 have no teeth.
39