There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
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Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
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About 2/3 of American men prefer boxers to briefs.
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Americans did not commonly use forks until after the Civil War.
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Babies crawl an average of 200m a day.
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Yawns are more contagious among people with closer relationships.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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