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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In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
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The world's youngest parents were 8 and 9 and lived in China in 1910.
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The world's tallest man reached 8 feet 11 inches at 21.
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Women rate men more attractive if other women are looking and smiling at him.
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