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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A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
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76% of Americans celebrate New Year's Eve in groups of less than 20.
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95% of people feel uncomfortable when the TV volume is an odd number.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
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The most dangerous job in the United States is that of an Alaskan Crab Fisherman.
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In a year, the average person walks four miles to make his or her bed.
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