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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Males sweat 40% more than females.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
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Senegalese women spend an average of 17.5 hours a week just collecting water.
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Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
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On average, men's noses are 10% larger than women's.
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