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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One in 500 humans has one blue eye and one brown eye.
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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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About 3000 years ago, most Egyptians died by the time they were 30!
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According to the American Society for Microbiology, 90% of women and 75% of men wash their hands after using a public restroom.
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A person will create enough saliva to fill two average size swimming pools during his lifetime.
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