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 a lifetime, an average person walks the equivalent of 5 equators
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People with blue eyes are better able to see in the dark.
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Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
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Babies cry but they don't produce tears until one to three months after birth.
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On average a woman has 4 sexual partners in her lifetime.
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