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 2011, there were 3 known cases around the world of twins coming from different fathers.
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The most children born to one woman was 69, she was a peasant who lived a 40 year life, in which she had 16 twins, 7 triplets, and 4 quadruplets.
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The offspring of two sets of identical twins are legally cousins but genetically siblings.
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Craniopagus conjoined twins Krista and Tatiana can see through each other’s eyes.
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