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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Babies cry but they don't produce tears until one to three months after birth.
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A person will create enough saliva to fill two average size swimming pools during his lifetime.
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Boys who have unusual first names are more likely to have mental problems than boys with conventional names. Girls don't seem to have this problem.
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The name "Wendy" was made up for the book Peter Pan!
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More than half the population of Kenya is under the age of 15.
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The average person laughs 13 times a day!
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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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