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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Americans will spend more on cat food this year than baby food.
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Males sweat 40% more than females.
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All babies are color blind when they are born.
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Half of all Americans over the age of 55 have no teeth.
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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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Babies cry but they don't produce tears until one to three months after birth.
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