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 did not commonly use forks until after the Civil War.
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Approximately one-third of the population can't snap their fingers!
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Up to the age of six or seven months a child can breathe and swallow at the same time. An adult cannot do this.
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The average woman uses her height in lipstick every 5 years.
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The average person walks the equivalent of twice around the world in a lifetime
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