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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If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
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Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
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Rio de Janeiro was once capital of Portugal, making it the only European capital outside of Europe.
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There is a town in Pennsylvania named Intercourse.
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
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There is a tiger named Kenny who is the only known tiger to have downs syndrome.
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