Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Sloths take two weeks to digest their food.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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A cat can jump FIVE TIMES as high as it is tall!
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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