Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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There's a rare breed of pig that looks like a sheep.
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Sharks, like other fish, have their reproductive organs in their chests.
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A domestic cat can sprint at about 31 miles per hour.
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Squirrels forget where they hide about half of their nuts.
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