The ancestor of all domestic cats is the African Wild Cat which still exists today.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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Cows can sleep standing up, but they can only dream lying down.
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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.
2
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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