Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Denmark has twice as many pigs as there are people.
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
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The ancestor of all domestic cats is the African Wild Cat which still exists today.
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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Mosquitoes don't just bite you, they also pee on you.
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