Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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Denmark has twice as many pigs as there are people.
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Dogs have been man's pet for over 14,000 years.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
There's a rare breed of pig that looks like a sheep.
14
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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