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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Condoms were originally made of animal intestines or linen.
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In 1949, an official boxing match between a bear and a man was held. The bear won.
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Early American humans hunted car-size armadillos and used their shells for houses.
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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