It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
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The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Condoms were originally made of animal intestines or linen.
347
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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