Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cats sleep for 70% of their lives.
8
Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
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Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Condoms were originally made of animal intestines or linen.
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