Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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When cats are happy, they may squeeze their eyes shut.
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Rattlesnake mating sessions have been known to last more than 22 hours.
232
The octopus does not have a blind spot.
273
In order to enhance the taste, Japanese macaque wash their food in salt water before they eat. They also make snowballs for fun!
7