Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
The reindeer is the only mammal that can see UV light.
17
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
12