Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The most expensive cow in the world was sold in 2009 for $1.2 million.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Two dogs were among the Titanic survivors.
262
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
There's a rare breed of pig that looks like a sheep.
14
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23