An octopus has three hearts.
The official taxonomic classification for llamas is Llama glama.
Giraffes have the same number of vertebrae as humans: 7.
Norway once knighted a penguin.
Rats and mice are ticklish, and even laugh when tickled.
In the state of Arizona, it is illegal for donkeys to sleep in bathtubs.
A group of porcupines is called a prickle.
A cat's nose is ridged with a unique pattern, just like a human fingerprint.
Male pups will intentionally let female pups “win“ when they play-fight so they can get to know them better.
Gentoo penguins propose to their life mates with a pebble.