There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
There are approximately three chickens for every human on Earth.
13
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Female kangaroos have three vaginas.
2
Two dogs were among the Titanic survivors.
262
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The seahorse is the only fish to have a neck.
12