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
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
The reindeer is the only mammal that can see UV light.
17
Only 3% of bird species have penises.
0
Sharks have been on the planet longer than trees.
14