The Basenji dog is the only dog that is not able to bark.
4
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
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
Sloths take two weeks to digest their food.
243
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27