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
The reindeer is the only mammal that can see UV light.
17
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11