Dogs sometimes fake being sick to get attention.
26
The reindeer is the only mammal that can see UV light.
17
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
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
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
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16