The head of a jellyfish is called the "Bell."
6
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
The reindeer is the only mammal that can see UV light.
17
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
There's a rare breed of pig that looks like a sheep.
14
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19