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
Sharks, like other fish, have their reproductive organs in their chests.
248
The elephant brain weighs about 6,000g.
274
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
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
A 42-foot sperm whale has about 7 tons of oil in it.
209