Sharks have been on the planet longer than trees.
14
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
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
Two dogs were among the Titanic survivors.
262
The cat brain weighs about 30g.
167
Sharks, like other fish, have their reproductive organs in their chests.
248
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20