Cats recognise the voice of their owner, but never evolved to care.
22
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
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250