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 octopus does not have a blind spot.
273
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Tigers can see 6 times better at night than humans.
305