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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The octopus does not have a blind spot.
273
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
There's a rare breed of pig that looks like a sheep.
14