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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Cats recognise the voice of their owner, but never evolved to care.
22
Moths are unable to fly during an earthquake.
328
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
The oldest recorded elephant lived for 82 years.
213