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
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
When dragonflies mate, their tails form a love heart.
22
Gorillas can catch human colds and other illnesses.
205
Sharks, like other fish, have their reproductive organs in their chests.
248
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45