Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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
Jumping fleas can accelerate 50 times faster than the space shuttle.
218