Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The elephant brain weighs about 6,000g.
274
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
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
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Lobsters have blue blood.
476