A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Sloths take two weeks to digest their food.
243
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
Sheep, goats, octopuses, and toads have rectangular pupils.
7
A cow produces around 200,000 glasses of milk in her lifetime.
373
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Penguins have a gland above their eye that turns saltwater into freshwater.
12