When you shave a guinea pig it looks like a little hippo.
19
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
Ants tend to survive in a microwave because they find the coolest spot and wait!
17
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9