Here's a baby wombat scratching its armored butt

[BlancheSplanchnik]

8. they also poop cubes!

Every evening, your average wombat deposits 80 to 100 dry, cube-like droppings around its territory. This nocturnal marsupial unloads four to eight of these 2-centimeter wide feces every time it pauses to excrete.

This panoply of square droppings isn't just evolution evincing a sense of potty humor. No, the wombats' many odiferous turds help the animal mark its territory and recognize new, potential mates. So yes, wombat's mating process is not unlike some of the most frightening pornography on the internet.

The primarily solitary wombat lives underground in a burrow and possesses awful eyesight. Being nocturnal dwellers, the wombat instead relies on its sense of smell to navigate the forest and shrub. The creatures demarcate their territory by festooning the environs with their feces, a tactic that has yet to catch on in human society. (Among polite company, at least.) Explains Animal Planet of the wombats' scatological geopolitics:

In addition to scent markings, or scents produced by the hormones that animals release, wombats leave their cube-shaped scat as territorial signposts on the tops of rocks and logs. That distinct shape is beneficial since the flat sides of the cubes keep the droppings in place on their precarious locations.
http://io9.com/5872472/the-wombats-cubic-poop-is-one-of-natures-weirdest-superpowers

http://librarianlola.blogspot.com/2011/08/useless-knowledge.html