To get the full story, start with EPISODE 1
Back to my point.
For animals, the world was never really born as much as it was passed the baton by whatever long forgotten cock-up had preceded it. Which I personally find to be much more realistic.
Now, although there is unity in vision there is also room for diversity, because there are two schools of thought regarding how animals perceive this primordial state. One of them argues that there initially was a pile of steaming manure, while the other purports it was a forever-decaying carcass.