Today is Sunday the fifth day of October in 2014 A.D.
Have a quick rehearsal of evolution.
As protozoa evolve into bacteria, and the amoeba does its exercises, and perhaps fungi and early photosynthetic plants, but all in the water. They meet dry land and adapt. Amoeba move, plants do not. Consider from the axes of symmetry available to the perception of an organism at the single cell or rudimentary multicell level. Those organisms don't even really think in terms of XYZ coordinate systems, more they adapt according to reactions occuring at the cell surface and the competing progressions of biochemical pathways. Plants have a problem. They do not move. Life, outside of the primordial type floating around in the water, develops espousal. Trees espouse birds. Where exactly do the birds come from, like griffons? Well, that's not really to say because it's so long ago and so far away. Trees espouse birds, like griffons. Birds have bird brains and lay eggs. They do not kernel up within themselves like a tree does with the fruit of its branch. Your spouse does what you cannot; the griffons are basically useless except that they move, which the trees do not. Big chickens. When the trees espouse a bird good enough to self-kernel, with a brain advanced enough to self-kernel, then you have a bird man, with wings off his butt and flying with his head close to the ground and feet forward. If the bird man exercises on it enough then maybe he unkernels, and then you have a bird woman. She puts out gumbies, less than half the size of a finger, baby got lost in the bathwater, the braille system on keyboards is training to not miss this particular bundle arrangement again while pressing the leaves and old paper in the bathwater.
In this world...
This world is a terrarium. Large enough that it makes little difference while on the sandy surface. Refer to my books.
The terrarium began packed to the dome with phaeries, bugs, big chickens, and a few bird men. Bird men grew in population, began regimenting the land, became stupid. Began drinking in the grape juice pits (grapes practically ferment themselves) and practicing various tricks of magic and escapism branding and killing each other in known good ways around the firepit and then make grand reappearances when they healed. Bird men building boxes and advancing technology learned the deliberate methods for wrapping the baby up in the bathwater, and that interfaced with the idiots killing each other around the firepits. Stupid as the whole situation was, they did not immediately die out. There were many long spans of time before the bird men were stupid enough to each other as a whole society that they all fell past the point where they would no longer recover from their tricks and jokes and games and injuries, at that point the ones with experience in mummification began determining exactly at what point the brain could no longer be mummified and the whole resurrected. In the course of all that time there had been many studies into the exact workings of the brain and the exact placement of boogers and other blocking materials and agents. Seahorses were also common by that time. The humans had indeed practiced with boiling each other and many of each other down, cutting them up, sewing them together, figuring out what works and what doesn't.
And, back then, they knew what real dogs were, they knew what polymorph sewing combinations were popular and worked and what the resulting lifespans and characterisms of such beasts were.
That was all long before they even had the chainsaw and could keep up with the vegetation to cut it down to the sandy surface.
The final result is: terrarium, hell down below, heaven and the steam press for new babies on top of that, the carnival on the terraces on top to age the meat and ship it to hell in a contractual sort of agreement.