  The rotation of the mixture begins in a small area, and then spreads out through the mass (B12). As the extent of the mixture is unlimited (or infinite, apeiron), the rotation and expansion will continue forever, bringing more and more ingredients into the whirl (a summary of the process is in Gregory 2007). The force and speed of the rotation is (according to B9) much faster at the edges, where the expanding rotation meets the as-yet-unmoved mass of ingredients: what we perceive of the rotation (probably the motions of the heavens) is much slower than the unobserved rotation. The force is enough to pull apart and rearrange the ingredients: