A Fourth Layer of Epicycles on the Standard Cosmology

From Science Daily, reporting on a paper in Physical Review Letters, "Inflatable Dark Matter":

Standard cosmology -- that is, the Big Bang Theory with its early period of exponential growth known as inflation -- is the prevailing scientific model for our universe, in which the entirety of space and time ballooned out from a very hot, very dense point into a homogeneous and ever-expanding vastness. This theory accounts for many of the physical phenomena we observe. But what if that's not all...