Precise cosmological distances have now been computed to roughly 1500 Type Ia Supernovae (SNeIa) over the last 20 years since the discovery of cosmic acceleration. I will discuss recent work to develop a testable model that I claim simultaneously, fully, and directly explains two of the key mysteries that have persisted in our fundamental understanding of SNIa standardization: the intrinsic scatter of SNIa standardized brightnesses and the apparent correlations between residual standardized brightness with host galaxy properties.