Greetings, I am slightly curious as to whether the LCDM model may require a slight tweaking. The reason I am curious is because I recall reading a while back that removing the homogeneity assumption from our current models could assist in accounting for some of the large-scale structures, and voids that we see in the universe. Have any of you ever discussed these speculations before? The age of the universe is calculated by extrapolating the current rate of expansion backwards, and if the homogeneity assumption fails on some scales, would this mean that some areas of the universe would be older relative to others? Sorry if I'm a little misguided. Thanks in advance.