Hierarchical clustering states that structures we see in the universe today (galaxies, galaxy groups or clusters, and large-scale structure) were formed by the collapse of slightly denser regions in the very early universe and grow with time as they draw in more mass from the space surrounding them. We can look at the early universe by observing the cosmic microwave background (CMB), which is the leftover heat from the Big Bang, as seen at the moment when the universe first became transparent (light could pass through it). Considering that the temperature of a gas is related to its density, what would the hierarchical merging model predict the CMB to look like