Part 2/11:
The cold spot in the CMB is an intriguing anomaly that has sparked considerable debate within the scientific community. While our understanding of the CMB itself is robust and firmly rooted in the Big Bang Theory, the specifics surrounding the cold spot remain contentious. It stands out as a region about 70 microkelvin colder than the average CMB temperature, which is around 2.7 kelvin. The fact that it is also significantly larger than typical cold spots—about 5 degrees across—has raised eyebrows and prompted careful scrutiny.