Giant Supervoid Behind Cosmic Microwave Background Cold Spot | Universe Mystery Astronomers have identified an enormous supervoid in space, aligned with the Cold Spot in the cosmic microwave background (CMB). Spanning hundreds of millions of light-years, this underdense region contains far fewer galaxies than average. As ancient CMB photons pass through, they lose energy, making the area appear slightly colder from Earth. This unusual Cold Spot challenges standard cosmology and helps scientists