True. The Cosmic Microwave Background (CMB) is a uniform microwave radiation that permeates all of space. It is considered a remnant of the Big Bang and is one of the strongest pieces of evidence supporting the Big Bang theory. The fact that the CMB has a uniform temperature of about 2.7 Kelvin across the entire observable universe is consistent with the idea that it originated from a hot, dense, and uniform state during the early stages of the universe, as predicted by the Big Bang theory.
