How The Universe Works: Cosmic Rays

Cosmic microwave background radiation (CMB) is one of the most important and fascinating discoveries in the field of cosmology. It provides valuable insights into the origins and evolution of our universe. The CMB is essentially a faint radiation that fills the entire observable universe, and it serves as a remnant of the early stages of the universe's existence. The story of the CMB begins approximately 13.8 billion years ago during the Big Bang, the event that marked the birth of our universe.