The Cosmic Afterglow

The video explores the cosmic microwave background (CMB), a remnant from the early universe. It explains how the CMB originated shortly after the Big Bang when the universe was a hot, dense sea of particles. As the universe expanded and cooled, the first light emerged, which we now detect as the CMB. The video recounts the accidental discovery of the CMB by Arno Penzias and Bob Wilson in 1964, who found persistent static while working on a radio communication project. This static was later identified as the CMB, providing evidence for the Big Bang Theory. The CMB's tiny fluctuations in density helped form the universe's structure, seeding stars and galaxies. The video concludes by emphasizing the CMB's role in understanding the universe's evolution.

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