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Explore the evolution of the Universe's temperature through this 46-minute scientific lecture that investigates how hot gas has changed over cosmic time. Learn about groundbreaking observational findings showing a tenfold increase in mean gas temperature across 8 billion years, reaching approximately 2 million Kelvin in the present day. Discover the fundamental connection between gravitational potential energy of collapsed halos and baryon thermal energy, understanding how matter density fluctuations lead to gravitational collapse and shock-heating of baryonic matter. Delve into the quantitative verification of cosmic shock-heating mechanisms and their role in shaping the thermal history of our Universe.
