Sound Waves from the Beginning of Time

The video explores the concept of baryon acoustic oscillations, which are patterns formed by the first sound waves in the universe. These oscillations are crucial for understanding the expansion history of the universe and the nature of dark energy. The video explains the early universe's plasma state, the formation of acoustic waves, and how these waves are imprinted in the cosmic microwave background radiation. It also discusses how modern galaxy patterns confirm the existence of dark energy and its behavior as predicted by Einstein's cosmological constant.

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