Based on this era, we know the universe is roughly 68% Dark Energy, 27% Dark Matter, and only 5% "stuff" (atoms, stars, us).
Start with the moment of "last scattering." Before 380,000 years, the universe was a hot, opaque plasma soup. Then, it cooled enough for atoms to form, the fog lifted, and light finally escaped. This is the CMB —the oldest "picture" we have. Precision cosmology : the first half million years
This sounds like a deep dive into the and the Cosmic Microwave Background (CMB) . Since the first 500,000 years set the stage for everything we see today, a great feature would focus on how we use that ancient light to "weigh" the universe. Title Idea: The Universe’s First Snapshot Based on this era, we know the universe
How 380,000 years of chaos became the blueprint for the cosmos. The Core Narrative This is the CMB —the oldest "picture" we have