The scientific story behind the timeline of our Universe

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The scientific story behind the timeline of our Universe

Today, it’s now 13.8 billion years since the Big Bang occurred. Our observable Universe extends for 46.1 billion light-years in all directions, and is made of: 68% dark energy, 27% dark matter, 4.9% normal (atom-based) matter, 0.09% neutrinos, and 0.01% radiation, with no hint of other components like spatial curvature, cosmic strings, domain walls, or any other weird stuff we can imagine. If we were to run the clock backward, however, we’d fi…