Editing Openai/6921ae73-3700-8000-8ab7-90012976bb8a (section)

==== We can actually measure how the universe behaved: ====
* The cosmic microwave background shows the universe was: - Much hotter and denser in the past.
* The way galaxies are distributed and how they move matches a universe that: - Started dense and expanded, with density decreasing over time.

So a universe that “slowly gained density during the Big Bang” doesn’t match:
* The CMB
* Element abundances
* Galaxy formation patterns

It’s like an alternate universe with totally different starting rules.

===== If the universe slowly gained its density during the Big Bang instead of starting super dense: =====
* You’d need matter to constantly appear from nothing or space to contract.
* You’d lose the normal Big Bang picture: no standard CMB, no normal element formation.
* Gravity would ramp up over time, likely causing a collapse, not a nice long-lived, star-filled universe.
* It probably wouldn’t make a universe that can host life like ours.

If you want, we can try another twist:

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