"Lamda-Cold Dark Matter (ACDM for short) the universe originated 13.8 billion years ago in the Big Bang. The early universe was initially a nearly featureless cauldron of subatomic particles and dark matter (which outweighs familiar atomic matter by nearly 6 to 1), with material almost evenly distributed and thus unable to clump together into intesting structures."
Astronomy Magazine March 2021 "How to Grow a Giant Black Hole" p. 19
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