"The key to black holes forming is how gas clouds cool. Most of these clouds cool. Most of these clouds in the early universe contained a high abundance of molecular hydrogen (H), which consists of two hydrogen atom boundp together. Natarajan and Lodato found that such clouds will cool quickly, which causes them to fragment into numerous clumps that each go to form a star."
Astronomy Magazine March 2021 "How to Grow a Giant Black Hole" pp. 16-23
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