https://www.sciencealert.com/research-challenges-ultramassive-black-hole-formation
Astronomers Just Found Some of The Most Massive Black Holes Discovered in Our Universe :...
Mar 3, 2023 - A study on dozens of galaxies within several billion light years of our own has revealed black holes that far exceed our expectations on just how big these...
most massive black holes
https://www.space.com/10558-universe-massive-black-holes-huge-early.html
Universe's Most Massive Black Holes Got Huge Early | Space
Dec 29, 2010 - The first rapid growth spurt of the universe's most massive black holes occurred much earlier than astronomers previously thought, and are still growing fast,...
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