Astronomers Find Hidden Trove of Primordial Black Holes in Dwarf Galaxies
"Black holes this large can’t easily grow from the black holes that form when ordinary individual stars die”
Black holes previously hiding in plain sight have been discovered by researchers at the University of North Carolina at Chapel Hill, who have found a treasure trove of massive black holes in dwarf galaxies.
Maybe dwarf galaxies are what's left after black holes swallowed most of what were once giant galaxies.