An undiscovered population of ancient black holes may be lurking throughout the universe. These bottomless cosmic pits would have a lot in common with more familiar black holes; in some cases, the two may be indistinguishable. But unlike their kin, these undiscovered black holes wouldn’t have formed from a massive star collapsing in on itself, nor would they be peers of the supermassive black holes that feed at the centers of galaxies.
Instead, these black holes would have been born in the earliest epochs after the Big Bang — before stars and galaxies even appeared.
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