These ancient quasars shouldn't exist so soon after the Big Bang

Scientists have discovered 31 of the oldest known quasars, including the two earliest ever found, dating back to when the universe was just 670 million years old. These quasars, powered by supermassive black holes, are perplexing because they should not have formed so soon after the Big Bang, according to current theories. This finding challenges existing models of cosmic evolution and suggests that our understanding of black hole formation might need a major revision. The implications could reshape our knowledge of the early universe and the rapid development of its most massive structures.