arXiv (2026). DOI: 10.48550/arxiv.2605.00763"> Left: Black hole mass growth history in COLA1/NEPLA assuming various Eddington ratios. Middle: Stellar mass growth history inferred from the best-fit BAGPIPES star-formation history. Right: Black hole to stellar mass ratio for NEPLA4 and COLA1, JWST AGN and high-redshift quasars. Credit: arXiv (2026). DOI: 10.48550/arxiv.2605.00763 Astronomers have discovered two early-universe galaxies where the central black holes appear to have grown far faster than their host galaxies. Observations with the James Webb Space Telescope (JWST) reveal that the black holes in these galaxies, seen just 800 million years after the Big Bang, are significantly more massive relative to their host galaxies, as opposed to what astronomers see in the nearby universe. The study is published on the arXiv preprint server.…