Cosmology2026-06-023 minarXiv:2606.03414Roots from the Abyss: The Secret Growth of Supermassive Black HolesThe expansion of the universe, discovered by Edwin Hubble, gave us a picture of the young cosmos, but along with it — difficult questions.Chunshan LinFirst law of black hole mechanicsHawking radiationJacob BekensteinStephen HawkingJohn Archibald WheelerAccretion diskprimordial black holeblack holeblack hole mergerdark energy👍👎☆SimplePopularAdvanced