Supermassive black holes - long believed to be the giant gluttons of the cosmos — may not be quite as enormous as we thought. Astronomers studying a galaxy 12 billion light-years away discovered that one of these so-called monsters was 10 times smaller than expected. The finding suggests scientists have been overestimating their mass for years, solving two long-standing puzzles about how black holes and galaxies grew after the Big Bang. #blackhole #science #space