Astrophysicists at the University of Copenhagen show that the enigmatic ‘little red dots’ — red sources scattered across images of the early Universe — are rapidly growing black holes wrapped in ionized gas, offering new insight into how supermassive black holes formed after the Big Bang. Little red dots are young supermassive black holes in dense ionized cocoons. Image credit: NASA / ESA / CSA / Webb / Rusakov et al., doi: 10.1038/s41586-025-09900-4. Since...
