Credits Top: NASA and STScI under Contract NAS5-03127 (left); Rubin Obs/NSF/AURA (centre); Krzysztof Ulaczyk (right). Middle: NASA's Goddard Space Flight Center/CI Lab (left); NASA, ESA, J. Lotz and the HFF team (centre); Marco Gullieuszik et al., 2023, ApJ, 954, 54 (right). Bottom: International Gemini Observatory / NOIRLab / NSF / AURA / M. Zamani (left); Dan Ryczanowski et al., 2023, MNRAS, 520, 2557 (centre); Krzysztof Ulaczyk (right).