Nature, Published online: 06 November 2024; doi:10.1038/s41586-024-08074-9

Analysis of the stellar population properties of 30 host galaxies of fast radio bursts (FRBs) suggests an abundance of FRBs in massive star-forming galaxies, and implies that the formation of FRB sources—magnetars—is linked to core-collapse supernovae of stellar merger remnants.