FRB 20240304B was detected in March 2024 by a South African radio array. JWST spectroscopy now fixes its host at redshift 2.148 ± 0.0013, more than ten billion light-years away, when the universe was about three billion years old. The low-mass, metal-poor host is actively forming stars. Combined with the burst's strong temporal scattering, that makes a young magnetar more plausible for this event than an old neutron-star merger—and suggests present surveys may miss other distant, heavily scattered bursts. It is a host-specific inference, not a universal solution to the FRB-origin problem. NASA · Science · University of Sydney