Author(s): J. Balibrea-Correa et al. (n_TOF Collaboration) Isotopic measurements of presolar silicon carbide grains from dying stars have revealed a puzzling overabundance of $^{94}\mathrm{Mo}$ that stellar nucleosynthesis models have failed to reproduce for two decades. This discrepancy challenged our understanding of the slow neutron-capture process ($s$-… [Phys. Rev. Lett. 137, 082701] Published Tue Aug 18, 2026