Nature CommunicationsPyrrhotite-driven early-stage terrestrial alteration in Ryugu grainsMasaaki MiyaharaTakaaki NoguchiToru MatsumotoNaotaka TomiokaTohru ArakiAkira MiyakeYohei IgamiYusuke SetoAkira Yamaguchi2026-05-29Full textDOI https://doi.org/10.1038/s41467-026-73875-7