Materials2026-04-141 minarXiv:2604.12222expressHydrogen Made the Moon's Core LighterPreviously it was thought that hydrogen barely mixes with liquid iron at low pressure, so it wasn't expected in the Moon's core. New experiments have flipped that view.Jun Takeshita·Kei Hirose·Suyu Fu·Fumiya Sakai·Koutaro HikosakaAlbert EinsteinEnrico FermiErwin Schrödingerironhydrogen👍👎☆SimplePopularAdvanced