Nature Geoscience, Published online: 15 June 2026; doi:10.1038/s41561-026-02000-6

Time-resolved X-ray diffraction experiments in a laser-heated diamond anvil cell suggest that hydrogen in iron hydride becomes highly mobile at Earth’s core pressures and high temperatures. The measurements provide experimental indications of a superionic state in which hydrogen moves through a crystalline iron lattice.

Nature Geoscience, Published online: 15 June 2026; doi:10.1038/s41561-026-02013-1

While most newly formed organic carbon in the dark ocean is derived from chemolithoautotrophic microorganisms, 17% also comes from an alternative pathway called anaplerosis that is related to the tricarboxylic acid cycle, according to multi-omics datasets and single-cell analysis.