Using an interdisciplinary approach, this paper reviews current knowledge in the field of
natural hydrogen. For the first time, it combines perspectives on hydrogen from the literature …

Natural gas hydrate is ice‐like mixture of gas (mostly methane) and water that is widely
found in sediments along the world's continental margins and within and beneath permafrost …

Methane has been proposed as an exoplanet biosignature. Imminent observations with the
James Webb Space Telescope may enable methane detections on potentially habitable …

As the search for Earth-like exoplanets gathers pace, in order to understand them, we need
comprehensive theories for how planetary atmospheres form and evolve. Written by two well …

The aqueous alteration of ultramafic rocks through serpentinization liberates mantle carbon
and reducing power. Serpentinization occurs in numerous settings on present day Earth …

Hydrothermal circulation and alteration at mid-ocean ridges and ridge flanks have a key role
in regulating seawater chemistry and global chemical fluxes, and support diverse …

Natural or native molecular hydrogen (H2) can be a major component in natural gas, and yet
its role in the global energy sector's usage as a clean energy carrier is not normally …

Chemical disequilibrium in planetary atmospheres has been proposed as a generalized
method for detecting life on exoplanets through remote spectroscopy. Among solar system …

Microbial ecosystems can be sustained by hydrogen gas (H2)-producing water–rock
interactions in the Earth's subsurface and at deep ocean vents,,,. Current estimates of global …

Geological sources of H2 and abiotic CH4 have had a critical role in the evolution of our
planet and the development of life and sustainability of the deep subsurface biosphere. Yet …