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 …

Interspecies electron transfer is a key process in methanogenic and sulphate-reducing
environments. Bacteria and archaea that live in syntrophic communities take advantage of …

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river
deposits. We report observations of the crater floor, below the crater's sedimentary delta …

Dihydrogen (H2) is a promising source of energy in the field of energy transition. Similarly to
natural gas, identifying storage solutions for large volumes of H2 is essential. Geological …

Hydrogen is a key energy source for subsurface microbial processes, particularly in
subsurface environments with limited alternative electron donors, and environments that are …

If the atmosphere of the early Earth was hydrogen-rich, 1 it is reasonable to think that
hydrogenases, the enzymes enabling cells to use molecular hydrogen, were probably …

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

A committee of the Mars Exploration Program Analysis Group (MEPAG) has reviewed and
updated the description of Special Regions on Mars as places where terrestrial organisms …

The search for traces of life is one of the principal objectives of Mars exploration. Central to
this objective is the concept of habitability, the set of conditions that allows the appearance …

We have developed a technique for cultivation of chemolithoautotrophs under high
hydrostatic pressures that is successfully applicable to various types of deep-sea …