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 …

In the coming years and decades, advanced space-and ground-based observatories will
allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially …

The origin of life is a fascinating, unresolved problem whose deciphering would have
important scientific, epistemological and social implications. Over time, philosophers and …

The origin of life on Earth seems to demand a highly reduced early atmosphere, rich in CH
4, H 2, and NH 3, but geological evidence suggests that Earth's mantle has always been …

Abstract The Archean era (4 to 2.5 billion years ago, Ga) yielded rocks that include the
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …

Magmatic outgassing of volatiles from Earth's interior probably played a critical part in
determining the composition of the earliest atmosphere, more than 4,000 million years (Myr) …

Exchange between a magma ocean and vapor produced Earth's earliest atmosphere. Its
speciation depends on the oxygen fugacity (f O2) set by the Fe3+/Fe2+ ratio of the magma …

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 …

Abstract Sediment-hosted Pb-Zn deposits can be divided into two major subtypes. The first
subtype is clastic-dominated lead-zinc (CD Pb-Zn) ores, which are hosted in shale …

Liquid water is essential for life as we know it, ie carbon-based life. Although other
compound-solvent pairs that could exist in very specific physical environments could be …