It is often acknowledged that the search for life on Mars might produce false positive results,
particularly via the detection of objects, patterns or substances that resemble the products of …

Methanogenesis is considered to be the dominant type of biodegradation in subsurface oil
reservoirs; however, this process is difficult to identify under geological environments. In this …

Carbon is the key element of life, and its origin in ancient sedimentary rocks is central to
questions about the emergence and early evolution of life. The oldest well-preserved carbon …

The aqueous alteration of the oceanic lithosphere provides significant energy that impacts
the synthesis and diversity of organic compounds, which are crucial for the deep carbon …

The Earth's deep biosphere hosts some of its most ancient chemolithotrophic lineages. The
history of habitation in this environment is thus of interest for understanding the origin and …

Earth's crust contains a substantial proportion of global biomass, hosting microbial life up to
several kilometers depth. Yet, knowledge of the evolution and extent of life in this …

Large igneous provinces (LIPs) are major magmatic events that have a significant impact on
the global environment and the biosphere, for example as triggers of mass extinctions. LIPs …

Franz et al.(2023) report a diverse and three-dimensionally preserved suite of mid-
Proterozoic microfossils from miarolitic cavities within the granitic Volyn pegmatite field, a …

The search for a fossil record of Earth's deep biosphere, partly motivated by potential
analogies with subsurface habitats on Mars, has uncovered numerous assemblages of …

Deep fracture‐hosted fluids of Precambrian bedrock cratons are relatively stagnant over
long time spans compared to near‐surface systems. However, episodic events, such as …