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Early Archean fossil bacteria and biofilms in hydrothermally-influenced sediments from the Barberton greenstone belt, South Africa

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The nature of fossil bacteria: A guide to the search for extraterrestrial life

In an attempt to establish reliable criteria for the identification of potential fossil life in extraterrestrial materials, the fossilizable characteristics of bacteria, namely, size, shape, cell…
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The 3.466 Ga "Kitty's Gap Chert," an early Archean microbial ecosystem

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Biosignatures on Mars: What, Where, and How? Implications for the Search for Martian Life

TLDR
It is hypothesized that, given the lack of long-term, continuous habitability, if martian life developed, it was (and may still be) chemotrophic and anaerobic, and the biogenicity of these signatures is evaluated by comparing them to possible abiotic features.
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Multiplication of microbes below 0.690 water activity: implications for terrestrial and extraterrestrial life.

TLDR
Water activity in relation to the limits of Earth's present-day biosphere; the possibility of microbial multiplication by utilizing water from thin, aqueous films or non-liquid sources; whether prokaryotes were the first organisms able to multiply close to the 0.605-aw limit; and whether extraterrestrial aQueous milieux of ≥ 0.605 aw can resemble fertile microbial habitats found on Earth.
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Habitability on Mars from a microbial point of view.

TLDR
Housing conditions for life to start, proliferate, and survive have been heterogeneous throughout its history and have a profound impact on the nature and distribution of eventual traces of martian life, or any precursor, and must therefore inform search-for-life strategies.
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Implications of in situ calcification for photosynthesis in a ~3.3 Ga-old microbial biofilm from the Barberton greenstone belt, South Africa

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Morphologic and spectral investigation of exceptionally well-preserved bacterial biofilms from the Oligocene Enspel formation, Germany

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Darwin--a mission to detect and search for life on extrasolar planets.

TLDR
A mission to detect rocky planets similar to Earth and perform spectroscopic analysis at mid-infrared wavelengths, where an advantageous contrast ratio between star and planet occurs, which will ignite intense interest in both the research community and the wider public.
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Microstructure and Biogeochemistry of the Organically Preserved Ediacaran Metazoan Sabellidites

Abstract Metazoans (multicellular animals) evolved during the Ediacaran Period as shown by the record of their imprints, carbonaceous compressions, trace fossils, and organic bodies and skeletal…
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