Results 21 to 30 of about 4,760 (150)
Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment [PDF]
, 2017 Here we review how environmental context can be used to interpret whether O2 is a biosignature in extrasolar planetary observations. This paper builds on the overview of current biosignature research discussed in Schwieterman et al.
Arney, Giada N +15 more
core +3 more sources
The Ground-Based BIOMEX Experiment Verification Tests for Life Detection on Mars
Life, 2021 The success of an astrobiological search for life campaign on Mars, or other planetary bodies in the Solar System, relies on the detectability of past or present microbial life traces, namely, biosignatures.
Claudia Pacelli +8 more
doaj +1 more source
Challenges, 2014 The past decade has seen an explosion of new technologies for assessment of biogenicity and syngeneity of carbonaceous material within sedimentary rocks.
Dorothy Z. Oehler, Sherry L. Cady
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2021 The signatures of element isotope fractionation can be used for the indirect identification of extant or extinct life on planetary surfaces or their moons.
Andreas Riedo +9 more
doaj +1 more source
A Framework for Relative Biosignature Yields from Future Direct Imaging Missions
, 2021 Future exoplanet direct imaging missions, such as HabEx and LUVOIR, will select target stars to maximize the number of Earth-like exoplanets that can have their atmospheric compositions characterized.
Noah Tuchow, Jason Wright
core +1 more source
Morphological Biosignatures in Volcanic Rocks – Applications for Life Detection on Mars
Frontiers in Earth Science, 2019 The exploration of Mars is largely based on comparisons with Earth analog environments and processes. The up-coming NASA Mars mission 2020 and ExoMars 2020 has the explicit aim to search for signs of life on Mars.
Magnus Ivarsson +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 Pyrite (FeS2) is the most common iron sulfide on the Earth's surface and has widely been used as a paleo‐environmental proxy. Yet the information recorded by pyrite depends on whether it was formed through abiotic or biogenic routes.
Arnaud Duverger +4 more
doaj +1 more source
, 2022 This short report describes the most relevant results of screening compounds with a similar predicted biosignature as remdesivir in a VeroE6 cell-based anti-SARS-CoV-2 ...
Van Damme, Ellen
core +1 more source
Expanding the taxonomic and environmental extent of an underexplored carbon metabolism—oxalotrophy
Frontiers in Microbiology, 2023 Oxalate serves various functions in the biological processes of plants, fungi, bacteria, and animals. It occurs naturally in the minerals weddellite and whewellite (calcium oxalates) or as oxalic acid.
Alexander Sonke +1 more
doaj +1 more source
Frontiers in Microbiology, 2022 Deserts represent extreme habitats where photosynthetic life is restricted to the lithic niche. The ability of rock-inhabiting cyanobacteria to modify their photosynthetic apparatus and harvest far-red light (near-infrared) was investigated in 10 strains
Daniela Billi +10 more
doaj +1 more source