Reflecting on Our Present Self‐Awareness of Not Having Found Any Life Beyond Earth by Stuart F. Taylor, Jonathan H. Jiang, Nick Searra, Philip E. Rosen

“…Recording our search for extraterrestrial life is crucial. It’s a way for future generations or even other civilizations to understand our era and our views of the cosmos. …”
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Venus Life Finder Missions Motivation and Summary by Seager, Sara, Petkowski, Janusz J., Carr, Christopher E., Grinspoon, David H., Ehlmann, Bethany L., Saikia, Sarag J., Agrawal, Rachana, Buchanan, Weston P., Weber, Monika U., French, Richard, Klupar, Pete, Worden, Simon P., Baumgardner, Darrel, on behalf of the Venus Life Finder Mission Team

“…Finding evidence of extraterrestrial life would be one of the most profound scientific discoveries ever made, advancing humanity into a new epoch of cosmic awareness. …”
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Variations in climate habitability parameters and their effect on Earth's biosphere during the Phanerozoic Eon by Iva Vilović, Dirk Schulze-Makuch, René Heller

“…Beyond Earth, these results will help us to understand how environmental parameters affect biospheres on extrasolar planets and guide us in our search for extraterrestrial life.…”
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Sulfur- and iron-rich mineralogical features preserved in permafrost in the Canadian High Arctic: Analogs for the astrobiological exploration of Mars by Lau, GE, Trivedi, CB, Grasby, SE, Spear, JR, Cosmidis, J, Templeton, AS

“…We also consider how such geological sulfide emplacements and their weathered surface expressions may provide a target for future surface and remote sensing studies of Mars and in the search for extraterrestrial life.…”

Importance of laboratory experimental studies of silicate grains for exoplanet atmosphere characterization by Alexey Potapov, Jeroen Bouwman

“…Moreover, studies of exoplanets as being linked to the search for extraterrestrial life and other habitable planets are of interest not only for scientists, but for a much wider public audience. …”
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Trace Element Concentrations Associated with Mid-Paleozoic Microfossils as Biosignatures to Aid in the Search for Life by Andrew Gangidine, Malcolm R. Walter, Jeff R. Havig, Clive Jones, Daniel M. Sturmer, Andrew D. Czaja

“…Because some of the oldest fossils on Earth are found in hot spring deposits and ancient hot spring deposits are also thought to occur on Mars, this biosignature technique may be utilized as a valuable tool to aid in the search for extraterrestrial life.…”
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AcidopHiles : a not- so-basic life by McPherson, Stephanie M. (Stephanie Mae)

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Volcanogenic pseudo-fossils from the ~3.48 Ga Dresser Formation, Pilbara, Western Australia by Wacey, D, Noffke, N, Saunders, M, Guagliardo, P, Pyle, D

“…However, reworked, isolated and silicified microstructures of this type may prove particularly problematical in early or extraterrestrial life studies since they adsorb carbon onto their surfaces and are readily pyritised, mimicking a common preservation mechanism for bona fide microfossils. …”

The timing of evolutionary transitions suggests intelligent life is rare by Snyder-Beattie, AE, Sandberg, A, Drexler, KE, Bonsall, MB

“…It is unknown how abundant extraterrestrial life is, or whether such life might be complex or intelligent. …”

Six ‘Must-Have’ Minerals for Life’s Emergence: Olivine, Pyrrhotite, Bridgmanite, Serpentine, Fougerite and Mackinawite by Michael J. Russell, Adrian Ponce

“…The fact that wet and rocky bodies in the solar system much smaller than Earth or Venus do not reach the internal pressure (≥23 GPa) requirements in their mantles sufficient for producing bridgmanite and, therefore, are too reduced to stabilize and emit CO₂—the staple of life—may explain the apparent absence or negligible concentrations of that gas on these bodies, and thereby serves as a constraint in the search for extraterrestrial life. The astrobiological challenge then is to search for worlds that (i) are large enough to generate internal pressures such as to produce bridgmanite or (ii) boast electron acceptors, including imported CO₂, from extraterrestrial sources in their hydrospheres.…”
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Remote Laser Induced Fluorescence of Soils and Rocks by Vasily N. Lednev, Alexey F. Bunkin, Sergey M. Pershin, Mikhail Ya. Grishin, Diana G. Artemova, Vladimir A. Zavozin, Pavel A. Sdvizhenskii, Raul A. Nunes

“…The perspectives of LIDAR sensing of organic samples deposited at soils and rock have been discussed including future space exploration missions in the search for extraterrestrial life.…”
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Origins of building blocks of life: A review by Norio Kitadai, Shigenori Maruyama

“…Keywords: Astrobiology, Biochemistry, Chemical evolution, Extraterrestrial life, Hadean Earth, Hydrothermal systems…”
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Spectroscopic Detection of Biosignatures in Natural Ice Samples as a Proxy for Icy Moons by Francisco Calapez, Rodrigo Dias, Rute Cesário, Diogo Gonçalves, Bruno Pedras, João Canário, Zita Martins

“…Some of the icy moons of the solar system with a subsurface ocean, such as Europa and Enceladus, are the targets of future space missions that search for potential extraterrestrial life forms. While the ice shells that envelop these moons have been studied by several spacecrafts, the oceans beneath them remain unreachable. …”
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Unsolved Problems in Biology / by Ezell, Frederick, author 648591

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Effect of Space Flight Factor on Dormant Stages in Aquatic Organisms: A Review of International Space Station and Terrestrial Experiments by Victor R. Alekseev, Jiang-Shiou Hwang, Margarita A. Levinskikh

“…It also can be used for creating an extraterrestrial artificial ecosystem and searching for extraterrestrial life.…”
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A predictive model for the ichnological suitability of the Jezero crater, Mars: searching for fossilized traces of life-substrate interactions in the 2020 Rover Mission Landing Sit... by Andrea Baucon, Carlos Neto de Carvalho, Antonino Briguglio, Michele Piazza, Fabrizio Felletti

“…Ichnofossils offer unique advantages in the search for extraterrestrial life, including the fact that they are resilient to processes that obliterate other evidence for past life, such as body fossils, as well as chemical and isotopic biosignatures. …”
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Venus Life Finder Missions Motivation and Summary by Sara Seager, Janusz J. Petkowski, Christopher E. Carr, David H. Grinspoon, Bethany L. Ehlmann, Sarag J. Saikia, Rachana Agrawal, Weston P. Buchanan, Monika U. Weber, Richard French, Pete Klupar, Simon P. Worden, Darrel Baumgardner, on behalf of the Venus Life Finder Mission Team

“…Finding evidence of extraterrestrial life would be one of the most profound scientific discoveries ever made, advancing humanity into a new epoch of cosmic awareness. …”
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Earliest microbially mediated pyrite oxidation in ~3.4 billion-year-old sediments by Wacey, D, Saunders, M, Brasier, M, Kilburn, MR

“…These data extend the geological range of microbes capable of metabolising reduced Fe and/or S compounds back to the early Archean and indicate that pyrite-rich sedimentary rocks provide promising targets in the search for extraterrestrial life. © 2010 Elsevier B.V.…”

Detecting Proxima b's atmosphere with JWST targeting CO2 at 15 μm using a high-pass spectral filtering technique by Snellen, IAG, Désert, J-M, Waters, LBFM, Robinson, T, Meadows, V, van Dishoeck, EF, Brand l, BR, Henning, T, Bouwman, J, Lahuis, F, Min, M, Lovis, C, Dominik, C, Van Eylen, V, Sing, D, Anglada-Escudé, G, Birkby, JL, Brogi, M

“…<p>Exoplanet Proxima b will be an important laboratory for the search for extraterrestrial life for the decades ahead. Here, we discuss the prospects of detecting carbon dioxide at 15&nbsp;<em>&mu;</em>m using a spectral filtering technique with the Medium Resolution Spectrograph (MRS) mode of the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope (<em>JWST</em>). …”

Characterisation of exoplanet atmospheres using high-resolution spectroscopy by van Sluijs, L

“…The characterisation of exoplanet atmospheres is crucial to understanding planet formation, the exploration of extreme atmospheric physics, finding habitable worlds, and searching for extraterrestrial life, but challenged by the overwhelming star-to-exoplanet flux contrast. …”