Accuracy and Reliability in the Simulation of Vibrational Spectra: A Comprehensive Benchmark of Energies and Intensities Issuing From Generalized Vibrational Perturbation Theory to... by Qin Yang, Marco Mendolicchio, Vincenzo Barone, Julien Bloino

“…Vibrational spectroscopy represents an active frontier for the identification and characterization of molecular species in the context of astrochemistry and astrobiology. As new missions will provide more data over broader ranges and at higher resolution, especially in the infrared region, which could be complemented with new spectrometers in the future, support from laboratory experiments and theory is crucial. …”
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Response of cyanobacterial mats to ambient phosphate fluctuations: phosphorus cycling, polyphosphate accumulation and stoichiometric flexibility by Laura Jentzsch, Hans-Peter Grossart, Sascha Plewe, Dirk Schulze-Makuch, Tobias Goldhammer

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Establishment of the Coast Range ophiolite microbial observatory (CROMO): drilling objectives and preliminary outcomes by D. Cardace, T. Hoehler, T. McCollom, M. Schrenk, D. Carnevale, M. Kubo, K. Twing

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Exploring the Deep Marine Biosphere: Challenges, Innovations, and Opportunities by Anaïs Cario, Anaïs Cario, Gina C. Oliver, Karyn L. Rogers, Karyn L. Rogers

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Nature of Acquired Immune Responses, Epitope Specificity and Resultant Protection from SARS-CoV-2 by Reginald M. Gorczynski, Robyn A. Lindley, Edward J. Steele, Nalin Chandra Wickramasinghe

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Cloning, overexpression, purification, and characterization of a polyextremophilic β-galactosidase from the Antarctic haloarchaeon <it>Halorubrum lacusprofundi</it> by Karan Ram, Capes Melinda D, DasSarma Priya, DasSarma Shiladitya

“…This study provides a system for better understanding how <it>H. lacusprofundi</it> is successful in a perennially cold, hypersaline environment, with relevance to astrobiology.</p>…”
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Screening of Spore-Forming Bacteria with Probiotic Potential in Pristine Algerian Caves by Baraa Rehamnia, Natuschka M. Lee, Ramune Kuktaite, Noreddine Kacem Chaouche

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Characterizing Interstellar Medium, Planetary Surface and Deep Environments by Spectroscopic Techniques Using Unique Simulation Chambers at Centro de Astrobiologia (CAB) by Eva Mateo-Marti, Olga Prieto-Ballesteros, Guillermo Muñoz Caro, Cristobal González-Díaz, Victoria Muñoz-Iglesias, Santos Gálvez-Martínez

“…At present, the study of diverse habitable environments of astrobiological interest has become a major challenge. …”
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Comparison between ozone column depths and methane lifetimes computed by one- and three-dimensional models at different atmospheric O2 levels by A. Ji, J. F. Kasting, G. J. Cooke, D. R. Marsh, K. Tsigaridis

“…(Segura et al. 2003 Astrobiology 3, 689–708. (doi:10.1089/153110703322736024)), may have overestimated the ozone column depth at low pO2, and hence also overestimated the lifetime of methane. …”
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Surface Volatile Composition as Evidence for Hydrothermal Processes Lasting Longer in Triton’s Interior than Pluto’s by Kathleen Mandt, Adrienn Luspay-Kuti, Olivier Mousis, Sarah E. Anderson

“…Ocean worlds, or icy bodies in the outer solar system that have or once had subsurface liquid water oceans, are among the most compelling topics of astrobiology. Typically, confirming the existence of a subsurface ocean requires close spacecraft observations. …”
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The Phanerozoic diversification of silica-cycling testate amoebae and its possible links to changes in terrestrial ecosystems by Lahr, Daniel J.G., Bosak, Tanja, Lara, Enrique, Mitchell, Edward A.D.

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Lack of Methylated Hopanoids Renders the Cyanobacterium Nostoc punctiforme Sensitive to Osmotic and pH Stress by Garby, Tamsyn J., Matys, Emily, Ongley, Sarah E., Salih, Anya, Larkum, Anthony W. D., Walter, Malcolm R., Summons, Roger E, Neilan, Brett A.

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Lipid Biomarker Record of the Serpentinite-Hosted Ecosystem of the Samail Ophiolite, Oman and Implications for the Search for Biosignatures on Mars by Newman, Sharon A, Lincoln, Sara A, O'Reilly, Shane, Liu, Xiaolei, Shock, Everett L, Kelemen, Peter B, Summons, Roger E

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Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres by Zhan, Zhuchang, Seager, Sara, Petkowski, Janusz Jurand, Sousa-Silva, Clara, Ranjan, Sukrit, Huang, Jingcheng, Bains, William

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The Venusian Lower Atmosphere Haze as a Depot for Desiccated Microbial Life: A Proposed Life Cycle for Persistence of the Venusian Aerial Biosphere by Seager, Sara, Petkowski, Janusz J, Gao, Peter, Bains, William, Bryan, Noelle C, Ranjan, Sukrit, Greaves, Jane

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Venus Life Finder Habitability Mission: Motivation, Science Objectives, and Instrumentation by Seager, Sara, Petkowski, Janusz J., Carr, Christopher E., Saikia, Sarag J., Agrawal, Rachana, Buchanan, Weston P., Grinspoon, David H., Weber, Monika U., Klupar, Pete, Worden, Simon P., Iakubivskyi, Iaroslav, Pajusalu, Mihkel, Kaasik, Laila, on behalf of the Venus Life Finder Mission Team

“…We envision an instrument suite to measure not only the acidity and water content of the droplets (and their variability) but additionally to confirm the presence of metals and other non-volatile elements required for life&rsquo;s metabolism, verify the existence of organic material, and search for biosignature gases as signs of life. We present an astrobiology-focused mission, science goals, and instruments that can be used on both a large atmospheric probe with a parachute lasting about one hour in the cloud layers (40 to 60 km) or a fixed-altitude balloon operating at about 52 km above the surface. …”
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Microaerobic steroid biosynthesis and the molecular fossil record of Archean life by Waldbauer, Jacob R., Newman, Dianne K, Summons, Roger E

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Oxygen-Dependent Morphogenesis of Modern Clumped Photosynthetic Mats and Implications for the Archean Stromatolite Record by Sim, Min Sub, Liang, Biqing, Petroff, Alexander P., Evans, Alex J., Klepac-Ceraj, Vanja, Flannery, David T., Walter, Malcolm R., Bosak, Tanja

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Identification and characterization of Rhodopseudomonas palustris TIE-1 hopanoid biosynthesis mutants by Doughty, David M., Wu, C.-H., Newman, Dianne K., Welander, Paula V., Mehay, S., Summons, Roger E

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High-precision timeline for Earth's most severe extinction by Bowring, Samuel A., Shen, Shu-zhong, Burgess, Seth

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