Astrobiology

Article	Citations
The Hot Spring Hypothesis for an Origin of Life	209
Earth's Impact Events Through Geologic Time: A List of Recommended Ages for Terrestrial Impact Structures and Deposits	90
Phosphine as a Biosignature Gas in Exoplanet Atmospheres	77
Oxia Planum: The Landing Site for the ExoMars “Rosalind Franklin” Rover Mission: Geological Context and Prelanding Interpretation	76
Hydrothermal Chemistry and the Origin of Cellular Life	60
Oxygenation, Life, and the Planetary System during Earth's Middle History: An Overview	56
Toward the RNA-World in the Interstellar Medium—Detection of Urea and Search of 2-Amino-oxazole and Simple Sugars	56
The Venusian Lower Atmosphere Haze as a Depot for Desiccated Microbial Life: A Proposed Life Cycle for Persistence of the Venusian Aerial Biosphere	55
Deciphering Biosignatures in Planetary Contexts	55
Paleo-Rock-Hosted Life on Earth and the Search on Mars: A Review and Strategy for Exploration	50
Terrestrial Hot Spring Systems: Introduction	48
The Role of Meteorite Impacts in the Origin of Life	48
The Case for Ancient Hot Springs in Gusev Crater, Mars	44
Mars Extant Life: What's Next? Conference Report	44
First Detections of Dichlorobenzene Isomers and Trichloromethylpropane from Organic Matter Indigenous to Mars Mudstone in Gale Crater, Mars: Results from the Sample Analysis at Mars Instrument Onboard	43
Ceres: Astrobiological Target and Possible Ocean World	40
Fluvial Regimes, Morphometry, and Age of Jezero Crater Paleolake Inlet Valleys and Their Exobiological Significance for the 2020 Rover Mission Landing Site	38
Phosphine on Venus Cannot Be Explained by Conventional Processes	34
Venus, an Astrobiology Target	31
Morphological and Spectral Diversity of the Clay-Bearing Unit at the ExoMars Landing Site Oxia Planum	30
Elements for the Origin of Life on Land: A Deep-Time Perspective from the Pilbara Craton of Western Australia	30
Analog Experiments for the Identification of Trace Biosignatures in Ice Grains from Extraterrestrial Ocean Worlds	29
Discriminating Abiotic and Biotic Fingerprints of Amino Acids and Fatty Acids in Ice Grains Relevant to Ocean Worlds	29
Cometary Delivery of Hydrogen Cyanide to the Early Earth	25
The Intersection of Geology, Geochemistry, and Microbiology in Continental Hydrothermal Systems	25

Bacterial Growth in Chloride and Perchlorate Brines: Halotolerances and Salt Stress Responses ofPlanococcus halocryophilus	24
Water Activities of Acid Brine Lakes Approach the Limit for Life	23
Earth-like Habitable Environments in the Subsurface of Mars	23
Understanding Hypervelocity Sampling of Biosignatures in Space Missions	23
Enceladus: First Observed Primordial Soup Could Arbitrate Origin-of-Life Debate	23
Investigating Habitability with an Integrated Rock-Climbing Robot and Astrobiology Instrument Suite	21
The Timing of Evolutionary Transitions Suggests Intelligent Life is Rare	21
Formation and Preservation of Microbial Palisade Fabric in Silica Deposits from El Tatio, Chile	21
Biomarker Profiling of Microbial Mats in the Geothermal Band of Cerro Caliente, Deception Island (Antarctica): Life at the Edge of Heat and Cold	21
One-Pot Hydrogen Cyanide-Based Prebiotic Synthesis of Canonical Nucleobases and Glycine Initiated by High-Velocity Impacts on Early Earth	21
Biomolecules from Fossilized Hot Spring Sinters: Implications for the Search for Life on Mars	20
A Reconstructed Subaerial Hot Spring Field in the ∼3.5 Billion-Year-Old Dresser Formation, North Pole Dome, Pilbara Craton, Western Australia	20
Abiotic Synthesis of Nucleoside 5′-Triphosphates with Nickel Borate and Cyclic Trimetaphosphate (CTMP)	19
Circular Spectropolarimetric Sensing of Vegetation in the Field: Possibilities for the Remote Detection of Extraterrestrial Life	19
Catalytic Synthesis of Polyribonucleic Acid on Prebiotic Rock Glasses	17
Magma Ocean Evolution of the TRAPPIST-1 Planets	17
Potential for Phototrophy in Venus' Clouds	17
Simulating Serpentinization as It Could Apply to the Emergence of Life Using the JPL Hydrothermal Reactor	17
Fusarium oxysporumas an Opportunistic Fungal Pathogen onZinnia hybridaPlants Grown on board the International Space Station	17
BioSentinel: Long-Term Saccharomyces cerevisiae Preservation for a Deep Space Biosensor Mission	17
Simulating Mars Drilling Mission for Searching for Life: Ground-Truthing Lipids and Other Complex Microbial Biomarkers in the Iron-Sulfur Rich Río Tinto Analog	17
Lichen Vitality After a Space Flight on Board the EXPOSE-R2 Facility Outside the International Space Station: Results of the Biology and Mars Experiment	17
Lipid Biomarker Record of the Serpentinite-Hosted Ecosystem of the Samail Ophiolite, Oman and Implications for the Search for Biosignatures on Mars	17
ExoMars Raman Laser Spectrometer: A Tool for the Potential Recognition of Wet-Target Craters on Mars	16
Bacterial Cellulose Retains Robustness but Its Synthesis Declines After Exposure to a Mars-like Environment Simulated Outside the International Space Station	16
Large Mass-Independent Oxygen Isotope Fractionations in Mid-Proterozoic Sediments: Evidence for a Low-Oxygen Atmosphere?	16
Thiophenes on Mars: Biotic or Abiotic Origin?	15
The Complex Molecules Detector (CMOLD): A Fluidic-Based Instrument Suite to Search for (Bio)chemical Complexity on Mars and Icy Moons	15
The Detection of Elemental Signatures of Microbes in Martian Mudstone Analogs Using High Spatial Resolution Laser Ablation Ionization Mass Spectrometry	15
Phosphine Generation Pathways on Rocky Planets	15
Mawrth Vallis, Mars: A Fascinating Place for Future In Situ Exploration	15
Estimated Minimum Life Span of the Jezero Fluvial Delta (Mars)	15
BioSentinel: A Biological CubeSat for Deep Space Exploration	15
Metabolomics as an Emerging Tool in the Search for Astrobiologically Relevant Biomarkers	15
Physiology, Metabolism, and Fossilization of Hot-Spring Filamentous Microbial Mats	14
The Production and Potential Detection of Hexamethylenetetramine-Methanol in Space	14
Nucleic Acid Extraction and Sequencing from Low-Biomass Synthetic Mars Analog Soils forIn SituLife Detection	14
Microbial Sulfur Isotope Fractionation in the Chicxulub Hydrothermal System	14
Organic Records of Early Life on Mars: The Role of Iron, Burial, and Kinetics on Preservation	14
The Albedo of Ryugu: Evidence for a High Organic Abundance, as Inferred from the Hayabusa2 Touchdown Maneuver	14
Timescales for Prebiotic Photochemistry Under Realistic Surface Ultraviolet Conditions	14
Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres	13
In Situ Geochronology on Mars and the Development of Future Instrumentation	13
The Limits, Capabilities, and Potential for Life Detection with MinION Sequencing in a Paleochannel Mars Analog	13
Exo-Ocean Exploration with Deep-Sea Sensor and Platform Technologies	13
Comprehensive Search of Stable Isomers of Alanine and Alanine Precursors in Prebiotic Syntheses	13
An Alternative Approach for Assessing Biogenicity	13
In Search for a Planet Better than Earth: Top Contenders for a Superhabitable World	13
Growth ofLactobacillus reuteriDSM17938 Under Two Simulated Microgravity Systems: Changes in Reuterin Production, Gastrointestinal Passage Resistance, and Stress Genes Expression Response	13
Biosignature Analysis of Mars Soil Analogs from the Atacama Desert: Challenges and Implications for Future Missions to Mars	13

The Search for a Signature of Life on Mars: A Biogeomorphological Approach	12
Assessment of Ammonia as a Biosignature Gas in Exoplanet Atmospheres	12
Preliminary Planning for Mars Sample Return (MSR) Curation Activities in a Sample Receiving Facility (SRF)	12
Exobiology of the Venusian Clouds: New Insights into Habitability through Terrestrial Models and Methods of Detection	12
Boron Isotopes in the Puga Geothermal System, India, and Their Implications for the Habitat of Early Life	12
The Venus Life Equation	12
Determining the “Biosignature Threshold” for Life Detection on Biotic, Abiotic, or Prebiotic Worlds	11
Cometary Glycolaldehyde as a Source of pre-RNA Molecules	11
ExoMars Raman Laser Spectrometer: A Tool to Semiquantify the Serpentinization Degree of Olivine-Rich Rocks on Mars	11
When is Life a Viable Hypothesis? The Case of Venusian Phosphine	11
Bacterial Diversity of a High-Altitude Permafrost Thaw Pond Located on Ojos del Salado (Dry Andes, Altiplano-Atacama Region)	11
Thermal Heads for Melt Drilling to Subglacial Lakes: Design and Testing	11
Investigation of Venus Cloud Aerosol and Gas Composition Including Potential Biogenic Materials via an Aerosol-Sampling Instrument Package	10
Effects of Desiccation and Freezing on Microbial Ionizing Radiation Survivability: Considerations for Mars Sample Return	10
Uninhabitable and Potentially Habitable Environments on Mars: Evidence from Meteorite ALH 84001	10
Thermodynamic Impact of Mineral Surfaces on Amino Acid Polymerization: Aspartate Dimerization on Goethite	10
What Is Life—and When Do We Search for It on Other Worlds	10
Phosphorus in the Clouds of Venus: Potential for Bioavailability	10
The AMADEE-18 Mars Analog Expedition in the Dhofar Region of Oman	10
The Italian National Project of Astrobiology—Life in Space—Origin, Presence, Persistence of Life in Space, from Molecules to Extremophiles	10
Ancient Oil as a Source of Carbonaceous Matter in 1.88-Billion-Year-Old Gunflint Stromatolites and Microfossils	10
Obliquity Evolution of the Potentially Habitable Exoplanet Kepler-62f	10
Screening the Survival of Cyanobacteria Under Perchlorate Stress. Potential Implications for Mars In Situ Resource Utilization	10
Greenalite Nanoparticles in Alkaline Vent Plumes as Templates for the Origin of Life	9
Trace Element Concentrations in Hydrothermal Silica Deposits as a Potential Biosignature	9
Observational Constraints on the Great Filter	9
Science Objectives for Flagship-Class Mission Concepts for the Search for Evidence of Life at Enceladus	9
Laboratory Analysis of Returned Samples from the AMADEE-18 Mars Analog Mission	9
Influence of Calcium Perchlorate on the Search for Organics on Mars with Tetramethylammonium Hydroxide Thermochemolysis	9
Detection and Degradation of Adenosine Monophosphate in Perchlorate-Spiked Martian Regolith Analog, by Deep-Ultraviolet Spectroscopy	9
Detection of Biosignatures by Capillary Electrophoresis Mass Spectrometry in the Presence of Salts Relevant to Ocean Worlds Missions	9
Nitrogen Fixation at Early Mars	9
Are Impact Craters and Extinction Episodes Periodic? Implications for Planetary Science and Astrobiology	9
Cold, Dry, Windy, and UV Irradiated: Surveying Mars-Relevant Conditions in Ojos del Salado Volcano (Andes Mountains, Chile)	9
Habitability Models for Astrobiology	9
Microgravity Affects the Level of Matrix Polysaccharide 1,3:1,4-β-Glucans in Cell Walls of Rice Shoots by Increasing the Expression Level of a Gene Involved in Their Breakdown	9
Lipid Biomarkers in Ephemeral Acid Salt Lake Mudflat/Sandflat Sediments: Implications for Mars	9
Space Radiation Dosimetry at the Exposure Facility of the International Space Station for the Tanpopo Mission	9
Rapid Radiolytic Degradation of Amino Acids in the Martian Shallow Subsurface: Implications for the Search for Extinct Life	9
Chemical Ionization Mass Spectrometry: Applications for the In Situ Measurement of Nonvolatile Organics at Ocean Worlds	9
Molecular Muscle Experiment: Hardware and Operational Lessons for Future Astrobiology Space Experiments	8
Compaction and Destruction Cross-Sections for α-Glycine from Radiolysis Process via 1.0 keV Electron Beam as a Function of Temperature	8
Potential for Aerobic Methanotrophic Metabolism on Mars	8
Lipid Biomarker and Carbon Stable Isotope Survey on the Dallol Hydrothermal System in Ethiopia	8
Atmospheric Nitrogen When Life Evolved on Earth	8
Relevance of the Unfolded Protein Response to Spaceflight-Induced Transcriptional Reprogramming in Arabidopsis	8
A Drake Equation for Alien Artifacts	8
Extraction and Separation of Chiral Amino Acids for Life Detection on Ocean Worlds Without Using Organic Solvents or Derivatization	8
IntroducingVibrio natriegensas a Microbial Model Organism for Microgravity Research	8
Prokaryotic Diversity and Metabolically Active Communities in Brines from Two Perennially Ice-Covered Antarctic Lakes	8
Testing Flight-like Pyrolysis Gas Chromatography–Mass Spectrometry as Performed by the Mars Organic Molecule Analyzer Onboard the ExoMars 2020 Rover on Oxia Planum Analog Samples	8
Mars Sample Return (MSR): Planning for Returned Sample Science	8
Taxonomic Characterization and Microbial Activity Determination of Cold-Adapted Microbial Communities in Lava Tube Ice Caves from Lava Beds National Monument, a High-Fidelity Mars Analogue Environment	8
Revival of Anhydrobiotic Cyanobacterium Biofilms Exposed to Space Vacuum and Prolonged Dryness: Implications for Future Missions beyond Low Earth Orbit	8
Biologically Available Chemical Energy in the Temperate but Uninhabitable Venusian Cloud Layer: What Do We Want to Know?	8
Does the Evolution of Complex Life Depend on the Stellar Spectral Energy Distribution?	7
Surface and Oceanic Habitability of Trappist-1 Planets under the Impact of Flares	7
The Radiation Stability of Thymine in Solid H2O	7
Effects of Active Volcanism on Bacterial Communities in the Highest-Altitude Crater Lake of Ojos del Salado (Dry Andes, Altiplano-Atacama Region)	7
Fatty Acid Preservation in Modern and Relict Hot-Spring Deposits in Iceland, with Implications for Organics Detection on Mars	7
Mass Spectrometric Fingerprints of Bacteria and Archaea for Life Detection on Icy Moons	7
Synthesis of Phospholipids Under Plausible Prebiotic Conditions and Analogies with Phospholipid Biochemistry for Origin of Life Studies	7
Bacterial Growth in Brines Formed by the Deliquescence of Salts Relevant to Cold Arid Worlds	7
Planetary Protection Implementation on the Interior Exploration Using Seismic Investigations, Geodesy and Heat Transport Mission	7
Investigating the Effect of Perchlorate on Flight-like Gas Chromatography–Mass Spectrometry as Performed by MOMA on board the ExoMars 2020 Rover	7
Ice Shell Structure and Composition of Ocean Worlds: Insights from Accreted Ice on Earth	7
Final Report of the Mars Sample Return Science Planning Group 2 (MSPG2)	7
Impact of UV Radiation on the Raman Signal of Cystine: Implications for the Detection of S-rich Organics on Mars	7
Interrelationships in the Gypsum–Syngenite–Görgeyite System and Their Possible Formation on Mars	7
Adenine Adsorbed onto Montmorillonite Exposed to Ionizing Radiation: Essays on Prebiotic Chemistry	7
Media Optimization, Strain Compatibility, and Low-Shear Modeled Microgravity Exposure of Synthetic Microbial Communities for Urine Nitrification in Regenerative Life-Support Systems	7
Mineralogical and Spectral (Near-Infrared) Characterization of Fe-Rich Vermiculite-Bearing Terrestrial Deposits and Constraints for Mineralogy of Oxia Planum, ExoMars 2022 Landing Site	7
A Cruise-Phase Microbial Survival Model for Calculating Bioburden Reductions on Past or Future Spacecraft Throughout Their Missions with Application to Europa Clipper	7
Evaluating Biosignatures for Life Detection	7
Rationale and Proposed Design for a Mars Sample Return (MSR) Science Program	7
Microbially Induced Sedimentary Structures in Clastic Deposits: Implication for the Prospection for Fossil Life on Mars	7
Time-Integrative Multibiomarker Detection in Triassic–Jurassic Rocks from the Atacama Desert: Relevance to the Search for Basic Life Beyond Earth	7
The Thermal Behavior of Ice-Bearing Ground: The Highest Cold, Dry Desert on Earth as an Analog for Conditions on Mars, at Ojos del Salado, Puna de Atacama-Altiplano Region	7
Scientific Targets of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments at the Japanese Experiment Module Exposed Facility of the International Space Station	6
Reactivation of Microbial Strains and Synthetic Communities After a Spaceflight to the International Space Station: Corroborating the Feasibility of Essential Conversions in the MELiSSA Loop	6

UV Transmission in Natural Waters on Prebiotic Earth	6
Resolving the History of Life on Earth by Seeking Life As We Know It on Mars	6
Infrared Spectroscopic Detection of Biosignatures at Lake Tírez, Spain: Implications for Mars	6
Dimerization of Uracil in a Simulated Mars-like UV Radiation Environment	6
Subsurface In Situ Detection of Microbes and Diverse Organic Matter Hotspots in the Greenland Ice Sheet	6
Highly Siderophile Elements and Coupled Fe-Os Isotope Signatures in the Temagami Iron Formation, Canada: Possible Signatures of Neoarchean Seawater Chemistry and Earth's Oxygenation History	6
Sulfur Chemistry May Have Paved the Way for Evolution of Antioxidants	6
Acid Mine Drainage as Energizing Microbial Niches for the Formation of Iron Stromatolites: The Tintillo River in Southwest Spain	6
Assessment of Automated Nucleic Acid Extraction Systems in Combination with MinION Sequencing As Potential Tools for the Detection of Microbial Biosignatures	6
Photochemical Synthesis of Ammonia and Amino Acids from Nitrous Oxide	6
Time-Sensitive Aspects of Mars Sample Return (MSR) Science	6
Spaceflight Virology: What Do We Know about Viral Threats in the Spaceflight Environment?	6
Inefficient Water Degassing Inhibits Ocean Formation on Rocky Planets: An Insight from Self-Consistent Mantle Degassing Models	6
0.25 Ga Salt Deposits Preserve Signatures of Habitable Conditions and Ancient Lipids	6
Persistence of Technosignatures: A Comment on Lingam and Loeb	6
Interactions Between Iron Sulfide Minerals and Organic Carbon: Implications for Biosignature Preservation and Detection	5
Space Exposure of Amino Acids and Their Precursors during the Tanpopo Mission	5
Scientific Value of Including an Atmospheric Sample as Part of Mars Sample Return (MSR)	5
Ultraviolet-Driven Deamination of Cytidine Ribonucleotides Under Planetary Conditions	5
Comparisons of Transcriptome Profiles from Bacillus subtilis Cells Grown in Space versus High Aspect Ratio Vessel (HARV) Clinostats Reveal a Low Degree of Concordance	5
The Bioburden and Ionic Composition of Hypersaline Lake Ices: Novel Habitats on Earth and Their Astrobiological Implications	5
Planning Implications Related to Sterilization-Sensitive Science Investigations Associated with Mars Sample Return (MSR)	5
Science Autonomy for Ocean Worlds Astrobiology: A Perspective	5
Science and Curation Considerations for the Design of a Mars Sample Return (MSR) Sample Receiving Facility (SRF)	5
Influence of Calcium Perchlorate on the Search for Martian Organic Compounds with MTBSTFA/DMF Derivatization	5
Characterizing the Mineral Assemblages of Hot Spring Environments and Applications to Mars Orbital Data	5
Biological Soil Crusts as Modern Analogs for the Archean Continental Biosphere: Insights from Carbon and Nitrogen Isotopes	5
BioSentinel: A Biofluidic Nanosatellite Monitoring Microbial Growth and Activity in Deep Space	5
Radiolytic Degradation of Soil Carbon from the Mojave Desert by 60Co Gamma Rays: Implications for the Survival of Martian Organic Compounds Due to Cosmic Radiation	5
Planetary Protection Implementation and Verification Approach for the Mars 2020 Mission	5
Plastic Silica Conglomerate with an Extremophile Microbial Matrix in a Hot-Water Stream Paleoenvironment	5
Perchlorate Salts Exert a Dominant, Deleterious Effect on the Structure, Stability, and Activity of α-Chymotrypsin	5
The Biological Study of Lifeless Worlds and Environments	5
The ScanMars Subsurface Radar Sounding Experiment on AMADEE-18	5
High pCO2 Reduces Sensitivity to CO2 Perturbations on Temperate, Earth-like Planets Throughout Most of Habitable Zone	5
Spectropolarimetry of Primitive Phototrophs as Global Surface Biosignatures	5
Accuracy of Thermodynamic Databases for Hydroxyapatite Dissolution Constant	5
The Scientific Importance of Returning Airfall Dust as a Part of Mars Sample Return (MSR)	4
Natural Radioactive Environments as Sources of Local Disequilibrium for the Emergence of Life	4
Minimum Units of Habitability and Their Abundance in the Universe	4
Unique and Potentially Mars-Relevant Flow Regime and Water Sources at a High Andes-Atacama Site	4
Pyrolysis of Carboxylic Acids in the Presence of Iron Oxides: Implications for Life Detection on Missions to Mars	4
Radiolytic Destruction of Uracil in Interstellar and Solar System Ices	4
Microfluidics Microbial Activity MicroAssay: An Automated In Situ Microbial Metabolic Detection System	4
Biosignatures Associated with Organic Matter in Late Paleoproterozoic Stromatolitic Dolomite and Implications for Martian Carbonates	4
Degradation of Amino Acids on Mars by UV Irradiation in the Presence of Chloride and Oxychlorine Salts	4
Toward Detecting Biosignatures of DNA, Lipids, and Metabolic Intermediates from Bacteria in Ice Grains Emitted by Enceladus and Europa	4
Multiwavelength Ablation/Ionization and Mass Spectrometric Analysis of 1.88 Ga Gunflint Chert	4
Team Processes and Outcomes During the AMADEE-18 Mars Analog Mission	4
Artificial Maturation of Iron- and Sulfur-Rich Mars Analogues: Implications for the Diagenetic Stability of Biopolymers and Their Detection with Pyrolysis–Gas Chromatography–Mass Spectrometry	4
The Role of Minerals in Events That Led to the Origin of Life	4
Deoxyribonucleic Acid Extraction from Mars Analog Soils and Their Characterization with Solid-State Nanopores	4
In Situ Identification of Paleoarchean Biosignatures Using Colocated Perseverance Rover Analyses: Perspectives for In Situ Mars Science and Sample Return	4
Survey and Evaluation of Spacecraft-Associated Aluminum-Degrading Microbes and Their Rapid Identification Methods	4
The Radiation Environment of Ceres and Implications for Surface Sampling	4
Out of Thin Air? Astrobiology and Atmospheric Chemotrophy	4
Is a Linear or a Walkabout Protocol More Efficient When Using a Rover to Choose Biologically Relevant Samples in a Small Region of Interest?	4
Detection of Potential Lipid Biomarkers in Oxidative Environments by Raman Spectroscopy and Implications for the ExoMars 2020-Raman Laser Spectrometer Instrument Performance	4
Tardigrade Survival Limits in High-Speed Impacts—Implications for Panspermia and Collection of Samples from Plumes Emitted by Ice Worlds	4
Hot Spring Microbial Community Elemental Composition: Hot Spring and Soil Inputs, and the Transition from Biocumulus to Siliceous Sinter	4
COSPAR Sample Safety Assessment Framework (SSAF)	4
Salt Tolerance and UV Protection of Bacillus subtilis and Enterococcus faecalis under Simulated Martian Conditions	4
A Deep Ultraviolet Raman and Fluorescence Spectral Library of 51 Organic Compounds for the SHERLOC Instrument Onboard Mars 2020	4
Do Soluble Phosphates Direct the Formose Reaction towards Pentose Sugars?	4
Integrated Molar Absorptivity of Mid- and Far-Infrared Spectra of Glycine and Other Selected Amino Acids	4
Urability: A Property of Planetary Bodies That Can Support an Origin of Life	4
A Review of the “Black Beauty” Martian Regolith Breccia and Its Martian Habitability Record	3
Transfer of Rocks Between Planetary Systems: Panspermia Revisited	3
Planetary Mapping Using Deep Learning: A Method to Evaluate Feature Identification Confidence Applied to Habitats in Mars-Analog Terrain	3
Mars-Analog Calcium Sulfate Veins Record Evidence of Ancient Subsurface Life	3
AMADEE-18 and the Analog Mission Performance Metrics Analysis: A Benchmarking Tool for Mission Planning and Evaluation	3
Color Catalogue of Life in Ice: Surface Biosignatures on Icy Worlds	3
Martian Magmatic Clay Minerals Forming Vesicles: Perfect Niches for Emerging Life?	3
Microbial Protocols for Spacecraft: 1. Effects of Surface Texture, Low Pressure, and UV Irradiation on Recovery of Microorganisms from Surfaces	3
Deep-UV Raman Spectroscopy of Carbonaceous Precambrian Microfossils: Insights into the Search for Past Life on Mars	3
Seeding Biochemistry on Other Worlds: Enceladus as a Case Study	3
Structural and Energetic Compatibility: The Driving Principles of Molecular Evolution	3
Growth of Non-Halophilic Bacteria in the Sodium–Magnesium–Sulfate–Chloride Ion System: Unravelling the Complexities of Ion Interactions in Terrestrial and Extraterrestrial Aqueous Environments	3
The Molecular Record of Metabolic Activity in the Subsurface of the Río Tinto Mars Analog	3
A Proposed Geobiology-Driven Nomenclature for AstrobiologicalIn SituObservations and Sample Analyses	3
Preservation and Distributions of Covalently Bound Polyaromatic Hydrocarbons in Ancient Biogenic Kerogens and Insoluble Organic Macromolecules	3
Study of Ferrocyanide Adsorption onto Different Minerals as Prebiotic Chemistry Assays	3
Microbial Protocols for Spacecraft: 3. Spore Monolayer Preparation Methods for Ultraviolet Irradiation Exposures	3
Quantifying Preservation Potential: Lipid Degradation in a Mars-Analog Circumneutral Iron Deposit	3
Theoretical Constraints Imposed by Gradient Detection and Dispersal on Microbial Size in Astrobiological Environments	3
Biogeographical Modeling of Alien Worlds	3
Study of the Stability of Gly·MgSO4·5H2O under Simulated Martian Conditions by In Situ Raman Spectroscopy	3
ExoMars Mars Organic Molecule Analyzer (MOMA) Laser Desorption/Ionization Mass Spectrometry (LDI-MS) Analysis of Phototrophic Communities from a Silica-Depositing Hot Spring in Yellowstone National Pa	3
Theoretical Investigation into a Possibility of Formation of Propylene Oxide Homochirality in Space	3
Persistence of Habitable, but Uninhabited, Aqueous Solutions and the Application to Extraterrestrial Environments	3
Four-Year Operation of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments on the JEM Exposed Facility of the International Space Station	3
Planetary Protection Assessment of Radioisotope Thermoelectric Generator (RTG)–Powered Landed Missions to Ocean Worlds: Application to Enceladus	3
On the Possibility of an Artificial Origin for ‘Oumuamua	3
Detecting Endogenous Microbial Metabolism and Differentiating Between Abiotic and Biotic Signals Observed by Bioelectrochemical Systems in Soils	3
Fuligo septicaSpores Onboard a Stratospheric NASA Balloon and Its CompleteIn VitroLife Cycle	3
The Origin of Life: What Is the Question?	3
AMADEE-18: Vision-Based Unmanned Aerial Vehicle Navigation for Analog Mars Mission (AVI-NAV)	3
The ‘Oumuamua Controversy: Bayesian Priors and the Evolution of Technological Intelligence	3
Hydrogen Production from Alteration of Chicxulub Crater Impact Breccias: Potential Energy Source for a Subsurface Microbial Ecosystem	3
Different Is More: The Value of Finding an Inhabited Planet That Is Far from Earth2.0	3
Testing Abiotic Reduction of NAD+ Directly Mediated by Iron/Sulfur Minerals	3
Endolithic Microbial Carbon Cycling in East Antarctica	3
Mineral Matrix Effects on Pyrolysis Products of Kerogens Infer Difficulties in Determining Biological Provenance of Macromolecular Organic Matter at Mars	3
Stable Isotope Fractionation in a Cold Spring System, Utah, USA: Insights for Sample Selection on Mars	3
Optimizing Chiral Selectivity in Practical Life-Detection Instruments	3
Duplex Formation and the Origins of Homochirality	3