Astrobiology

Article	Citations
Oxygenation, Life, and the Planetary System during Earth's Middle History: An Overview	91
Oxia Planum: The Landing Site for the ExoMars “Rosalind Franklin” Rover Mission: Geological Context and Prelanding Interpretation	85
The Venusian Lower Atmosphere Haze as a Depot for Desiccated Microbial Life: A Proposed Life Cycle for Persistence of the Venusian Aerial Biosphere	70
The Role of Meteorite Impacts in the Origin of Life	67
Toward the RNA-World in the Interstellar Medium—Detection of Urea and Search of 2-Amino-oxazole and Simple Sugars	66
Mars Extant Life: What's Next? Conference Report	54
Fluvial Regimes, Morphometry, and Age of Jezero Crater Paleolake Inlet Valleys and Their Exobiological Significance for the 2020 Rover Mission Landing Site	48
Phosphine on Venus Cannot Be Explained by Conventional Processes	47
Venus, an Astrobiology Target	43
Discriminating Abiotic and Biotic Fingerprints of Amino Acids and Fatty Acids in Ice Grains Relevant to Ocean Worlds	41
Catalytic Synthesis of Polyribonucleic Acid on Prebiotic Rock Glasses	36
Morphological and Spectral Diversity of the Clay-Bearing Unit at the ExoMars Landing Site Oxia Planum	36
Elements for the Origin of Life on Land: A Deep-Time Perspective from the Pilbara Craton of Western Australia	35
Cometary Delivery of Hydrogen Cyanide to the Early Earth	32
Understanding Hypervelocity Sampling of Biosignatures in Space Missions	30
Water Activities of Acid Brine Lakes Approach the Limit for Life	29
Simulating Mars Drilling Mission for Searching for Life: Ground-Truthing Lipids and Other Complex Microbial Biomarkers in the Iron-Sulfur Rich Río Tinto Analog	29
Earth-like Habitable Environments in the Subsurface of Mars	28
A Reconstructed Subaerial Hot Spring Field in the ∼3.5 Billion-Year-Old Dresser Formation, North Pole Dome, Pilbara Craton, Western Australia	26
Potential for Phototrophy in Venus' Clouds	25
Magma Ocean Evolution of the TRAPPIST-1 Planets	24
The Timing of Evolutionary Transitions Suggests Intelligent Life is Rare	24
Science Objectives for Flagship-Class Mission Concepts for the Search for Evidence of Life at Enceladus	24
One-Pot Hydrogen Cyanide-Based Prebiotic Synthesis of Canonical Nucleobases and Glycine Initiated by High-Velocity Impacts on Early Earth	23
Lipid Biomarker Record of the Serpentinite-Hosted Ecosystem of the Samail Ophiolite, Oman and Implications for the Search for Biosignatures on Mars	23

BioSentinel: Long-Term Saccharomyces cerevisiae Preservation for a Deep Space Biosensor Mission	23
Phosphine Generation Pathways on Rocky Planets	23
Investigating Habitability with an Integrated Rock-Climbing Robot and Astrobiology Instrument Suite	22
Exobiology of the Venusian Clouds: New Insights into Habitability through Terrestrial Models and Methods of Detection	22
BioSentinel: A Biological CubeSat for Deep Space Exploration	22
Estimated Minimum Life Span of the Jezero Fluvial Delta (Mars)	21
Abiotic Synthesis of Nucleoside 5′-Triphosphates with Nickel Borate and Cyclic Trimetaphosphate (CTMP)	21
Lichen Vitality After a Space Flight on Board the EXPOSE-R2 Facility Outside the International Space Station: Results of the Biology and Mars Experiment	20
Effects of Desiccation and Freezing on Microbial Ionizing Radiation Survivability: Considerations for Mars Sample Return	20
Microbial Sulfur Isotope Fractionation in the Chicxulub Hydrothermal System	19
Fusarium oxysporumas an Opportunistic Fungal Pathogen onZinnia hybridaPlants Grown on board the International Space Station	19
When is Life a Viable Hypothesis? The Case of Venusian Phosphine	18
Timescales for Prebiotic Photochemistry Under Realistic Surface Ultraviolet Conditions	18
An Alternative Approach for Assessing Biogenicity	18
Biosignature Analysis of Mars Soil Analogs from the Atacama Desert: Challenges and Implications for Future Missions to Mars	18
Determining the “Biosignature Threshold” for Life Detection on Biotic, Abiotic, or Prebiotic Worlds	17
Large Mass-Independent Oxygen Isotope Fractionations in Mid-Proterozoic Sediments: Evidence for a Low-Oxygen Atmosphere?	17
Screening the Survival of Cyanobacteria Under Perchlorate Stress. Potential Implications for Mars In Situ Resource Utilization	17
Phosphorus in the Clouds of Venus: Potential for Bioavailability	17
Preliminary Planning for Mars Sample Return (MSR) Curation Activities in a Sample Receiving Facility (SRF)	17
Rapid Radiolytic Degradation of Amino Acids in the Martian Shallow Subsurface: Implications for the Search for Extinct Life	17
Final Report of the Mars Sample Return Science Planning Group 2 (MSPG2)	16
Bacterial Cellulose Retains Robustness but Its Synthesis Declines After Exposure to a Mars-like Environment Simulated Outside the International Space Station	16
Exo-Ocean Exploration with Deep-Sea Sensor and Platform Technologies	16
Metabolomics as an Emerging Tool in the Search for Astrobiologically Relevant Biomarkers	16
Space Radiation Dosimetry at the Exposure Facility of the International Space Station for the Tanpopo Mission	16
The Complex Molecules Detector (CMOLD): A Fluidic-Based Instrument Suite to Search for (Bio)chemical Complexity on Mars and Icy Moons	16
The Venus Life Equation	16
Mars Sample Return (MSR): Planning for Returned Sample Science	16
Cometary Glycolaldehyde as a Source of pre-RNA Molecules	16
Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres	16
Ice Shell Structure and Composition of Ocean Worlds: Insights from Accreted Ice on Earth	15
The Production and Potential Detection of Hexamethylenetetramine-Methanol in Space	15
The Albedo of Ryugu: Evidence for a High Organic Abundance, as Inferred from the Hayabusa2 Touchdown Maneuver	15
In Search for a Planet Better than Earth: Top Contenders for a Superhabitable World	15
Comprehensive Search of Stable Isomers of Alanine and Alanine Precursors in Prebiotic Syntheses	15
Assessment of Ammonia as a Biosignature Gas in Exoplanet Atmospheres	15
The Detection of Elemental Signatures of Microbes in Martian Mudstone Analogs Using High Spatial Resolution Laser Ablation Ionization Mass Spectrometry	15
Ancient Oil as a Source of Carbonaceous Matter in 1.88-Billion-Year-Old Gunflint Stromatolites and Microfossils	14
Synthesis of Phospholipids Under Plausible Prebiotic Conditions and Analogies with Phospholipid Biochemistry for Origin of Life Studies	14
Investigation of Venus Cloud Aerosol and Gas Composition Including Potential Biogenic Materials via an Aerosol-Sampling Instrument Package	14
Greenalite Nanoparticles in Alkaline Vent Plumes as Templates for the Origin of Life	13
Habitability Models for Astrobiology	13
Rationale and Proposed Design for a Mars Sample Return (MSR) Science Program	13
Toward Detecting Biosignatures of DNA, Lipids, and Metabolic Intermediates from Bacteria in Ice Grains Emitted by Enceladus and Europa	13
Detection of Biosignatures by Capillary Electrophoresis Mass Spectrometry in the Presence of Salts Relevant to Ocean Worlds Missions	12
Mass Spectrometric Fingerprints of Bacteria and Archaea for Life Detection on Icy Moons	12
Planetary Protection Implementation on the Interior Exploration Using Seismic Investigations, Geodesy and Heat Transport Mission	12
Atmospheric Nitrogen When Life Evolved on Earth	12
Bacterial Diversity of a High-Altitude Permafrost Thaw Pond Located on Ojos del Salado (Dry Andes, Altiplano-Atacama Region)	12

ExoMars Raman Laser Spectrometer: A Tool to Semiquantify the Serpentinization Degree of Olivine-Rich Rocks on Mars	12
Microbially Induced Sedimentary Structures in Clastic Deposits: Implication for the Prospection for Fossil Life on Mars	12
Revival of Anhydrobiotic Cyanobacterium Biofilms Exposed to Space Vacuum and Prolonged Dryness: Implications for Future Missions beyond Low Earth Orbit	12
Observational Constraints on the Great Filter	11
Relevance of the Unfolded Protein Response to Spaceflight-Induced Transcriptional Reprogramming in Arabidopsis	11
Influence of Calcium Perchlorate on the Search for Organics on Mars with Tetramethylammonium Hydroxide Thermochemolysis	11
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	11
BioSentinel: A Biofluidic Nanosatellite Monitoring Microbial Growth and Activity in Deep Space	11
Spaceflight Virology: What Do We Know about Viral Threats in the Spaceflight Environment?	11
Detection and Degradation of Adenosine Monophosphate in Perchlorate-Spiked Martian Regolith Analog, by Deep-Ultraviolet Spectroscopy	11
Are Impact Craters and Extinction Episodes Periodic? Implications for Planetary Science and Astrobiology	11
Uninhabitable and Potentially Habitable Environments on Mars: Evidence from Meteorite ALH 84001	11
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	10
The AMADEE-18 Mars Analog Expedition in the Dhofar Region of Oman	10
Nitrogen Fixation at Early Mars	10
A Cruise-Phase Microbial Survival Model for Calculating Bioburden Reductions on Past or Future Spacecraft Throughout Their Missions with Application to Europa Clipper	10
Do Soluble Phosphates Direct the Formose Reaction towards Pentose Sugars?	10
The Italian National Project of Astrobiology—Life in Space—Origin, Presence, Persistence of Life in Space, from Molecules to Extremophiles	10
Sulfur Chemistry May Have Paved the Way for Evolution of Antioxidants	10
Evaluating Biosignatures for Life Detection	10
Time-Sensitive Aspects of Mars Sample Return (MSR) Science	10
Interrelationships in the Gypsum–Syngenite–Görgeyite System and Their Possible Formation on Mars	9
Extraction and Separation of Chiral Amino Acids for Life Detection on Ocean Worlds Without Using Organic Solvents or Derivatization	9
Bacterial Growth in Brines Formed by the Deliquescence of Salts Relevant to Cold Arid Worlds	9
Scientific Value of Including an Atmospheric Sample as Part of Mars Sample Return (MSR)	9
Biologically Available Chemical Energy in the Temperate but Uninhabitable Venusian Cloud Layer: What Do We Want to Know?	9
Four-Year Operation of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments on the JEM Exposed Facility of the International Space Station	9
Photochemical Synthesis of Ammonia and Amino Acids from Nitrous Oxide	9
Time-Integrative Multibiomarker Detection in Triassic–Jurassic Rocks from the Atacama Desert: Relevance to the Search for Basic Life Beyond Earth	9
Microbial Protocols for Spacecraft: 3. Spore Monolayer Preparation Methods for Ultraviolet Irradiation Exposures	9
Urability: A Property of Planetary Bodies That Can Support an Origin of Life	9
A Drake Equation for Alien Artifacts	9
Laboratory Analysis of Returned Samples from the AMADEE-18 Mars Analog Mission	9
Cold, Dry, Windy, and UV Irradiated: Surveying Mars-Relevant Conditions in Ojos del Salado Volcano (Andes Mountains, Chile)	9
Inefficient Water Degassing Inhibits Ocean Formation on Rocky Planets: An Insight from Self-Consistent Mantle Degassing Models	9
Fatty Acid Preservation in Modern and Relict Hot-Spring Deposits in Iceland, with Implications for Organics Detection on Mars	9
A Deep Ultraviolet Raman and Fluorescence Spectral Library of 51 Organic Compounds for the SHERLOC Instrument Onboard Mars 2020	8
Biosignatures Associated with Organic Matter in Late Paleoproterozoic Stromatolitic Dolomite and Implications for Martian Carbonates	8
Assessment of Automated Nucleic Acid Extraction Systems in Combination with MinION Sequencing As Potential Tools for the Detection of Microbial Biosignatures	8
Science Autonomy for Ocean Worlds Astrobiology: A Perspective	8
An Overview of Lipid Biomarkers in Terrestrial Extreme Environments with Relevance for Mars Exploration	8
Effects of Active Volcanism on Bacterial Communities in the Highest-Altitude Crater Lake of Ojos del Salado (Dry Andes, Altiplano-Atacama Region)	8
Spectropolarimetry of Primitive Phototrophs as Global Surface Biosignatures	8
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	8
UV Transmission in Natural Waters on Prebiotic Earth	8
Seeding Biochemistry on Other Worlds: Enceladus as a Case Study	8
Molecular Muscle Experiment: Hardware and Operational Lessons for Future Astrobiology Space Experiments	8
Impact of UV Radiation on the Raman Signal of Cystine: Implications for the Detection of S-rich Organics on Mars	8
Scientific Targets of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments at the Japanese Experiment Module Exposed Facility of the International Space Station	8
0.25 Ga Salt Deposits Preserve Signatures of Habitable Conditions and Ancient Lipids	7
The Radiation Stability of Thymine in Solid H2O	7
Planning Implications Related to Sterilization-Sensitive Science Investigations Associated with Mars Sample Return (MSR)	7
Planetary Protection Implementation and Verification Approach for the Mars 2020 Mission	7
Science and Curation Considerations for the Design of a Mars Sample Return (MSR) Sample Receiving Facility (SRF)	7
Resolving the History of Life on Earth by Seeking Life As We Know It on Mars	7
Degradation of Amino Acids on Mars by UV Irradiation in the Presence of Chloride and Oxychlorine Salts	7
Dimerization of Uracil in a Simulated Mars-like UV Radiation Environment	7
Deoxyribonucleic Acid Extraction from Mars Analog Soils and Their Characterization with Solid-State Nanopores	7
In Situ Identification of Paleoarchean Biosignatures Using Colocated Perseverance Rover Analyses: Perspectives for In Situ Mars Science and Sample Return	7
Surface and Oceanic Habitability of Trappist-1 Planets under the Impact of Flares	7
Microfluidics Microbial Activity MicroAssay: An Automated In Situ Microbial Metabolic Detection System	7
Prokaryotic Diversity and Metabolically Active Communities in Brines from Two Perennially Ice-Covered Antarctic Lakes	7
Subsurface In Situ Detection of Microbes and Diverse Organic Matter Hotspots in the Greenland Ice Sheet	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
Martian Magmatic Clay Minerals Forming Vesicles: Perfect Niches for Emerging Life?	6
Integrated Molar Absorptivity of Mid- and Far-Infrared Spectra of Glycine and Other Selected Amino Acids	6
Minimum Units of Habitability and Their Abundance in the Universe	6
Space Exposure of Amino Acids and Their Precursors during the Tanpopo Mission	6
Perchlorate Salts Exert a Dominant, Deleterious Effect on the Structure, Stability, and Activity of α-Chymotrypsin	6
COSPAR Sample Safety Assessment Framework (SSAF)	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
The Radiation Environment of Ceres and Implications for Surface Sampling	6
Acid Mine Drainage as Energizing Microbial Niches for the Formation of Iron Stromatolites: The Tintillo River in Southwest Spain	6
Out of Thin Air? Astrobiology and Atmospheric Chemotrophy	6
A Proposed Geobiology-Driven Nomenclature for AstrobiologicalIn SituObservations and Sample Analyses	6
Influence of Calcium Perchlorate on the Search for Martian Organic Compounds with MTBSTFA/DMF Derivatization	6
The Origin of Life: What Is the Question?	6
Ultraviolet-Driven Deamination of Cytidine Ribonucleotides Under Planetary Conditions	6
Mineral Matrix Effects on Pyrolysis Products of Kerogens Infer Difficulties in Determining Biological Provenance of Macromolecular Organic Matter at Mars	6
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	6

Tardigrade Survival Limits in High-Speed Impacts—Implications for Panspermia and Collection of Samples from Plumes Emitted by Ice Worlds	6
A Review of the “Black Beauty” Martian Regolith Breccia and Its Martian Habitability Record	6
Hot Spring Microbial Community Elemental Composition: Hot Spring and Soil Inputs, and the Transition from Biocumulus to Siliceous Sinter	6
Salt Tolerance and UV Protection of Bacillus subtilis and Enterococcus faecalis under Simulated Martian Conditions	6
Testing Abiotic Reduction of NAD+ Directly Mediated by Iron/Sulfur Minerals	6
Preservation and Distributions of Covalently Bound Polyaromatic Hydrocarbons in Ancient Biogenic Kerogens and Insoluble Organic Macromolecules	5
Microbial Protocols for Spacecraft: 1. Effects of Surface Texture, Low Pressure, and UV Irradiation on Recovery of Microorganisms from Surfaces	5
The ScanMars Subsurface Radar Sounding Experiment on AMADEE-18	5
Biogenicity of Spicular Geyserite from Te Kopia, New Zealand: Integrated Petrography, High-Resolution Hyperspectral and Elemental Analysis	5
Theoretical Investigation into a Possibility of Formation of Propylene Oxide Homochirality in Space	5
The Biological Study of Lifeless Worlds and Environments	5
Comparisons of Transcriptome Profiles fromBacillus subtilisCells Grown in Space versus High Aspect Ratio Vessel (HARV) Clinostats Reveal a Low Degree of Concordance	5
Radiolytic Degradation of Soil Carbon from the Mojave Desert by60Co Gamma Rays: Implications for the Survival of Martian Organic Compounds Due to Cosmic Radiation	5
On the Possibility of an Artificial Origin for ‘Oumuamua	5
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	5
Pyrolysis of Carboxylic Acids in the Presence of Iron Oxides: Implications for Life Detection on Missions to Mars	5
AMADEE-18: Vision-Based Unmanned Aerial Vehicle Navigation for Analog Mars Mission (AVI-NAV)	5
Hydrogen Production from Alteration of Chicxulub Crater Impact Breccias: Potential Energy Source for a Subsurface Microbial Ecosystem	5
Biosignatures Preserved in Carbonate Nodules from the Western Qaidam Basin, NW China: Implications for Life Detection on Mars	5
Duplex Formation and the Origins of Homochirality	5
Transfer of Rocks Between Planetary Systems: Panspermia Revisited	5
Some Pertinent Issues for Interstellar Panspermia Raised after the Discovery of 1I/‘Oumuamua	5
Biological Soil Crusts as Modern Analogs for the Archean Continental Biosphere: Insights from Carbon and Nitrogen Isotopes	5
Interactions Between Iron Sulfide Minerals and Organic Carbon: Implications for Biosignature Preservation and Detection	5
High pCO2Reduces Sensitivity to CO2Perturbations on Temperate, Earth-like Planets Throughout Most of Habitable Zone	5
The Scientific Importance of Returning Airfall Dust as a Part of Mars Sample Return (MSR)	5
The Molecular Record of Metabolic Activity in the Subsurface of the Río Tinto Mars Analog	5
The Bioburden and Ionic Composition of Hypersaline Lake Ices: Novel Habitats on Earth and Their Astrobiological Implications	5
Team Processes and Outcomes During the AMADEE-18 Mars Analog Mission	4
The Atacama Rover Astrobiology Drilling Studies (ARADS) Project	4
Extremophiles in Earth's Deep Seas: A View Toward Life in Exo-Oceans	4
Quantifying Preservation Potential: Lipid Degradation in a Mars-Analog Circumneutral Iron Deposit	4
Radiolytic Destruction of Uracil in Interstellar and Solar System Ices	4
Characterization of the Halochromic Gloeocapsin Pigment, a Cyanobacterial Biosignature for Paleobiology and Astrobiology	4
Theoretical Constraints Imposed by Gradient Detection and Dispersal on Microbial Size in Astrobiological Environments	4
Infrared Spectral Intensities of Amine Ices, Precursors to Amino Acids	4
Habitability and Biosignature Formation in Simulated Martian Aqueous Environments	4
Natural Radioactive Environments as Sources of Local Disequilibrium for the Emergence of Life	4
Multiwavelength Ablation/Ionization and Mass Spectrometric Analysis of 1.88 Ga Gunflint Chert	4
Unique and Potentially Mars-Relevant Flow Regime and Water Sources at a High Andes-Atacama Site	4
Life Detection and Microbial Biomarker Profiling with Signs of Life Detector-Life Detector Chip During a Mars Drilling Simulation Campaign in the Hyperarid Core of the Atacama Desert	4
Color Catalogue of Life in Ice: Surface Biosignatures on Icy Worlds	4
Life on Mars: Independent Genesis or Common Ancestor?	4
Deep-UV Raman Spectroscopy of Carbonaceous Precambrian Microfossils: Insights into the Search for Past Life on Mars	4
Exploring the Lipid World Hypothesis: A Novel Scenario of Self-Sustained Darwinian Evolution of the Liposomes	4
Diagnosing an Opportunistic Fungal Pathogen on Spaceflight-Grown Plants Using the MinION Sequencing Platform	4
Mutation Analysis of therpoBGene in the Radiation-Resistant BacteriumDeinococcus radioduransR1 Exposed to Space during the Tanpopo Experiment at the International Space Station	4
Nitrogen Cycling and Biosignatures in a Hyperarid Mars Analog Environment	4
Venus' Atmospheric Chemistry and Cloud Characteristics Are Compatible with Venusian Life	4
The Role of Minerals in Events That Led to the Origin of Life	4
Signatures of Life Detected in Images of Rocks Using Neural Network Analysis Demonstrate New Potential for Searching for Biosignatures on the Surface of Mars	4
UV Time-Resolved Laser-Induced Fluorescence Spectroscopy of Amino Acids Found in Meteorites: Implications for Space Science and Exploration	4
Introducing the Venus Collection—Papers from the First Workshop on Habitability of the Cloud Layer	4
Chemical, Thermal, and Radiation Resistance of an Iron Porphyrin: A Model Study of Biosignature Stability	4
Survey and Evaluation of Spacecraft-Associated Aluminum-Degrading Microbes and Their Rapid Identification Methods	4
Endolithic Microbial Carbon Cycling in East Antarctica	4
Selection and Analytical Performances of the Dragonfly Mass Spectrometer Gas Chromatographic Columns to Support the Search for Organic Molecules of Astrobiological Interest on Titan	4
Planetary Protection Assessment of Radioisotope Thermoelectric Generator (RTG)–Powered Landed Missions to Ocean Worlds: Application to Enceladus	4
The Growth and Sporulation of Bacillus subtilis in Nanotesla Magnetic Fields	3
The Emergence of Astrobiology: A Topic-Modeling Perspective	3
Microbial Characterization of Arctic Glacial Ice Cores with a Semiautomated Life Detection System	3
Study of the Stability of Gly·MgSO4·5H2O under Simulated Martian Conditions by In Situ Raman Spectroscopy	3
Viability of Bacillus subtilis Spores Exposed to Ultraviolet Light at Ocean World Surface Temperatures	3
Metagenome-Assembled Genomes from Monte Cristo Cave (Diamantina, Brazil) Reveal Prokaryotic Lineages As Functional Models for Life on Mars	3
BioSentinel: Validating Sensitivity of Yeast Biosensors to Deep Space Relevant Radiation	3
Raman Characterization of the CanMars Rover Field Campaign Samples Using the Raman Laser Spectrometer ExoMars Simulator: Implications for Mars and Planetary Exploration	3
A Transiently Hypersaline Microbial Mat Harbors a Diverse and Stable Archaeal Community in the Cuatro Cienegas Basin, Mexico	3
Earth to Mars: A Protocol for Characterizing Permafrost in the Context of Climate Change as an Analog for Extraplanetary Exploration	3
Is There Such a Thing as a Biosignature?	3
In Situ Real-Time Monitoring for Aseptic Drilling: Lessons Learned from the Atacama Rover Astrobiology Drilling Studies Contamination Control Strategy and Implementation and Application to the	3
Experimental Investigation of the Formation of Formaldehyde by Hadean and Noachian Impacts	3
The Impact of Molecular Oxygen on Anion Composition in a Hazy Archean Earth Atmosphere	3
Growth on Carbohydrates from Carbonaceous Meteorites Alters the Immunogenicity of Environment-Derived Bacterial Pathogens	3
Biogeographical Modeling of Alien Worlds	3
Dispersion of Bacteria by Low-Pressure Boiling: Life Detection in Enceladus' Plume Material	3
Mars-Analog Calcium Sulfate Veins Record Evidence of Ancient Subsurface Life	3
Large Interferometer for Exoplanets: VIII. Where Is the Phosphine? Observing Exoplanetary PH3 with a Space-Based Mid-Infrared Nulling Interferometer	3
Spectral Detection of Nanophase Iron Minerals Produced by Fe(III)-Reducing Hyperthermophilic Crenarchaea	3
3D Printed Minerals as Astrobiology Analogs of Hydrothermal Vent Chimneys	3
Persistence of Habitable, but Uninhabited, Aqueous Solutions and the Application to Extraterrestrial Environments	3
Optimizing Chiral Selectivity in Practical Life-Detection Instruments	3
Microfluidic Chromatography for Enhanced Amino Acid Detection at Ocean Worlds	3
Planetary Minerals Catalyze Conversion of a Polycyclic Aromatic Hydrocarbon to a Prebiotic Quinone: Implications for Origins of Life	3
The Call for a New Definition of Biosignature	3
Planetary Mapping Using Deep Learning: A Method to Evaluate Feature Identification Confidence Applied to Habitats in Mars-Analog Terrain	3
Study of Ferrocyanide Adsorption onto Different Minerals as Prebiotic Chemistry Assays	3
The ‘Oumuamua Controversy: Bayesian Priors and the Evolution of Technological Intelligence	3
AMADEE-18 and the Analog Mission Performance Metrics Analysis: A Benchmarking Tool for Mission Planning and Evaluation	3
Respiration Measurements of Individual Tardigrades of the Species Richtersius cf coronifer as a Function of Temperature and Salinity and Termination of Anhydrobiosis	3
Mars Rover Techniques and Lower/Middle Cambrian Microbialites from South Australia: Construction, Biofacies, and Biogeochemistry	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
Stable Isotope Fractionation in a Cold Spring System, Utah, USA: Insights for Sample Selection on Mars	3
The Raman Active Vibrational Modes of Anthraquinones	3
A Short History of Panspermia from Antiquity Through the Mid-1970s	3