Biogeochemical Cycles & Geobiology
Posted inAstrogeology, Away Teams & Field Reports, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Sample Return, Status Report

Lipid Biomarkers Reveal Dominance Of Aerobic Methanotrophy In A Continental Serpentinizing System

by Keith Cowing

Sources and sinks of methane within an advanced serpentinization-influenced system were investigated at the Coast Range Ophiolite Microbial Observatory (CROMO) in Lower Lake, California. Subsurface water-rock reactions at CROMO contribute […]

Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Icy Worlds, Status Report, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography

Climate And Ocean Circulation Changes Toward A Modern Snowball Earth

by Keith Cowing

It has been hypothesized that the Earth may have experienced snowball events in the past, during which its surface became completely covered with ice. Previous studies used general circulation models […]

Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Genomics, Proteomics, Bioinformatics, Life Support Systems, Meteorites & Asteroids, Status Report

Quantifying Building Blocks of Life in Planetary Analog Materials: Implications for Prebiotic Chemistry and Biosignature Identification

by Keith Cowing

Building blocks of life such as amino acids, nucleobases, and fatty acids are central to prebiotic chemistry and represent key targets in the search for planetary biosignatures. In planetary materials, […]

Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Meteorites & Asteroids, Missions & Hardware, Planetary Protection & Biosafety, Sample Return, Status Report

Tianwen-2 Target Asteroid (469219) Kamo’oalewa Probably Develops An Itokawa-compositional But Ultra-highly Space-weathered Surface

by Keith Cowing

China’s Tianwen-2 mission plans to return samples from a small, rapidly spinning Earth quasi-satellite (469219) Kamo’oalewa. Previous studies linked Kamo’oalewa to lunar composition and origin.

Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Fossils & Paleontology, Habitable Zones, Impact events, Meteorites & Asteroids, Origin & Evolution of Life, Press Release

Did Impacts From Meteors Help Start Life On Earth?

by Keith Cowing

Meteor impacts may have helped spark life on Earth, creating hot, chemical-rich environments where the first living cells could take shape, according to research integrated by a recent Rutgers University […]

Posted inAnalog Studies, Arctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Cryobiology, Habitable Zones, Icy Worlds, Mapping, Geodesy, Cartography, Bathymetry, Origin & Evolution of Life, Status Report, Water/Hycean Worlds & Oceanography

Interaction Between Vegetation And Snowball Phases In The Late Proterozoic Earth

by Keith Cowing

Between 2.4 and 0.6 Gy ago, our planet underwent several episodes of global glaciations, including the Snowball Earth case that ended 635 My ago.

Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Europa, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Jupiter, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Origin & Evolution of Life, Status Report, Tricorders & Sensors, Water/Hycean Worlds & Oceanography

Biomarkers on the Icy Jovian Moons: Can Europa Also Provide Insights into Life’s Origin?

by Keith Cowing

Within the payloads of JUICE and Europa Clipper, there are instruments suitable for the search of specific biosignatures that can diagnose life tracks in two ways.

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