NASA Astrobiology

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Emerging Trends in Comet Taxonomy. “Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus

Cycles of Glaciation on Ancient Mars. “Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.

Methane Muted: How Did Early Earth Stay Warm?. “A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS

Emerging Trends in Comet Taxonomy“Emerging trends and a comet taxonomy based on the volatile chemistry measured in thirty comets with high-resolution infrared spectroscopy between 1997 and 2013.” in Icarus01/03

Cycles of Glaciation on Ancient Mars“Climate Cycling on Early Mars Caused by the Carbonate-Silicate Cycle” in Earth and Planetary Astrophysics.02/03

Methane Muted: How Did Early Earth Stay Warm?“A proper accounting of biogeochemical cycles in the oceans reveals that methane has a much more powerful foe than oxygen.” in PNAS03/03

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July 2021Behavior of the Mo, Tl, and U isotope systems during differentiation in the Kilauea Iki lava lake

Gaschnig, R. M., Rader, S. T., Reinhard, C. T., Owens, J. D., Planavsky, N., Wang, X., … Helz, R. (2021). Behavior of the Mo, Tl, and U isotope systems during differentiation in the Kilauea Iki lava lake. Chemical Geology, 574, 120239. doi:10.1016/j.chemgeo.2021.120239

May 2021Concepts for future missions to search for technosignatures

Socas-Navarro, H., Haqq-Misra, J., Wright, J. T., Kopparapu, R., Benford, J., & Davis, R. (2021). Concepts for future missions to search for technosignatures. Acta Astronautica, 182, 446–453. doi:10.1016/j.actaastro.2021.02.029

Windblown Hadean zircons derived by erosion of impact-generated 3.3 Ga uplifts, Barberton Greenstone Belt, South Africa

Lowe, D. R., Drabon, N., Byerly, G. R., & Byerly, B. L. (2021). Windblown Hadean zircons derived by erosion of impact-generated 3.3 Ga uplifts, Barberton Greenstone Belt, South Africa. Precambrian Research, 356, 106111. doi:10.1016/j.precamres.2021.106111

April 2021Effect of tectonic processes on biosphere–geosphere feedbacks across a convergent margin

Fullerton, K. M., Schrenk, M. O., Yücel, M., Manini, E., Basili, M., Rogers, T. J., … Lloyd, K. G. (2021). Effect of tectonic processes on biosphere–geosphere feedbacks across a convergent margin. Nature Geoscience. doi:10.1038/s41561-021-00725-0

Discovery of primitive CO2-bearing fluid in an aqueously altered carbonaceous chondrite

Tsuchiyama, A., Miyake, A., Okuzumi, S., Kitayama, A., Kawano, J., Uesugi, K., … Zolensky, M. (2021). Discovery of primitive CO2-bearing fluid in an aqueously altered carbonaceous chondrite. Science Advances, 7(17), eabg9707. doi:10.1126/sciadv.abg9707

Kinetic Analysis Suggests Evolution of Ribosome Specificity in Modern Elongation Factor-Tus from ‘Generalist’ Ancestors

De Tarafder, A., Parajuli, N. P., Majumdar, S., Kaçar, B., & Sanyal, S. (2021). Kinetic Analysis Suggests Evolution of Ribosome Specificity in Modern Elongation Factor-Tus from ‘Generalist’ Ancestors. Molecular Biology and Evolution. doi:10.1093/molbev/msab114

Ferric iron triggers greenalite formation in simulated Archean seawater

Hinz, I. L., Nims, C., Theuer, S., Templeton, A. S., & Johnson, J. E. (2021). Ferric iron triggers greenalite formation in simulated Archean seawater. Geology. doi:10.1130/g48495.1

Oxygen False Positives on Habitable Zone Planets Around Sun‐Like Stars

Krissansen‐Totton, J., Fortney, J. J., Nimmo, F., & Wogan, N. (2021). Oxygen False Positives on Habitable Zone Planets Around Sun‐Like Stars. AGU Advances, 2(2), None. doi:10.1029/2020av000294

Preliminary exploration of molybdenum isotope fractionation during coprecipitation of molybdate with abiotic and microbial calcite

Chen, X., Romaniello, S. J., & Anbar, A. D. (2021). Preliminary exploration of molybdenum isotope fractionation during coprecipitation of molybdate with abiotic and microbial calcite. Chemical Geology, 566, 120102. doi:10.1016/j.chemgeo.2021.120102

Anaerobic 3-Methylhopanoid Production By An Acidophilic Phototrophic Purple Bacterium

Mayer, M., Parenteau, M. N., Kempher, M. L., Madigan, M. T., Jahnke, L. L., & Welander, P. V. (2021). Anaerobic 3-Methylhopanoid Production By An Acidophilic Phototrophic Purple Bacterium. None. doi:10.21203/rs.3.rs-390249/v1

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