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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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 2021Preliminary 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

March 2021A missing link in mid‐late Permian record of north‐eastern Pangea: a sedimentological evaluation of the Permian Belfast Harbour Evaporite Formation of County Antrim, Northern Ireland

Andeskie, A. S., & Benison, K. C. (2021). A missing link in mid‐late Permian record of north‐eastern Pangea: a sedimentological evaluation of the Permian Belfast Harbour Evaporite Formation of County Antrim, Northern Ireland. The Depositional Record. doi:10.1002/dep2.144

Carbon cycle inverse modeling suggests large changes in fractional organic burial are consistent with the carbon isotope record and may have contributed to the rise of oxygen

Krissansen‐Totton, J., Kipp, M. A., & Catling, D. C. (2021). Carbon cycle inverse modeling suggests large changes in fractional organic burial are consistent with the carbon isotope record and may have contributed to the rise of oxygen. Geobiology. doi:10.1111/gbi.12440

New multicellular marine macroalgae from the early Tonian of northwestern Canada

Maloney, K. M., Halverson, G. P., Schiffbauer, J. D., Xiao, S., Gibson, T. M., Lechte, M. A., … Laflamme, M. (2021). New multicellular marine macroalgae from the early Tonian of northwestern Canada. Geology. doi:10.1130/g48508.1

Isotopic evidence for the formation of the Moon in a canonical giant impact

Nielsen, S. G., Bekaert, D. V., & Auro, M. (2021). Isotopic evidence for the formation of the Moon in a canonical giant impact. Nature Communications, 12(1), None. doi:10.1038/s41467-021-22155-7

1I/‘Oumuamua as an N 2 ice fragment of an exo‐pluto surface II: Generation of N 2 ice fragments and the origin of ‘Oumuamua

Desch, S. J., & P Jackson, A. (2021). 1I/‘Oumuamua as an N 2 ice fragment of an exo‐pluto surface II: Generation of N 2 ice fragments and the origin of ‘Oumuamua. Journal of Geophysical Research: Planets. doi:10.1029/2020je006807

A pole-to-equator ocean overturning circulation on Enceladus

Lobo, A. H., Thompson, A. F., Vance, S. D., & Tharimena, S. (2021). A pole-to-equator ocean overturning circulation on Enceladus. Nature Geoscience. doi:10.1038/s41561-021-00706-3

Venus’ Mass Spectra Show Signs of Disequilibria in the Middle Clouds

Mogul, R., Limaye, S. S., Way, M. J., & Cordova, J. A. (2021). Venus’ Mass Spectra Show Signs of Disequilibria in the Middle Clouds. Geophysical Research Letters. doi:10.1029/2020gl091327

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