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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November 2019Theoretical study of formate, tartrate, tartronate, and glycolate production from 6-carbon trioxylate intermediate in the citric acid cycle

Khan, M., Kar, S., Wang, J., & Leszczynski, J. (2019). Theoretical study of formate, tartrate, tartronate, and glycolate production from 6-carbon trioxylate intermediate in the citric acid cycle. Journal of Molecular Modeling, 25(12), None. doi:10.1007/s00894-019-4240-z

A measurement of water vapour amid a largely quiescent environment on Europa

Paganini, L., Villanueva, G. L., Roth, L., Mandell, A. M., Hurford, T. A., Retherford, K. D., & Mumma, M. J. (2019). A measurement of water vapour amid a largely quiescent environment on Europa. Nature Astronomy. doi:10.1038/s41550-019-0933-6

Habitable Zone Boundaries for Circumbinary Planets

Cukier, W., Kopparapu, R. k., Kane, S. R., Welsh, W., Wolf, E., Kostov, V., & Haqq-Misra, J. (2019). Habitable Zone Boundaries for Circumbinary Planets. Publications of the Astronomical Society of the Pacific, 131(1006), 124402. doi:10.1088/1538-3873/ab50cb

Lower Triassic carbonate δ238U record demonstrates expanded ocean anoxia during Smithian Thermal Maximum and improved ventilation during Smithian-Spathian boundary cooling event

Zhao, H., Algeo, T. J., Liu, Y., Chen, Z-Q., Hu, Z., Zhang, L., & Li, Z. (2019). Lower Triassic carbonate δ238U record demonstrates expanded ocean anoxia during Smithian Thermal Maximum and improved ventilation during Smithian-Spathian boundary cooling event. Palaeogeography, Palaeoclimatology, Palaeoecology, None, 109393. doi:10.1016/j.palaeo.2019.109393

Minimal biomass deposition in banded iron formations inferred from organic matter and clay relationships

Dodd, M. S., Papineau, D., Pirajno, F., Wan, Y., & Karhu, J. A. (2019). Minimal biomass deposition in banded iron formations inferred from organic matter and clay relationships. Nature Communications, 10(1), None. doi:10.1038/s41467-019-12975-z

The Onset of Evolutionary Stalling and the Limit on the Power of Natural Selection to Improve a Cellular Module

Venkataram, S., Monasky, R., Sikaroodi, S. H., Kryazhimskiy, S., & Kaçar, B. (2019). The Onset of Evolutionary Stalling and the Limit on the Power of Natural Selection to Improve a Cellular Module. None. doi:10.1101/850644

The Search for Chiral Asymmetry as a Potential Biosignature in our Solar System

Glavin, D. P., Burton, A. S., Elsila, J. E., Aponte, J. C., & Dworkin, J. P. (2019). The Search for Chiral Asymmetry as a Potential Biosignature in our Solar System. Chemical Reviews. doi:10.1021/acs.chemrev.9b00474

October 2019A Unified Model for Hydrogen in the Earth and Moon: No one expects the Theia Contribution

Desch, S. J., & Robinson, K. L. (2019). A Unified Model for Hydrogen in the Earth and Moon: No one expects the Theia Contribution. Geochemistry. doi:10.1016/j.chemer.2019.125546

Relative Humidity on Mars: New Results from the Phoenix TECP Sensor

Fischer, E., Martínez, G. M., Rennó, N. O., Tamppari, L. K., & Zent, A. P. (2019). Relative Humidity on Mars: New Results from the Phoenix TECP Sensor. Journal of Geophysical Research: Planets. doi:10.1029/2019je006080

Synthesis of 2-thioorotidine and comparison of its unusual instability with its canonical pyrimidine counterparts

Kumar, R., Springsteen, G., & Krishnamurthy, R. (2019). Synthesis of 2-thioorotidine and comparison of its unusual instability with its canonical pyrimidine counterparts. The Journal of Organic Chemistry. doi:10.1021/acs.joc.9b01546

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