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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February 2020Extraterrestrial, shock-formed, cage-like nanostructured carbonaceous materials

Németh, P., & Garvie, L. A. J. (2020). Extraterrestrial, shock-formed, cage-like nanostructured carbonaceous materials. American Mineralogist, 105(2), 276–281. doi:10.2138/am-2020-7305

Hints on the origins of particle traps in protoplanetary disks given by the M_dust-M_* relation

Pinilla, P., Pascucci, I., & Marino, S. (2020). Hints on the origins of particle traps in protoplanetary disks given by the M_dust-M_* relation. Astronomy & Astrophysics. doi:10.1051/0004-6361/201937003

Dark biological superoxide production as a significant flux and sink of marine dissolved oxygen

Sutherland, K. M., Wankel, S. D., & Hansel, C. M. (2020). Dark biological superoxide production as a significant flux and sink of marine dissolved oxygen. Proceedings of the National Academy of Sciences, 117(7), 3433–3439. doi:10.1073/pnas.1912313117

Primordial organic matter in the xenolithic clast in the Zag H chondrite: Possible relation to D/P asteroids

Kebukawa, Y., Zolensky, M. E., Ito, M., Ogawa, N. O., Takano, Y., Ohkouchi, N., … Kobayashi, K. (2020). Primordial organic matter in the xenolithic clast in the Zag H chondrite: Possible relation to D/P asteroids. Geochimica et Cosmochimica Acta, 271, 61–77. doi:10.1016/j.gca.2019.12.012

Possible H2O storage in the crystal structure of CaSiO3 perovskite

Chen, H., Leinenweber, K., Prakapenka, V., Prescher, C., Meng, Y., Bechtel, H., … Shim, S-H. (2020). Possible H2O storage in the crystal structure of CaSiO3 perovskite. Physics of the Earth and Planetary Interiors, 299, 106412. doi:10.1016/j.pepi.2019.106412

January 2020Uranium Isotope Fractionation (238U/235U) during U(VI) Uptake by Freshwater Plankton

Chen, X., Zheng, W., Anbar, A.D. (2020). Uranium Isotope Fractionation (238U/235U) during U(VI) Uptake by Freshwater Plankton. Environmental Science and Technology. doi.org/10.1021/acs.est.9b06421

First Resolved Scattered-light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager

Hom, J., Patience, J., Esposito, T. M., Duchêne, G., Worthen, K., Kalas, P., … Zuckerman, B. (2020). First Resolved Scattered-light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager. The Astronomical Journal, 159(1), 31. doi:10.3847/1538-3881/ab5af2

Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films

Jurewicz, A. J. G., Rieck, K. D., Hervig, R., Burnett, D. S., Wadhwa, M., Olinger, C. T., … Williams, P. (2020). Magnesium isotopes of the bulk solar wind from Genesis diamond‐like carbon films. Meteoritics & Planetary Science. doi:10.1111/maps.13439

Hydrothermal influence on barite precipitates in the basal Ediacaran Sete Lagoas cap dolostone, São Francisco Craton, central Brazil

Okubo, J., Klyukin, Y. I., Warren, L. V., Matthew Sublett Jr., D., Bodnar, R. J., Gill, B. C., & Xiao, S. (2020). Hydrothermal influence on barite precipitates in the basal Ediacaran Sete Lagoas cap dolostone, São Francisco Craton, central Brazil. Precambrian Research, None, 105628. doi:10.1016/j.precamres.2020.105628

Atmospheric CO2 levels from 2.7 billion years ago inferred from micrometeorite oxidation

Lehmer, O. R., Catling, D. C., Buick, R., Brownlee, D. E., & Newport, S. (2020). Atmospheric CO2 levels from 2.7 billion years ago inferred from micrometeorite oxidation. Science Advances, 6(4), eaay4644. doi:10.1126/sciadv.aay4644

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