NASA Astrobiology

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A volcanically active planet is shown in closeup at the left side of the image with glowing eruptions and lines of lava on the surface. To the right and in the distance is a faint blue glowing ball representing the more massive planet in the system.

Sixteen frames from Voyager 1's flyby of Jupiter in 1979 were merged to create this image. Jupiter's Great Red Spot is visible in the center. Jupiter's moon Europa can be seen in the foreground at the bottom left of the image.

The frame is a horizontal rainbow of color on a grid. Shadows of molecules can be seen through the light as well as the jagged peaks and troughs of spectral lines.

Fizzy Super Earths and Lava Worlds“Fizzy Super-Earths: Impacts of Magma Composition on the Bulk Density and Structure of Lava Worlds.” in The Astrophysical Journal.01/03

Identifying Hydrothermal Activity on Icy Ocean Worlds“Ethene-ethanol ratios as potential indicators of hydrothermal activity at Enceladus, Europa, and other icy ocean worlds.” In Icarus.02/03

NASA Raman Spectroscopic Database"The NASA Raman spectroscopic database: Ramdb version 1.00.” In Icarus.03/03

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April 2020Origin and age of metal veins in Canyon Diablo graphite nodules

Hilton, C. D., Ash, R. D., Piccoli, P. M., Kring, D. A., McCoy, T. J., & Walker, R. J. (2020). Origin and age of metal veins in Canyon Diablo graphite nodules. Meteoritics & Planetary Science. doi:10.1111/maps.13464

Diamond-graphene composite nanostructures

Németh, P., McColl, K., Smith, R. L., Murri, M., Garvie, L. A. J., Alvaro, M., … McMillan, P. F. (2020). Diamond-graphene composite nanostructures. Nano Letters. doi:10.1021/acs.nanolett.0c00556

New codons for efficient production of unnatural proteins in a semisynthetic organism

Fischer, E. C., Hashimoto, K., Zhang, Y., Feldman, A. W., Dien, V. T., Karadeema, R. J., … Romesberg, F. E. (2020). New codons for efficient production of unnatural proteins in a semisynthetic organism. Nature Chemical Biology. doi:10.1038/s41589-020-0507-z

Acid Experimental Evolution of the Haloarchaeon Halobacterium sp. NRC-1 Selects Mutations Affecting Arginine Transport and Catabolism

Kunka, K. S., Griffith, J. M., Holdener, C., Bischof, K. M., Li, H., DasSarma, P., … Slonczewski, J. L. (2020). Acid Experimental Evolution of the Haloarchaeon Halobacterium sp. NRC-1 Selects Mutations Affecting Arginine Transport and Catabolism. Frontiers in Microbiology, 11, None. doi:10.3389/fmicb.2020.00535

Infaunal augurs of the Cambrian explosion: An Ediacaran trace fossil assemblage from Nevada, USA

Tarhan, L. G., Myrow, P. M., Smith, E. F., Nelson, L. L., & Sadler, P. M. (2020). Infaunal augurs of the Cambrian explosion: An Ediacaran trace fossil assemblage from Nevada, USA. Geobiology. doi:10.1111/gbi.12387

Draft Genome Sequence of Desulfobacter hydrogenophilus DSM 3380, a Psychrotolerant Sulfate-Reducing Bacterium

Bertran, E., Ward, L. M., & Johnston, D. T. (2020). Draft Genome Sequence of Desulfobacter hydrogenophilus DSM 3380, a Psychrotolerant Sulfate-Reducing Bacterium. Microbiology Resource Announcements, 9(14), None. doi:10.1128/mra.00203-20

A dynamic microbial sulfur cycle in a serpentinizing continental ophiolite

Sabuda, M. C., Brazelton, W. J., Putman, L. I., McCollom, T. M., Hoehler, T. M., Kubo, M. D. Y., … Schrenk, M. O. (2020). A dynamic microbial sulfur cycle in a serpentinizing continental ophiolite. Environmental Microbiology, 22(6), 2329–2345. doi:10.1111/1462-2920.15006

Evolution of new enzymes by gene duplication and divergence

Copley, S. D. (2020). Evolution of new enzymes by gene duplication and divergence. The FEBS Journal, 287(7), 1262–1283. doi:10.1111/febs.15299

The Solidus and Melt Productivity of Nominally Anhydrous Martian Mantle Constrained by New High Pressure‐Temperature Experiments—Implications for Crustal Production and Mantle Source Evolution

Ding, S., Dasgupta, R., & Tsuno, K. (2020). The Solidus and Melt Productivity of Nominally Anhydrous Martian Mantle Constrained by New High Pressure‐Temperature Experiments—Implications for Crustal Production and Mantle Source Evolution. Journal of Geophysical Research: Planets, 125(4), None. doi:10.1029/2019je006078

Uncertainty Quantification in Planetary Thermal History Models: Implications for Hypotheses Discrimination and Habitability Modeling

Seales, J., & Lenardic, A. (2020). Uncertainty Quantification in Planetary Thermal History Models: Implications for Hypotheses Discrimination and Habitability Modeling. The Astrophysical Journal, 893(2), 114. doi:10.3847/1538-4357/ab822b

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