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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August 2020Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide

Liu, W., Hao, J., Elzinga, E. J., Piotrowiak, P., Nanda, V., Yee, N., & Falkowski, P. G. (2020). Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide. Proceedings of the National Academy of Sciences, None, 202002175. doi:10.1073/pnas.2002175117

Prebiotic origin of pre‐RNA building blocks in a urea “warm little pond” scenario.

Menor-Salvan, C., Bouza, M., Fialho, D. M., Burcar, B. T., Fernández, F. M., & Hud, N. V. (2020). Prebiotic origin of pre‐RNA building blocks in a urea “warm little pond” scenario.. ChemBioChem. doi:10.1002/cbic.202000510

Complex nanostructures in diamond

Németh, P., McColl, K., Garvie, L. A. J., Salzmann, C. G., Murri, M., & McMillan, P. F. (2020). Complex nanostructures in diamond. Nature Materials. doi:10.1038/s41563-020-0759-8

Supersized Ribosomal RNA Expansion Segments in Asgard Archaea

Penev, P. I., Fakhretaha-Aval, S., Patel, V. J., Cannone, J. J., Gutell, R. R., Petrov, A. S., … Glass, J. B. (2020). Supersized Ribosomal RNA Expansion Segments in Asgard Archaea. Genome Biology and Evolution, 12(10), 1694–1710. doi:10.1093/gbe/evaa170

A tale of three taphonomic modes: The Ediacaran fossil Flabellophyton preserved in limestone, black shale, and sandstone

Wan, B., Chen, Z., Yuan, X., Pang, K., Tang, Q., Guan, C., … Xiao, S. (2020). A tale of three taphonomic modes: The Ediacaran fossil Flabellophyton preserved in limestone, black shale, and sandstone. Gondwana Research, 84, 296–314. doi:10.1016/j.gr.2020.04.003

Abiotic redox reactions in hydrothermal mixing zones: Decreased energy availability for the subsurface biosphere

McDermott, J. M., Sylva, S. P., Ono, S., German, C. R., & Seewald, J. S. (2020). Abiotic redox reactions in hydrothermal mixing zones: Decreased energy availability for the subsurface biosphere. Proceedings of the National Academy of Sciences, None, 202003108. doi:10.1073/pnas.2003108117

Evidence for Multiple Diagenetic Episodes in Ancient Fluvial‐Lacustrine Sedimentary Rocks in Gale Crater, Mars

Achilles, C. N., Rampe, E. B., Downs, R. T., Bristow, T. F., Ming, D. W., Morris, R. V., … Morookian, J. M. (2020). Evidence for Multiple Diagenetic Episodes in Ancient Fluvial‐Lacustrine Sedimentary Rocks in Gale Crater, Mars. Journal of Geophysical Research: Planets, 125(8), None. doi:10.1029/2019je006295

Thallium isotope ratios in shales from South China and northwestern Canada suggest widespread O2 accumulation in marine bottom waters was an uncommon occurrence during the Ediacaran Period

Ostrander, C. M., Owens, J. D., Nielsen, S. G., Lyons, T. W., Shu, Y., Chen, X., … Anbar, A. D. (2020). Thallium isotope ratios in shales from South China and northwestern Canada suggest widespread O2 accumulation in marine bottom waters was an uncommon occurrence during the Ediacaran Period. Chemical Geology, None, 119856. doi:10.1016/j.chemgeo.2020.119856

Iron phosphate in the Ediacaran Doushantuo Formation of South China: A previously undocumented marine phosphate sink

Schwid, M. F., Xiao, S., Hiatt, E. E., Fang, Y., & Nolan, M. R. (2020). Iron phosphate in the Ediacaran Doushantuo Formation of South China: A previously undocumented marine phosphate sink. Palaeogeography, Palaeoclimatology, Palaeoecology, None, 109993. doi:10.1016/j.palaeo.2020.109993

Probable benthic macroalgae from the Ediacara Member, South Australia

Xiao, S., Gehling, J. G., Evans, S. D., Hughes, I. V., & Droser, M. L. (2020). Probable benthic macroalgae from the Ediacara Member, South Australia. Precambrian Research, None, 105903. doi:10.1016/j.precamres.2020.105903

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