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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June 2017The future of Stardust science

Westphal, A. J., Bridges, J. C., Brownlee, D. E., Butterworth, A. L., De Gregorio, B. T., Dominguez, G., … Zolensky, M. E. (2017). The future of Stardust science. Meteoritics & Planetary Science, 52(9), 1859–1898. doi:10.1111/maps.12893

An appraisal of the enzyme stability‐activity trade‐off

Miller, S. R. (2017). An appraisal of the enzyme stability‐activity trade‐off. Evolution, 71(7), 1876–1887. doi:10.1111/evo.13275

May 2017 In situ electrochemical enrichment and isolation of a magnetite-reducing bacterium from a high pH serpentinizing spring

Rowe, A. R., Yoshimura, M., LaRowe, D. E., Bird, L. J., Amend, J. P., Hashimoto, K., … Okamoto, A. (2017). In situ electrochemical enrichment and isolation of a magnetite-reducing bacterium from a high pH serpentinizing spring. Environmental Microbiology. doi:10.1111/1462-2920.13723

Organically bound iodine as a bottom-water redox proxy: Preliminary validation and application

Zhou, X., Jenkyns, H. C., Lu, W., Hardisty, D. S., Owens, J. D., Lyons, T. W., & Lu, Z. (2017). Organically bound iodine as a bottom-water redox proxy: Preliminary validation and application. Chemical Geology, 457, 95–106. doi:10.1016/j.chemgeo.2017.03.016

The Anoka, Minnesota iron meteorite as parent to Hopewell meteoritic metal beads from Havana, Illinois

McCoy, T. J., Marquardt, A. E., Wasson, J. T., Ash, R. D., & Vicenzi, E. P. (2017). The Anoka, Minnesota iron meteorite as parent to Hopewell meteoritic metal beads from Havana, Illinois. Journal of Archaeological Science, 81, 13–22. doi:10.1016/j.jas.2017.03.003

Oxygenation history of the Neoproterozoic to early Phanerozoic and the rise of land plants

Wallace, M. W., Hood, A. v., Shuster, A., Greig, A., Planavsky, N. J., & Reed, C. P. (2017). Oxygenation history of the Neoproterozoic to early Phanerozoic and the rise of land plants. Earth and Planetary Science Letters, 466, 12–19. doi:10.1016/j.epsl.2017.02.046

Reaction of glycine with glyoxylate: Competing transaminations, aldol reactions, and decarboxylations

Conley, M., Mojica, M., Mohammed, F., Chen, K., Napoline, J. W., Pollet, P., … Liotta, C. L. (2017). Reaction of glycine with glyoxylate: Competing transaminations, aldol reactions, and decarboxylations. Journal of Physical Organic Chemistry, 30(12), e3709. doi:10.1002/poc.3709

Group Intelligence: An Active Learning Exploration of Diversity in Evolution

Parsons, C. J., Salaita, M. K., Hughes, C. H., Lynn, D. G., Fristoe, A., Fristoe, A., & Grover, M. A. (2017). Group Intelligence: An Active Learning Exploration of Diversity in Evolution. Journal of Chemical Education, 94(6), 717–721. doi:10.1021/acs.jchemed.6b00518

One possible source of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth

Babikov, D., Semenov, A., & Teplukhin, A. (2017). One possible source of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth. Geochimica et Cosmochimica Acta, 204, 388–406. doi:10.1016/j.gca.2017.01.029

Cooperative Interactions in the Hammerhead Ribozyme Drive pKa Shifting of G12 and Its Stacked Base C17

Frankel, E. A., Strulson, C. A., Keating, C. D., & Bevilacqua, P. C. (2017). Cooperative Interactions in the Hammerhead Ribozyme Drive pKa Shifting of G12 and Its Stacked Base C17. Biochemistry, 56(20), 2537–2548. doi:10.1021/acs.biochem.7b00174

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