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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May 2017Oxygenation 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

Quantification of oxygen isotope SIMS matrix effects in olivine samples: Correlation with sputter rate

Isa, J., Kohl, I. E., Liu, M-C., Wasson, J. T., Young, E. D., & McKeegan, K. D. (2017). Quantification of oxygen isotope SIMS matrix effects in olivine samples: Correlation with sputter rate. Chemical Geology, 458, 14–21. doi:10.1016/j.chemgeo.2017.03.020

Constraining climate sensitivity and continental versus seafloor weathering using an inverse geological carbon cycle model

Krissansen-Totton, J., & Catling, D. C. (2017). Constraining climate sensitivity and continental versus seafloor weathering using an inverse geological carbon cycle model. Nature Communications, 8, 15423. doi:10.1038/ncomms15423

Global Diversity of Desert Hypolithic Cyanobacteria

Lacap-Bugler, D. C., Lee, K. K., Archer, S., Gillman, L. N., Lau, M. C. Y., Leuzinger, S., … Pointing, S. B. (2017). Global Diversity of Desert Hypolithic Cyanobacteria. Frontiers in Microbiology, 8, None. doi:10.3389/fmicb.2017.00867

Cryostratigraphy and the Sublimation Unconformity in Permafrost from an Ultraxerous Environment, University Valley, McMurdo Dry Valleys of Antarctica

Lapalme, C. M., Lacelle, D., Pollard, W., Fortier, D., Davila, A., & McKay, C. P. (2017). Cryostratigraphy and the Sublimation Unconformity in Permafrost from an Ultraxerous Environment, University Valley, McMurdo Dry Valleys of Antarctica. Permafrost and Periglacial Processes. doi:10.1002/ppp.1948

Biogeography of cryoconite bacterial communities on glaciers of the Tibetan Plateau

Liu, Y., Vick-Majors, T. J., Priscu, J. C., Yao, T., Kang, S., Liu, K., … Li, Y. (2017). Biogeography of cryoconite bacterial communities on glaciers of the Tibetan Plateau. FEMS Microbiology Ecology, 93(6), None. doi:10.1093/femsec/fix072

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