Results 101 to 110 of about 34,064 (228)

The microbial ferrous wheel in a neutral pH groundwater seep

Frontiers in Microbiology, 2012
Evidence for microbial Fe redox cycling was documented in a circumneutral pH groundwater seep near Bloomington, Indiana. Geochemical and microbiological analyses were conducted at two sites, a semi-consolidated microbial mat and a floating puffball ...
Eric eRoden, Joyce M McBeth, Marco eBlothe, Elizabeth Maria Percak-Dennett, Emily J Fleming, Rebecca R Holyoke, George W. Luther, David eEmerson   +7 more
doaj   +1 more source

Exoplanets and SETI

, 2017
The discovery of exoplanets has both focused and expanded the search for extraterrestrial intelligence. The consideration of Earth as an exoplanet, the knowledge of the orbital parameters of individual exoplanets, and our new understanding of the ...
A Loeb, A Przybylski, A Stevens, A Wolszczan, BM Oliver, C Majeau, CD Dressing, CE Singer, CR Cowley, DH Forgan, DJ Kessler, DM Kipping, DP Whitmire, EA Petigura, EJ Korpela, FJ Dyson, G Cocconi, GR Harp, GW Pace, H Isaacson, H Kawahara, HA Knutson, HW Lin, I Shklovskiĭ, J Freeman, J Guillochon, J Maire, J Schneider, J Tarter, J Wit de, JF Kasting, JR Kuhn, JT Wright, L Kreidberg, LFA Arnold, LN Filippova, LN Filippova, M Lingam, MC Turnbull, MC Turnbull, NB Cowan, PV Makovetskii, PV Makovetskii, RA Carrigan Jr, RA Carrigan Jr, RHD Corbet, RN Bracewell, RS Dixon, S Shostak, T Henry, T Schelling, WA Traub, Z Osmanov   +52 more
core   +1 more source

AstRoMap European Astrobiology Roadmap

Astrobiology, 2016
The European AstRoMap project (supported by the European Commission Seventh Framework Programme) surveyed the state of the art of astrobiology in Europe and beyond and produced the first European roadmap for astrobiology research.
G. Horneck, N. Walter, F. Westall, J. Grenfell, W. Martin, F. Gómez, S. Leuko, Natuschka Lee, S. Onofri, K. Tsiganis, R. Saladino, E. Pilat-Lohinger, E. Palomba, J. Harrison, F. Rull, Christian Muller, G. Strazzulla, J. Brucato, P. Rettberg, M. Capria   +19 more
semanticscholar   +1 more source

The minimum energy required to build a cell

Scientific Reports
Understanding the energy requirements for cell synthesis accurately and comprehensively has been a longstanding challenge. We introduce a computational model that estimates the minimum energy necessary to build any cell from its constituent parts.
Edwin Ortega-Arzola, Peter M. Higgins, Charles S. Cockell   +2 more
doaj   +1 more source

Life-Detection Technologies for the Next Two Decades

, 2018
Since its inception six decades ago, astrobiology has diversified immensely to encompass several scientific questions including the origin and evolution of Terran life, the organic chemical composition of extraterrestrial objects, and the concept of ...
Bodas, Dhananjay, Carr, Christopher, Chen, Huan, Cleaves II, H. James, Fujii, Yuka, Furukawa, Yoshihiro, Genda, Hidenori, Gillams, Richard J., Giri, Chaitanya, Hamano, Keiko, Jia, Tony Z., Kameda, Shingo, Krishnamurthy, Ramanarayanan, Meinert, Cornelia, Meringer, Markus, Paknikar, Kishore, Rajamani, Sudha, Shivaji, Sisinthy, Steele, Andrew, Taniguchi, Masateru, Usui, Tomohiro, Yabuta, Hikaru, Yamagishi, Akihiko   +22 more
core  

Tactical Scientific Decision-Making during Crewed Astrobiology Mars Missions

Astrobiology, 2019
The limitations placed upon human explorers on the surface of Mars will necessitate a methodology for scientific exploration that is different from standard approaches to terrestrial fieldwork and prior crewed exploration of the Moon.
A. Stevens, S. Nawotniak, W. Garry, S. Payler, A. Brady, Matthew J. Miller, K. Beaton, C. Cockell, D. Lim   +8 more
semanticscholar   +1 more source

Gliese 581g as a scaled-up version of Earth: atmospheric circulation simulations

, 2011
We use three-dimensional simulations to study the atmospheric circulation on the first Earth-sized exoplanet discovered in the habitable zone of an M star.
Anderson, Charbonneau, Cho, Cho, Cooper, Cooper, Cowan, Dvorak, Edwards, Edwards, Fraser, Gold, Gordon, Held, Heng, Joshi, Joshi, Kevin Heng, Kraucunas, Lammer, Mayor, Menou, Merlis, Mitchell, Peixóto, Pierrehumbert, Roeckner, Saravanan, Scalo, Selsis, Shapiro, Shell, Showman, Showman, Smagorinsky, Smagorinsky, Snellen, Stauffer, Stephenson, Steven S. Vogt, Suarez, Tarter, Thrastarson, Vallis, Vogt, Washington, Watkins, Wordsworth, Wordsworth   +48 more
core   +1 more source

Perchlorates on Mars enhance the bacteriocidal effects of UV light

Scientific Reports, 2017
Perchlorates have been identified on the surface of Mars. This has prompted speculation of what their influence would be on habitability. We show that when irradiated with a simulated Martian UV flux, perchlorates become bacteriocidal.
Jennifer Wadsworth, Charles S. Cockell
doaj   +1 more source

Mineral Surface and Fluid Chemistry in Nakhlite Analog Water-Rock Reactions [PDF]

, 2018
We report on experiments with Mars analog materials under diagenetic conditions and find characteristic chemical surface changes in correspondence with the fluid ...
Bridges, J. C., Bullock, M. A., Chavez, C., Filiberto, J., Hicks, L. J., Kelley, S. P., McIntosh, R. A., Miller, M. A., Moore, J. M., Ott, U., Schwenzer, S. P., Smith, H., Swindle, T. D., Treiman, A. H.   +13 more
core  

The habitability of the Universe through 13 billion years of cosmic time [PDF]

, 2016
The field of astrobiology has made tremendous progress in modelling galactic-scale habitable zones which offer a stable environment for life to form and evolve in complexity.
Cockell, Charles, Dayal, Pratika, Ward, Martin   +2 more
core   +1 more source