Introducing Vibrio natriegens as a Microbial Model Organism for Microgravity Research.

abstract：:We have observed filamentous carbon-rich structures in samples drilled at 3 different seamounts that belong to the Emperor Seamounts in the Pacific Ocean: Detroit (81 Ma), Nintoku (56 Ma), and Koko Seamounts (48 Ma). The samples consist of low-temperature altered basalts recovered from all 3 seamounts. The maximum dep...

journal_title：Astrobiology

authors： Ivarsson M,Lausmaa J,Lindblom S,Broman C,Holm NG

更新日期：2008-12-01 00:00:00

abstract：:Dryness is one of the main environmental challenges to microbial survival. Understanding the threshold of microbial tolerance to extreme dryness is relevant to better constrain the environmental limits of life on Earth and critically evaluate long-term habitability models of Mars. Biomolecular proxies for microbial ad...

journal_title：Astrobiology

authors： Wilhelm MB,Davila AF,Parenteau MN,Jahnke LL,Abate M,Cooper G,Kelly ET,Parro García V,Villadangos MG,Blanco Y,Glass B,Wray JJ,Eigenbrode JL,Summons RE,Warren-Rhodes K

更新日期：2018-07-01 00:00:00

abstract：:Photosynthesis on Earth can occur in a diversity of organisms in the photosynthetically active radiation (PAR) range of 10 nmol of photons m(-2) s(-1) to 8 mmol of photons m(-2) s(-1). Similar considerations would probably apply to photosynthetic organisms on Earth-like planets (ELPs) in the continuously habitable zon...

journal_title：Astrobiology

authors： Raven JA,Cockell CS

更新日期：2006-08-01 00:00:00

abstract：:We revisit the validity of the presence of O(2) or O(3) in the atmosphere of a rocky planet as being a biosignature. Up to now, the false positive that has been identified applies to a planet during a hot greenhouse runaway, which is restricted to planets outside the habitable zone (HZ) of the star that are closer to ...

journal_title：Astrobiology

authors： Léger A,Fontecave M,Labeyrie A,Samuel B,Demangeon O,Valencia D

更新日期：2011-05-01 00:00:00

abstract：:The articles associated with this Special Collection focus on the NASA BASALT (Biologic Analog Science Associated with Lava Terrains) Research Program, which aims at answering the question, "How do we support and enable scientific exploration during human Mars missions?" To answer this the BASALT team conducted scient...

journal_title：Astrobiology

authors： Lim DSS,Abercromby AFJ,Kobs Nawotniak SE,Lees DS,Miller MJ,Brady AL,Miller MJ,Mirmalek Z,Sehlke A,Payler SJ,Stevens AH,Haberle CW,Beaton KH,Chappell SP,Hughes SS,Cockell CS,Elphic RC,Downs MT,Heldmann JL

更新日期：2019-03-01 00:00:00

abstract：:There is concern in many developed countries that school students are turning away from science. However, students may be choosing not to study science and dismissing the possibility of a scientific career because, in the junior secondary years, they gain a false view of science and the work of scientists. There is a ...

journal_title：Astrobiology

authors： Fergusson J,Oliver C,Walter MR

更新日期：2012-12-01 00:00:00

abstract：:The primary objective of NASA's Mars Science Laboratory (MSL) mission, which will launch in 2011, is to characterize the habitability of a site on Mars through detailed analyses of the composition and geological context of surface materials. Within the framework of established mission goals, we have evaluated the valu...

journal_title：Astrobiology

authors： Michalski JR,Jean-PierreBibring,Poulet F,Loizeau D,Mangold N,Dobrea EN,Bishop JL,Wray JJ,McKeown NK,Parente M,Hauber E,Altieri F,Carrozzo FG,Niles PB

更新日期：2010-09-01 00:00:00

abstract：:Several observations indicate that the cloud deck of the venusian atmosphere may provide a plausible refuge for microbial life. Having originated in a hot proto-ocean or been brought in by meteorites from Earth (or Mars), early life on Venus could have adapted to a dry, acidic atmospheric niche as the warming planet l...

journal_title：Astrobiology

authors： Schulze-Makuch D,Grinspoon DH,Abbas O,Irwin LN,Bullock MA

更新日期：2004-04-01 00:00:00

abstract：:The shallow subsurface of Mars is extremely interesting as a possible microbial habitat because it becomes temporarily wet, it is shielded from radiation, and mixing by aeolian processes could provide the sources of energy and nutrients necessary for sustaining microbial life in it. The Modern Aqueous Habitat Reconnai...

journal_title：Astrobiology

authors： Rennó NO,Backhus R,Cooper C,Flatico JM,Fischer E,Greer LC,Krasowski MJ,Kremic T,Martínez GM,Prokop NF,Sweeney D,Vicente-Retortillo A

更新日期：2019-07-01 00:00:00

abstract：:This experiment was aimed at establishing, for the first time, the survival capability of lichens exposed to space conditions. In particular, the damaging effect of various wavelengths of extraterrestrial solar UV radiation was studied. The lichens used were the bipolar species Rhizocarpon geographicum and Xanthoria e...

journal_title：Astrobiology

authors： Sancho LG,de la Torre R,Horneck G,Ascaso C,de Los Rios A,Pintado A,Wierzchos J,Schuster M

更新日期：2007-06-01 00:00:00

abstract：:Stromatolite structures in Early Archean carbonate deposits form an important clue for the existence of life in the earliest part of Earth's history. Since Mars is thought to have had similar environmental conditions early in its history, the question arises as to whether such stromatolite structures also evolved ther...

journal_title：Astrobiology

authors： Rividi N,van Zuilen M,Philippot P,Ménez B,Godard G,Poidatz E

更新日期：2010-04-01 00:00:00

abstract：:Materials blasted into space from the surface of early Earth may preserve a unique record of our planet's early surface environment. Armstrong et al. (2002) pointed out that such materials, in the form of terrestrial meteorites, may exist on the Moon and be of considerable astrobiological interest if biomarkers from e...

journal_title：Astrobiology

authors： Crawford IA,Baldwin EC,Taylor EA,Bailey JA,Tsembelis K

更新日期：2008-04-01 00:00:00

abstract：:During three low-altitude (99, 66, 66 km) flybys through the Enceladus plume in 2010 and 2011, Cassini's ion neutral mass spectrometer (INMS) made its first high spatial resolution measurements of the plume's gas density and distribution, detecting in situ the individual gas jets within the broad plume. Since those fl...

journal_title：Astrobiology

authors： Teolis BD,Perry ME,Hansen CJ,Waite JH,Porco CC,Spencer JR,Howett CJA

更新日期：2017-09-01 00:00:00

abstract：:The emergence of chirality in enantioselective autocatalysis for compounds unable to transform according to the Frank-like reaction network is discussed with respect to the controversial limited enantioselectivity (LES) model composed of coupled enantioselective and non-enantioselective autocatalyses. The LES model ca...

journal_title：Astrobiology

authors： Ribó JM,Crusats J,El-Hachemi Z,Moyano A,Blanco C,Hochberg D

更新日期：2013-02-01 00:00:00

abstract：:The Dry Valleys of Antarctica are one of the coldest and driest environments on Earth with paleosols in selected areas that date to the emplacement of tills by warm-based ice during the Early Miocene. Cited as an analogue to the martian surface, the ability of the Antarctic environment to support microbial life-forms ...

journal_title：Astrobiology

authors： Hart KM,Szpak MT,Mahaney WC,Dohm JM,Jordan SF,Frazer AR,Allen CC,Kelleher BP

更新日期：2011-05-01 00:00:00

abstract：:The Planetary Society's Phobos Living Interplanetary Flight Experiment (Phobos LIFE) flew in the sample return capsule of the Russian Federal Space Agency's Phobos Grunt mission and was to have been a test of one aspect of the hypothesis that life can move between nearby planets within ejected rocks. Although the Phob...

journal_title：Astrobiology

authors： Betts BH,Warmflash D,Fraze RE,Friedman L,Vorobyova E,Lilburn TG,Smith A,Rettberg P,Jönsson KI,Ciftcioglu N,Fox GE,Svitek T,Kirschvinck JL,Moeller R,Wassmann M,Berger T

更新日期：2019-09-01 00:00:00

abstract：:Aqueous solutions on Mars are theorized to contain very different ion compositions than those on Earth. To determine the effect of such solutions on typical environmental micro-organisms, which could be released from robotic spacecraft or human exploration activity, we investigated the resistance of Sphingomonas desic...

journal_title：Astrobiology

authors： Stevens AH,Childers D,Fox-Powell M,Nicholson N,Jhoti E,Cockell CS

更新日期：2019-01-01 00:00:00

abstract：:Early Earth may have hosted a biologically mediated global organic haze during the Archean eon (3.8-2.5 billion years ago). This haze would have significantly impacted multiple aspects of our planet, including its potential for habitability and its spectral appearance. Here, we model worlds with Archean-like levels of...

journal_title：Astrobiology

authors： Arney G,Domagal-Goldman SD,Meadows VS

更新日期：2018-03-01 00:00:00

abstract：:Fungi are not only present on Earth but colonize spacecraft and space stations as well. This review provides an extensive overview of the large and diverse group of fungal species that have been found in space, as well as those corresponding detection methods used and the existing and potential future prevention and c...

journal_title：Astrobiology

authors： De Middeleer G,Leys N,Sas B,De Saeger S

更新日期：2019-07-01 00:00:00

abstract：:Rover missions to the rocky bodies of the Solar System and especially to Mars require lightweight, portable instruments that use minimal power, require no sample preparation, and provide suitably diagnostic mineralogical information to an Earth-based exploration team. Short-wave infrared (SWIR) spectroscopic instrumen...

journal_title：Astrobiology

authors： Brown A,Walter M,Cudahy T

更新日期：2004-10-01 00:00:00

abstract：:Remote sensing data are abundant, whereas surface in situ verification of atmospheric conditions is rare on Mars. Earth-based analogs could help gain an understanding of soil and atmospheric processes on Mars and refine existing models. In this work, we evaluate the applicability of the Weather Research and Forecastin...

journal_title：Astrobiology

authors： Breuer H,Berényi A,Mari L,Nagy B,Szalai Z,Tordai Á,Weidinger T

更新日期：2020-06-01 00:00:00

abstract：:Granitoids are silicic rocks that make up the majority of the continental crust, but different models arise for the origins of these rocks. One classification scheme defines different granitoid types on the basis of materials involved in the melting/crystallization process. In this end-member case, granitoids may be d...

journal_title：Astrobiology

authors： Trail D,Tailby ND,Sochko M,Ackerson MR

更新日期：2015-07-01 00:00:00

abstract：:In recent years, studies have shown that there are many similarities between comets and asteroids. In some cases, it cannot even be determined to which of these groups an object belongs. This is especially true for objects found beyond the main asteroid belt. Because of the lack of comet fragments, more progress has b...

journal_title：Astrobiology

authors： Bosiek K,Hausmann M,Hildenbrand G

更新日期：2016-04-01 00:00:00

abstract：:The γ-radiolysis of fullerenes (C60 and C70) was performed to investigate the role of fullerenes as a carbon source in building organic molecules in astrophysical ice analog media. Mass spectrometric analyses and the sequential collision-induced dissociation processes enabled us to determine the plausible chemical str...

journal_title：Astrobiology

authors： Ursini O,Angelini G,Cataldo F,Iglesias-Groth S

更新日期：2019-07-01 00:00:00

abstract：:Ultraviolet (UV) irradiation on the surface of Mars is an important factor that affects the survivability of microorganisms on Mars. The possibility of martian brines made from Fe2(SO4)3, MnSO4, and MgSO4 salts providing a habitable niche on Mars via attenuation of UV radiation was investigated on the bacteria Bacillu...

journal_title：Astrobiology

authors： Godin PJ,Schuerger AC,Moores JE

更新日期：2020-11-25 00:00:00

abstract：:The astrobiological significance of certain environment types on Mars strongly depends on the temperature, duration, and chemistry of liquid water that was present there in the past. Recent works have focused on the identification of signs of ancient water on Mars, as it is more difficult to estimate the above-mention...

journal_title：Astrobiology

authors： Kereszturi A

更新日期：2012-06-01 00:00:00

abstract：:Epsomite (MgSO(4).7H(2)O) and hexahydrite (MgSO(4).6H(2)O) are common minerals found in marine evaporite deposits, in saline lakes as precipitates, in weathering zones of coal and metallic deposits, in some soils and their efflorescences, and possibly on the surface of Europa as evaporite deposits. Thermodynamic prope...

journal_title：Astrobiology

authors： Chou IM,Seal RR 2nd

更新日期：2003-10-01 00:00:00

abstract：:Microbialites can have complex morphologies that preserve clues to ancient microbial ecology. However, extracting and interpreting these clues is challenging due to both the complexity of microbial structures and the difficulties of connecting morphology to microbial processes. Fenestrate microbialites from the 2521±3...

journal_title：Astrobiology

authors： Stevens EW,Sumner DY,Harwood CL,Crutchfield JP,Hamann B,Kreylos O,Puckett E,Senge P

更新日期：2011-07-01 00:00:00

abstract：:We investigate a new mechanism for producing oxidants, especially hydrogen peroxide (H2O2), on Mars. Large-scale electrostatic fields generated by charged sand and dust in the martian dust devils and storms, as well as during normal saltation, can induce chemical changes near and above the surface of Mars. The most dr...

journal_title：Astrobiology

authors： Atreya SK,Wong AS,Renno NO,Farrell WM,Delory GT,Sentman DD,Cummer SA,Marshall JR,Rafkin SC,Catling DC

更新日期：2006-06-01 00:00:00

abstract：:The five major mass extinctions identified in 1982 by Raup and Sepkoski have expanded to six, with the suggestion that the Permian-Triassic extinction was a double event. Is there a general explanation for great mass extinctions, or can they result from different triggers, or even from internal system instabilities? T...

journal_title：Astrobiology

authors： Alvarez W

更新日期：2003-04-01 00:00:00