Results 71 to 80 of about 28,042 (247)
, 2021 Astrobiology seeks to understand the origin, evolution, distribution, and future of life in the universe and thus to integrate biology with planetary science, astronomy, cosmology, and the other physical sciences. The discipline emerged in the late 20th century, partly in response to the development of space exploration programs in the United States ...
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Nature Communications, 2017 The influence of tectonics, continental weathering, and seafloor weathering in the geological carbon cycle remain unclear. Here, the authors develop a new carbon cycle model and, through comparison with proxy data, critically evaluate the influence of ...
Joshua Krissansen-Totton +1 more
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Frontiers in Microbiology, 2018 Iron (Fe) redox-based metabolisms likely supported life on early Earth and may support life on other Fe-rich rocky planets such as Mars. Modern systems that support active Fe redox cycling such as Chocolate Pots (CP) hot springs provide insight into how ...
Nathaniel W. Fortney +5 more
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Meteoritics &Planetary Science, EarlyView.Abstract Meteorites are easily contaminated at the Earth's surface by microbial activity. Here, DNA extracts from two meteorite specimens and samples from curation laboratory surfaces are analyzed with amplicon sequencing, to understand microbial communities that contaminate meteorites and that may be resident in curation facilities.
Libby D. Tunney +4 more
wiley +1 more source
Extending Astrobiology: Consciousness and Culture [PDF]
, 2011 The Stanley Miller experiment suggests that amino acid-based life is ubiquitous in our universe, although its varieties are not likely to have followed the particular, highly contingent and path-dependent, evolutionary trajectory found on Earth. Are many
Rodrick Wallace
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Scientific Reports, 2023 Essential insights on the characterization and quality of a detectable biosphere are gained by analyzing the effects of its environmental parameters. We compiled environmental and biological properties of the Phanerozoic Eon from various published data ...
Iva Vilović +2 more
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Viability and Motility of Escherichia coli Under Elevated Martian Salt Stresses
LifeThis study investigates the effects of three Martian-relevant salts—sodium chlorate, sodium perchlorate, and sodium chloride—on the viability and motility of Escherichia coli, a model organism for understanding microbial responses to environmental stress.
Max Riekeles +3 more
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Life, 2020 The habitability of Mars is strongly dependent on the availability of liquid water, which is essential for life as we know it. One of the few places where liquid water might be found on Mars is in liquid perchlorate brines that could form via ...
Jacob Heinz +2 more
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Scientific ReportsThe Martian surface and shallow subsurface lacks stable liquid water, yet hygroscopic salts in the regolith may enable the transient formation of liquid brines.
Florian Carlo Fischer +2 more
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Astronomy & Geophysics, 2009 Mark Burchell and Lewis Dartnell review the current standing of astrobiology research in the UK, and look to future success.
Lewis Dartnell, Mark J. Burchell
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