Results 91 to 100 of about 32,223 (288)
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
doaj +1 more source
, 2016 O2 and O3 have been long considered the most robust individual biosignature gases in a planetary atmosphere, yet multiple mechanisms that may produce them in the absence of life have been described.
Arney, Giada N. +8 more
core +1 more source
Geobiology, Volume 23, Issue 4, July/August 2025.ABSTRACT Interface environments between extreme and neutrophilic conditions are often hotspots of metabolic activity and taxonomic diversity. In serpentinizing systems, the mixing of high pH fluids with meteoric water, and/or the exposure of these fluids to the atmosphere can create interface environments with distinct but related metabolic activities ...
Leah Trutschel +6 more
wiley +1 more source
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
openaire +2 more sources
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
doaj +1 more source
Galactic Punctuated Equilibrium: How to Undermine Carter's Anthropic Argument in Astrobiology
, 2009 We investigate a new strategy which can defeat the (in)famous Carter's "anthropic" argument against extraterrestrial life and intelligence. In contrast to those already considered by Wilson, Livio, and others, the present approach is based on relaxing ...
Annis J. +6 more
core +1 more source
Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.Abstract Backwater morphodynamics describe feedbacks between hydraulics and sedimentation in fluvio‐deltaic systems in the coastal backwater zone. On Earth, normalized channel belt width decreases approaching the coastline and drops sharply at the start of the backwater zone.
C. M. Hughes +3 more
wiley +1 more source
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 +7 more
doaj +1 more source
Astrobiological Effects of F, G, K and M Main-Sequence Stars
, 2008 We focus on the astrobiological effects of photospheric radiation produced by main-sequence stars of spectral types F, G, K, and M. The photospheric radiation is represented by using realistic spectra, taking into account millions or hundred of millions ...
E. F. Guinan +4 more
core +1 more source
Microbial Ecology of Permafrost Soils: Populations, Processes, and Perspectives
Permafrost and Periglacial Processes, Volume 36, Issue 2, Page 245-258, April/June 2025.ABSTRACT Permafrost microbial research has flourished in the past decades, due in part to improvements in sampling and molecular techniques, but also the increased focus on the permafrost greenhouse gas feedback to climate change and other ecological processes in high latitude and alpine permafrost soils.
Mark P. Waldrop +33 more
wiley +1 more source