Results 81 to 90 of about 9,833 (194)
Valuing life detection missions
, 2018 Recent discoveries imply that Early Mars was habitable for life-as-we-know-it; that Enceladus might be habitable; and that many stars have Earth-sized exoplanets whose insolation favors surface liquid water. These exciting discoveries make it more likely
Gaidos, Eric +2 more
core +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.Abstract Atmospheric hydrogen chloride (HCl, or hydrochloric acid) has strong links to volcanic activity on Earth. If it is present in the atmosphere of Mars, it could hint at active magmatic processes, or the outgassing from the remnants of recently dormant volcanoes.
K. S. Olsen
wiley +1 more source
Millimetre‐Scale Stratification of Microbial Communities in Hydrothermal Sediments
Environmental Microbiology, Volume 28, Issue 1, January 2026.Zooming into the millimetre‐scale spatial distribution of organic molecules in hydrothermally impacted sediments using mass spectrometry imaging reveals a distinct lipid zonation with abrupt transitions at critical redox interfaces. This zonation reflects a pronounced stratification of diverse microbial communities and highlights surprisingly ...
Janina Groninga +5 more
wiley +1 more source
Biosignatures Search in Habitable Planets
Galaxies, 2019 The search for life has had a new enthusiastic restart in the last two decades thanks to the large number of new worlds discovered. The about 4100 exoplanets found so far, show a large diversity of planets, from hot giants to rocky planets orbiting small
Riccardo Claudi, Eleonora Alei
doaj +1 more source
Iron Sulfides Produced by Thermococcales: An Iron Detoxification Mechanism
Environmental Microbiology, Volume 28, Issue 1, January 2026.Thermococcales, archaea from hydrothermal vents, promote iron sulfide precipitation, enabling survival in iron‐rich environments. Some cells become encrusted in pyrite and do not survive mineralization, while surviving cells activate metal detoxification genes. This biomineralization process allows the population to withstand toxic iron concentrations,
T. Mariotte +4 more
wiley +1 more source
The fat‐heart entanglement and the role of ‘osteopontin mechanics’ in cardiometabolic senescence
European Journal of Clinical Investigation, Volume 56, Issue 1, January 2026.Abstract Background Residual cardiovascular (CV) risk persists despite therapeutic advances. Obesity is heterogeneous, and visceral adipose tissue (VAT) dysfunction (‘adiposopathy’) complicates risk stratification. Osteopontin (OPN) is a pleiotropic mediator implicated in VAT inflammation, senescence‐associated pathways, atherosclerosis and myocardial ...
Cristina Michelauz +3 more
wiley +1 more source
Hopane biomarkers traced from bedrock to recent sediments and ice at the Haughton Impact Structure, Devon Island: Implications for the search for biomarkers on Mars [PDF]
, 2004 Hopanoid biomarkers have been traced from bedrock to ice in the Haughton Impact Structure, suggesting that they represent a promising strategy in the search for life in ice deposits on Mars and other icy ...
Cockell, C. S. +4 more
core
Beyond Oxygen Fugacity: A Compositional Metric to Probe Earth's Redox Structure
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract We quantify the redox capacity (dO2) by redox titration—defined as the quantity of oxygen required to fully oxidize a sample—for rocks spanning Earth's upper mantle to surface sediments. The values span three orders of magnitude, with the greatest variability in metamorphic and surface rocks that host both highly reduced (rich in carbon and ...
Matthieu Emmanuel Galvez +2 more
wiley +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 +22 more
core
A review of exoplanetary biosignatures [PDF]
Physics Reports, 2017 We review the field of exoplanetary biosignatures with a main focus upon atmospheric gas-phase species. Due to the paucity of data in Earth-like planetary atmospheres a common approach is to extrapolate knowledge from the Solar System and Early Earth to Earth-like exoplanets. We therefore review the main processes (e.g.
openaire +2 more sources