Results 31 to 40 of about 4,756 (134)

ASTROBIOLOGY AND ASTROCHRISTOLOGY

open access: yesZygon, 2016
Astrochristology, as a subfield within the more comprehensive astrotheology, speculates on the implications of what astrobiology and related space sciences learn about our future space neighbors.
doaj   +2 more sources

Philosophical Aspects of Astrobiology Revisited

open access: yesPhilosophies, 2021
Given the idea that Life as we know it is nothing but a special form of a generically underlying dynamical structure within the physical Universe, we try to introduce a concept of Life that is not only derived from first principles of fundamental physics,
Rainer E. Zimmermann
doaj   +1 more source

Enhancing UV-C and perchlorate resistance in Arabidopsis thaliana through the introduction of microbial genes from hypersaline environment

open access: yesFrontiers in Microbiology
Ultraviolet (UV) radiation reaching the Earth's surface affects all living organisms. Recent reports show a trend of increasing exposure levels due to stratospheric ozone depletion and contamination.
Carolina González de Figueras   +7 more
doaj   +1 more source

Islam, Science Fiction and Extraterrestrial Life. The Culture of Astrobiology in the Muslim World, by Jörg Matthias Detterman (2021)

open access: yesJournal of Science Fiction and Philosophy, 2022
Review of "Islam, Science Fiction and Extraterrestrial Life. The Culture of Astrobiology in the Muslim World," by Jörg Matthias Detterman (I.B. Tauris, 2021).
Stefano Bigliardi
doaj  

Physiological Differentiation within a Single-Species Biofilm Fueled by Serpentinization

open access: yesmBio, 2011
Carbonate chimneys at the Lost City hydrothermal field are coated in biofilms dominated by a single phylotype of archaea known as Lost City Methanosarcinales. In this study, we have detected surprising physiological complexity in single-species biofilms,
William J. Brazelton   +3 more
doaj   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

open access: yesSedimentology, Volume 73, Issue 5, Page 1842-1866, August 2026.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source

Oxidation of Aqueous Sulfide by Chlorate: Implications for Native Sulfur Formation on Mars

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The recent discovery of native sulfur (“sulfur stones” consist of elemental sulfur) by Curiosity rover in the Gale Crater has sparked considerable research interest toward identifying its formation mechanisms that could generate novel insights into Martian sulfur cycling.
J. Wang   +5 more
wiley   +1 more source

The Water Activity of Mars-relevant Multicomponent Brines: The Changing Influence of Perchlorate on Habitability over Time

open access: yesThe Planetary Science Journal, 2023
Low water activity limits the habitability of aqueous environments, and salts present on Mars are known to reduce water activity. As environmental brines are not pure solutions of a single salt, predicting their water activity is difficult without direct
Adam H. Stevens, Charles S. Cockell
doaj   +1 more source

Dark Land Surfaces Allow for Refugia That Could Support Photosynthetic Life on the Surface of Snowball Earth

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 13, 16 July 2026.
Abstract Photosynthetic eukaryotic algae survived the Neoproterozoic Snowball Earth events, indicating that liquid‐water refugia existed somewhere on the surface. We examine the potential for refugia at the coldest time of a snowball event, before CO2 had risen and with high‐albedo ice on the frozen ocean, before it became darkened by dust deposition ...
Greta E. M. Shum   +5 more
wiley   +1 more source

Harnessing Generative AI Within Human‐Aligned Constraints: Exploring Control Strategies and Existential Considerations

open access: yesEngineering Reports, Volume 8, Issue 7, July 2026.
We propose the Powerful‐but‐Limited Generative AI theorem, demonstrating that embedding human‐inspired constraints, such as fixed utility functions and neuro‐symbolic submission layers, ensures generative AI remains controllable by preventing self‐improvement beyond designer intent.
Saeed Banaeian Far   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy