Results 61 to 70 of about 2,858 (221)

Nanoscale investigations of complex microbial interactions with terrestrial and extraterrestrial minerals using STEM based approach: implications for life on Earth and beyond

Frontiers in Environmental Chemistry
Our recent investigations using scanning transmission electron microscopy (STEM) based approach address tungsten-microbial interactions as a microbial strategy to withstand harsh environments, microbial metal extraction capacities for bioleaching ...
Tetyana Milojevic, Mihaela Albu, Ilse Letofsky-Papst, Artem Mashchenko   +3 more
doaj   +1 more source

Can Spacecraft‐Borne Contamination Compromise Our Understanding of Lunar Ice Chemistry?

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract Recent detections of water ice in the permanently shadowed regions (PSRs) at the lunar poles have reignited scientific and commercial interest in the exploration of Earth's closest neighbor. The frigid temperatures in PSRs operate as cold traps for volatiles and may represent large reservoirs of materials, including water ice and prebiotic ...
Francisca S. Paiva, Silvio Sinibaldi
wiley   +1 more source

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source

Discovery of Naturally Etched Fission Tracks and Alpha-Recoil Tracks in Submarine Glasses: Reevaluation of a Putative Biosignature for Earth and Mars

International Journal of Geophysics, 2016
Over the last two decades, conspicuously “biogenic-looking” corrosion microtextures have been found to occur globally within volcanic glass of the in situ oceanic crust, ophiolites, and greenstone belts dating back to ~3.5 Ga.
Jason E. French, David F. Blake
doaj   +1 more source

Microbial iron cycling in acidic geothermal springs of Yellowstone National Park: Integrating molecular surveys, geochemical processes and isolation of novel Fe-active microorganisms

Frontiers in Microbiology, 2012
Geochemical, molecular, and physiological analyses of microbial isolates were combined to study the geomicrobiology of acidic iron oxide mats in Yellowstone National Park (YNP).
Mark A Kozubal, Richard E Macur, Zack J Jay, Jake P Beam, Stephanie A Malfatti, Susannah Green Tringe, Benjamin D Kocar, Thomas eBorch, William P. Inskeep   +8 more
doaj   +1 more source

Microbialite Niches Across the Archean and Paleoproterozoic

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Changes in microbialite abundance during the Archean and Paleoproterozoic have been attributed to a variety of environmental and biological factors, yet past work looking at large‐scale patterns of microbialite abundance generally assumes shallow marine deposition rather than incorporating specific settings.
C. M. Howard, N. D. Sheldon
wiley   +1 more source

Nothing special in the specialist? Draft genome sequence of Cryomyces antarcticus, the most extremophilic fungus from Antarctica.

PLoS ONE, 2014
The draft genome of the Antarctic endemic fungus Cryomyces antarcticus is presented. This rock inhabiting, microcolonial fungus is extremely stress tolerant and it is a model organism for exobiology and studies on stress resistance in Eukaryots.
Katja Sterflinger, Ksenija Lopandic, Ram Vinay Pandey, Barbara Blasi, Albert Kriegner   +4 more
doaj   +1 more source

Editorial: Presentations at the 4th Workshop of the German Astrobiological Society (DAbG) on Astrobiology, 26–27 September 2019, Vienna, Austria

Frontiers in Astronomy and Space Sciences, 2021
Tetyana Milojevic, Rosa De La Torre Noetzel, Oliver Strbak, Dirk Schulze-Makuch, Dirk Schulze-Makuch, Dirk Schulze-Makuch   +5 more
doaj   +1 more source

The Computational Boundary of a “Self”: Developmental Bioelectricity Drives Multicellularity and Scale-Free Cognition

Frontiers in Psychology, 2019
All epistemic agents physically consist of parts that must somehow comprise an integrated cognitive self. Biological individuals consist of subunits (organs, cells, and molecular networks) that are themselves complex and competent in their own native ...
Michael Levin, Michael Levin
doaj   +1 more source

First record of multicellular filamentous benthic bacteria from freshwater lagoons in central Chile

Gayana
Observations on “macrobacteria” inhabiting the reduced bottoms of two freshwater lagoons in central Chile are here presented. The new finding of morphologically diverse, colorless multicellular filamentous bacteria expands their known presence into ...
Felipe Durán-Garcés, Carola Espinoza, Víctor A. Gallardo   +2 more
doaj