Results 51 to 60 of about 4,756 (134)
Magnetic properties of geraisites, the first tektite strewn field identified in Brazil
Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1163-1178, July 2026.Abstract Geraisites are a newly recognized class of tektite from Brazil. They occur as centimeter‐sized, elongated to subspherical bodies scattered across surface gravel and shallow subsurface layers within a ~90‐km‐long strewn field extending between the municipalities of São João do Paraíso and Curral de Dentro, near the border between the states of ...
Melissa De Andrade Nunes +7 more
wiley +1 more source
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
Molecular Plant Pathology, Volume 27, Issue 7, July 2026.We profile Pseudomonas syringae pv. aptata, causing bacterial leaf spot on chenopods and cucurbits, highlighting epidemiology, virulence mechanisms and integrated disease management strategies. ABSTRACT Taxonomy Kingdom Bacteria; Phylum Proteobacteria; Class Gammaproteobacteria; Family Pseudomonadaceae; Genus Pseudomonas; Species Pseudomonas syringae ...
Ivan Nikolić +7 more
wiley +1 more source
Physical Review Physics Education ResearchMassive open online courses (MOOCs) experienced a resurgence in popularity due to the COVID-19 pandemic. In this work, we studied participants in an astrobiology MOOC offered on Coursera since April 2019.
Skylar Grayson +4 more
doaj +1 more source
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
doaj +1 more source
iScienceSummary: Deciphering the fossil record of cyanobacteria is crucial to understand their role in the chemical and biological evolution of the early Earth.
Catherine F. Demoulin +12 more
doaj +1 more source
The minimum energy required to build a cell
Scientific ReportsUnderstanding the energy requirements for cell synthesis accurately and comprehensively has been a longstanding challenge. We introduce a computational model that estimates the minimum energy necessary to build any cell from its constituent parts.
Edwin Ortega-Arzola +2 more
doaj +1 more source
Perchlorates on Mars enhance the bacteriocidal effects of UV light
Scientific Reports, 2017 Perchlorates have been identified on the surface of Mars. This has prompted speculation of what their influence would be on habitability. We show that when irradiated with a simulated Martian UV flux, perchlorates become bacteriocidal.
Jennifer Wadsworth, Charles S. Cockell
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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
Terrestrial atmosphere, water and astrobiology
EPJ Web of Conferences, 2010 Primitive life, defined as a chemical system capable to transfer its molecular information via self-replication and also capable to evolve, originated about 4 billion years ago from the processing of organic molecules by liquid water.
Coradini M., Brack A.
doaj +1 more source