Results 91 to 100 of about 27,747 (265)
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
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
PAHs and the Universe, 2020 In dense molecular clouds, the birthplace of stars and planets, interstellar atoms and molecules freeze onto extremely cold dust and ice particles. These ices are processed by ultraviolet light and cosmic rays forming hundreds of far more complex species,
L. Allamandola
semanticscholar +1 more source
Global Model of Atmospheric Chlorate on Earth
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 5, 16 March 2025.Abstract Naturally occurring chlorate (ClO3−) has been observed on Earth and potentially plays important roles in hydrology and mineralogy on Mars. However, natural sources of chlorate are uncertain. Here, we quantify the importance of atmospheric sources of chlorate.
Yuk‐Chun Chan +8 more
wiley +1 more source
SETI is Part of Astrobiology [PDF]
arXiv, 2018 "Traditional SETI is not part of astrobiology" declares the NASA Astrobiology Strategy 2015 document. This is incorrect. In this white paper, I argue that SETI$-$seen as the search for technosignatures characteristic of the future of life in the universe$-$is a neglected complement to the search for biosignatures in NASA's astrobiology portfolio, and ...
arxiv
Extending Astrobiology: Consciousness and Culture [PDF]
, 2011 The Stanley Miller experiment suggests that amino acid-based life is ubiquitous in our universe, although its varieties are not likely to have followed the particular, highly contingent and path-dependent, evolutionary trajectory found on Earth. Are many
Rodrick Wallace
core +1 more source
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
Investigating Impacts of Amino Acids on the Structural Stability of Anionic Biomembranes
ChemSystemsChem, Volume 7, Issue 2, March 2025.Glycine and lysine interact with the anionic membrane composed of POPC and POPG (1 : 1). Lysine partitions into the membrane and induces structural alterations, while the membrane remains impermeable to it. In contrast, glycine causes no physicochemical damage and permeates through the membrane.
Arslan Siddique +6 more
wiley +1 more source
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
Molecular fingerprints resolve affinities of Rhynie chert organic fossils
Nature Communications, 2023 It can be challenging to identify extinct organisms with morphology alone. Here, the authors use non-destructive Fourier Transform Infrared Spectroscopy to determine the molecular fingerprints of eukaryotes and prokaryotes from the 407 Ma Rhynie chert ...
C. C. Loron +5 more
doaj +1 more source