Results 91 to 100 of about 28,042 (247)

Between a Rock and a Soft Place: Biomass δ15N Values of Yellowstone Hot Spring Microbial Communities and Their Potential for Preservation in the Rock Record

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 8, August 2025.
Abstract Nitrogen isotope (δ15N) values in ancient rocks have been used to interpret the presence of nitrogen metabolisms and fixed N availability across the Archean and Paleoproterozoic eons. However, how δ15N signals produced by nitrogen metabolisms of microbial communities, the impact of the geochemical environments they live in on those signals ...
J. R. Havig, T. L. Hamilton
wiley   +1 more source

Astrobiology: An Introduction [PDF]

American Journal of Physics, 2016
This article reviews Astrobiology: An Introduction. by Alan Longstaff  422 pp. , 2015. Price: $89.95 (hardback). ISBN 978-1-4398-7576-6.
openaire   +2 more sources

Analysis of Microbial Diversity and Evidence of Contamination at a Mars Analogue Habitat

Environmental Microbiology Reports, Volume 17, Issue 4, August 2025.
We assessed the potential of a crewed mission to Mars to microbially contaminate the surface by studying a terrestrial analogue facility, the Mars Desert Research Station. DNA sequencing of interior swabs and an external soil sample allowed us to characterise the microbiomes present.
Mara Leite, Dragana Dobrijevic, Michael C. Macey, Mamatha Maheshwarappa, John Ward, Lewis Dartnell   +5 more
wiley   +1 more source

Teaching Astrobiology Online [PDF]

Symposium - International Astronomical Union, 2004
As part of Swinburne Astronomy Online (SAO), we run an online short course entitled Searching for Extrasolar Planets and Extraterrestrial Life. The main aim of the short course is to act as a “feeder” into our graduate programs and allow students to trial online education while exploring one of the new hot topics of astronomy – astrobiology.I will ...
openaire   +1 more source

Physicochemical Salt Solution Parameters Limit the Survival of Planococcus halocryophilus in Martian Cryobrines

Frontiers in Microbiology, 2020
Microorganisms living in sub-zero environments can benefit from the presence of dissolved salts, as they significantly increase the temperature range of liquid water by lowering the freezing point.
Annemiek C. Waajen, Annemiek C. Waajen, Jacob Heinz, Alessandro Airo, Dirk Schulze-Makuch, Dirk Schulze-Makuch, Dirk Schulze-Makuch, Dirk Schulze-Makuch   +7 more
doaj   +1 more source

Internal Heat Flux and Energy Imbalance of Uranus

Geophysical Research Letters, Volume 52, Issue 14, 28 July 2025.
Abstract With its extreme axial tilt, Uranus' radiant energy budget (REB) and internal heat flux remain among the most intriguing mysteries in our solar system. By combining observations with modeling, we present the global REB over a complete orbital period (1946–2030), revealing significant seasonal variations.
Xinyue Wang, Liming Li, Michael Roman, Xi Zhang, Xun Jiang, Patrick Fry, Cheng Li, Gwenael Milcareck, Agustin Sanchez‐Lavega, Santiago Perez‐Hoyos, Ricardo Hueso, Tristan Guillot, Conor Nixon, Ulyana Dyudina, Robert West, Matthew Kenyon   +15 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, Carr, Christopher, Chen, Huan, Cleaves II, H. James, Fujii, Yuka, Furukawa, Yoshihiro, Genda, Hidenori, Gillams, Richard J., Giri, Chaitanya, Hamano, Keiko, Jia, Tony Z., Kameda, Shingo, Krishnamurthy, Ramanarayanan, Meinert, Cornelia, Meringer, Markus, Paknikar, Kishore, Rajamani, Sudha, Shivaji, Sisinthy, Steele, Andrew, Taniguchi, Masateru, Usui, Tomohiro, Yabuta, Hikaru, Yamagishi, Akihiko   +22 more
core  

Habitability of Super-Earth Planets around Main-Sequence Stars including Red Giant Branch Evolution: Models based on the Integrated System Approach

, 2011
In a previous study published in Astrobiology, we focused on the evolution of habitability of a 10 M_E super-Earth planet orbiting a star akin to the Sun.
C. Bounama, Cuntz, K.-P. Schröder, M. Cuntz, Maeder, Noack, S. Franck, Schaller, W. von Bloh   +8 more
core   +1 more source

On the Stability of Deinoxanthin Exposed to Mars Conditions during a Long-Term Space Mission and Implications for Biomarker Detection on Other Planets

Frontiers in Microbiology, 2017
Outer space, the final frontier, is a hostile and unforgiving place for any form of life as we know it. The unique environment of space allows for a close simulation of Mars surface conditions that cannot be simulated as accurately on the Earth. For this
Stefan Leuko, Maria Bohmeier, Franziska Hanke, Ute Böettger, Elke Rabbow, Andre Parpart, Petra Rettberg, Jean-Pierre P. de Vera   +7 more
doaj   +1 more source

The Impact of the Temporal Distribution of Communicating Civilizations on their Detectability

, 2017
We use a statistical model to investigate the detectability (defined by the requirement that they are in causal contact with us) of communicating civilizations within a volume of the universe surrounding our location.
Balbi, Amedeo
core   +1 more source