Results 81 to 90 of about 28,042 (247)

Detecting Biosignatures in Complex Molecular Mixtures From Pyrolysis‐Gas Chromatography‐Mass Spectrometry Data Using Machine Learning

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 3, September 2025.
Abstract Understanding how measured molecular signals can distinguish the chemistry of life from the chemistry of the nonliving world is a central focus of astrobiology and paleobiology. We train and compare several machine learning (ML) classification models on data from pyrolysis‐gas chromatography‐mass spectrometry (py‐GC‐MS)—a widely available ...
Grethe Hystad, H. James Cleaves II, Collin A. Garmon, Michael L. Wong, Anirudh Prabhu, George D. Cody, Robert M. Hazen   +6 more
wiley   +1 more source

M Dwarf Planet Habitability [PDF]

, 2017
The habitability of M dwarf planets has been debated greatly, as their parent stars possess both beneficial and detrimental qualities for the development of life.
Koenigs, Ben
core   +1 more source

Galactic Punctuated Equilibrium: How to Undermine Carter's Anthropic Argument in Astrobiology

, 2009
We investigate a new strategy which can defeat the (in)famous Carter's "anthropic" argument against extraterrestrial life and intelligence. In contrast to those already considered by Wilson, Livio, and others, the present approach is based on relaxing ...
Annis J., Branislav Vukotić, Brin G.D., Dragićević I., Ivana Dragićević, Milan M. Ćirković, Pavlov A.A.   +6 more
core   +1 more source

Space Economy and Sustainability: A Systematic Review

Sustainable Development, Volume 33, Issue 4, Page 4922-4959, August 2025.
ABSTRACT The space economy is booming thanks to the increasing investment of government agencies, private companies, and venture capitalists. From the beginning of the New Space era, the array of actors involved in the development of technologies for extra‐terrestrial activities has increased, as well as the downstream applications that foster ...
Marianna Valente, Federico Caviggioli, Lara Agostini   +2 more
wiley   +1 more source

Astrobiological Complexity with Probabilistic Cellular Automata

, 2012
Search for extraterrestrial life and intelligence constitutes one of the major endeavors in science, but has yet been quantitatively modeled only rarely and in a cursory and superficial fashion.
A Ilachinski, AA Pavlov, AH Knoll, AJ Wood, AR Wallace, B Carter, B Carter, B Vukotić, B Vukotić, Branislav Vukotić, BS Soares-Filho, C Adami, C Cotta, C Maccone, C Maccone, C Sagan, C Walters, CF Chyba, CG Langton, CH Bennett, CH Lineweaver, CH Lineweaver, CH Lineweaver, CS Cockell, CS Cockell, CS Cockell, D Grinspoon, DC Dennett, DH Forgan, DJ Asher, DJ Des Marais, DM Raup, DR Gies, DW McShea, EM Jones, EM Leitch, F Drake, FJ Dyson, G Gonzalez, G Grinstein, G Radick, GA Landis, GD Brin, GG Simpson, GV Levin, HJ Rocha-Pinto, HJ Rocha-Pinto, I Fry, J Binney, J Matese, J Pérez-Mercader, JA Ball, JJ Matese, K Sterelny, KS Carslaw, M Batty, M Gardner, MAC Perryman, MD Hill, Milan M. Ćirković, MJ Burchell, MJ Burchell, MJ Fogg, MJ Rees, MK Wallis, MK Wallis, MM Ćirković, MM Ćirković, MM Ćirković, MM Ćirković, N Duric, NK Petersen, NS Kardashev, P Bak, P Ward, PCW Davies, PMC Oliveira de, R Bjørk, R Dawkins, RA Carrigan, RA Freitas Jr, RD Smith, S Conway Morris, S Conway Morris, S Dick, S Hoya White, S Webb, S Wolfram, S Wolfram, SG Wallenhorst, SJ Dick, SJ Gould, SJ Gould, SJ Gould, SVM Clube, V Clube, W Borkowski, WI Newman, WM Napier, WM Napier   +99 more
core   +1 more source

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, Joyce M McBeth, Marco eBlothe, Elizabeth Maria Percak-Dennett, Emily J Fleming, Rebecca R Holyoke, George W. Luther, David eEmerson   +7 more
doaj   +1 more source

Properties and Dispersal of a Hydrothermal Plume in a Weakly Stratified Under‐Ice Environment

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 8, August 2025.
Abstract The Aurora vent field (82°53.83′N, 6°15.32′W) is located in the weakly stratified Arctic Ocean under perennial ice cover at the western edge of the ultraslow‐spreading Gakkel Ridge, the slowest spreading mid‐ocean ridge on Earth. Here, we report data on the dispersal of the proximal hydrothermal plume in this extreme environment.
Maren Walter, Andreas Türke, Alexander Diehl, Christopher R. German, Christian Mertens, Jonathan Mette, Patrick Monien, Simon Prause, Jürgen Sültenfuß, Wolfgang Bach, Vera Schlindwein, Antje Boetius   +11 more
wiley   +1 more source

Is the Pale Blue Dot unique? Optimized photometric bands for identifying Earth-like exoplanets

, 2016
The next generation of ground and space-based telescopes will image habitable planets around nearby stars. A growing literature describes how to characterize such planets with spectroscopy, but less consideration has been given to the usefulness of ...
Arney, Giada, Catling, David C., Charnay, Benjamin, Krissansen-Totton, Joshua, Meadows, Victoria, Robinson, Tyler D., Schwieterman, Edward W.   +6 more
core   +1 more source

Mineralogical and Chemical Mapping of Martian Meteorite SaU 008 Using Deep UV Raman and Fluorescence Spectroscopy on Earth and Mars

Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.
Abstract The NASA Mars 2020 mission Perseverance rover carries a piece of Martian meteorite Sayh al Uhaymir (SaU) 008 as part of the calibration payload for the SHERLOC science instrument. We report SHERLOC observations of the SaU 008 flight piece over the first 1,000 sols of the mission and compare them to measurements done prior to launch, showing ...
Joseph Razzell Hollis, Kelsey Moore, Marc Fries, Cindy Broderick, Yannick Buret, Rohit Bhartia, Teresa Fornaro, Trevor Graff, Kevin P. Hand, Keyron Hickman‐Lewis, Ryan Jakubek, Carina Lee, Francis M. McCubbin, Richard V. Morris, Ashley Murphy, Sunanda Sharma, Caroline Smith, Andrew Steele, Kyle Uckert   +18 more
wiley   +1 more source

Motivation, demographics, and engagement during COVID-19 in an astrobiology massive open online course

Physical Review Physics Education Research
Massive 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, Molly N. Simon, Sanlyn Buxner, Matthew Wenger, Chris Impey   +4 more
doaj   +1 more source