Results 61 to 70 of about 33,014 (253)

Astrobiology and astrophilosophy: subsuming or bifurcating diciplines? [PDF]

, 2019
Initially, astrobiology subsumed into philosophy. However, philosophy has increasingly subsumed into astrobiology concurrent with it steadily becoming an observational and experimental activity that mainly focuses on the link between life and the cosmos,
von Hegner, Ian
core  

Modeling pN2 through Geological Time: Implications for Planetary Climates and Atmospheric Biosignatures [PDF]

, 2016
Nitrogen is a major nutrient for all life on Earth and could plausibly play a similar role in extraterrestrial biospheres. The major reservoir of nitrogen at Earth's surface is atmospheric N2, but recent studies have proposed that the size of this ...
Buick, R., Johnson, B., Kipp, M. A., Koehler, M. C., Schwieterman, E. W., Stüeken, E. E.   +5 more
core   +2 more sources

The Origin of Life from Primordial Planets

, 2010
The origin of life and the origin of the universe are among the most important problems of science and they might be inextricably linked. Hydro-gravitational-dynamics (HGD) cosmology predicts hydrogen-helium gas planets in clumps as the dark matter of ...
Gibson, Carl H., Schild, Rudolph E., Wickramasinghe, N. C.   +2 more
core   +1 more source

Early evolution of purple retinal pigments on Earth and implications for exoplanet biosignatures

, 2018
We propose that retinal-based phototrophy arose early in the evolution of life on Earth, profoundly impacting the development of photosynthesis and creating implications for the search for life beyond our planet.
DasSarma, Shiladitya, Schwieterman, Edward W.   +1 more
core   +1 more source

The Water Activity of Mars-relevant Multicomponent Brines: The Changing Influence of Perchlorate on Habitability over Time

The Planetary Science Journal, 2023
Low water activity limits the habitability of aqueous environments, and salts present on Mars are known to reduce water activity. As environmental brines are not pure solutions of a single salt, predicting their water activity is difficult without direct
Adam H. Stevens, Charles S. Cockell
doaj   +1 more source

Physicochemical Parameters Limiting Growth of Debaryomyces hansenii in Solutions of Hygroscopic Compounds and Their Effects on the Habitability of Martian Brines

Life, 2021
The availability of liquid water is a prerequisite for all lifeforms on Earth. In hyperarid subzero environments like the Dry Valleys in Antarctica or the near-subsurface of Mars liquid water might be provided temporarily by hygroscopic substances that ...
Jacob Heinz, Vita Rambags, Dirk Schulze-Makuch   +2 more
doaj   +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 Lick-Carnegie Exoplanet Survey: A Saturn-Mass Planet in the Habitable Zone of the Nearby M4V Star HIP 57050 [PDF]

, 2010
Precision radial velocities from Keck/HIRES reveal a Saturn-mass planet orbiting the nearby M4V star HIP 57050. The planet has a minimum mass of 0.3 Jupiter-mass, an orbital period of 41.4 days, and an orbital eccentricity of 0.31.
Butler, R. Paul, Haghighipour, Nader, Henry, Gregory W., Laughlin, Greg, Meschiari, Stefano, Rivera, Eugenio J., Vogt, Steven S.   +6 more
core   +3 more sources

The Italian National Project of Astrobiology—Life in Space—Origin, Presence, Persistence of Life in Space, from Molecules to Extremophiles

Astrobiology, 2020
The ‘‘Life in Space’’ project was funded in the wake of the Italian Space Agency’s proposal for the development of a network of institutions and laboratories conceived to implement Italian participation in space astrobiology experiments.
S. Onofri, N. Balucani, V. Barone, P. Benedetti, D. Billi, A. Balbi, J. Brucato, B. Cobucci-Ponzano, G. Costanzo, N. L. Rocca, M. Moracci, R. Saladino, G. Vladilo   +12 more
semanticscholar   +1 more source

Astrobiology in philosophy or philosophy in astrobiology?

Cosmos and history, 2022
The purpose of this paper is to see how the creation of astrophilosophy could better emphasize the role of philosophy today, and would it behave as a side-by-side major philosophical discipline or a complement to the current philosophical disciplines, for example, bringing new light into metaphysics, epistemology, ethics, or philosophy of mind.
openaire   +2 more sources