Results 31 to 40 of about 2,479 (207)
The origin of life: what we know, what we can know and what we will never know [PDF]
Open Biology, 2013 The origin of life (OOL) problem remains one of the more challenging scientific questions of all time. In this essay, we propose that following recent experimental and theoretical advances in systems chemistry, the underlying principle governing the ...
Addy Pross, Robert Pascal
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Physical constraints on the likelihood of life on exoplanets [PDF]
, 2017 One of the most fundamental questions in exoplanetology is to determine whether a given planet is habitable. We estimate the relative likelihood of a planet's propensity towards habitability by considering key physical characteristics such as the role of
Lingam, Manasvi, Loeb, Abraham
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Life, 2019 The alkaline-hydrothermal-vent theory for the origin of life predicts the spontaneous reduction of CO2, dissolved in acidic ocean waters, with H2 from the alkaline vent effluent.
Victor Sojo +4 more
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Quantifying the Origins of Life on a Planetary Scale [PDF]
, 2015 A simple, heuristic formula with parallels to the Drake Equation is introduced to help focus discussion on open questions for the origins of life in a planetary context. This approach indicates a number of areas where quantitative progress can be made on
Cronin, Leroy, Scharf, Caleb
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AGU Advances, Volume 4, Issue 6, December 2023., 2023 Abstract Aqueous S[IV] species (HSO3− ${\mathrm{H}\mathrm{S}\mathrm{O}}_{3}^{-}$, SO32− ${\mathrm{S}\mathrm{O}}_{3}^{2-}$) derived from volcanogenic atmospheric SO2 are important to planetary habitability through their roles in proposed origins‐of‐life chemistry and influence on atmospheric sulfur haze formation, but the early cycling of S[IV] is ...
Sukrit Ranjan +8 more
wiley +1 more source
A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy
Galaxies, 2021 In the field of astrobiology, the precise location, prevalence, and age of potential extraterrestrial intelligence (ETI) have not been explicitly explored.
Xiang Cai +3 more
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Inference on the Nature and the Mass of Earth's Late Veneer from Noble Metals and Gases [PDF]
, 2001 Noble metals and gases are very sensitive to the late accretion to the Earth of asteroids and comets. We present mass balance arguments based on these elements that indicate that 0.7E22-2.7E22 kg of extraterrestrial bodies struck the Earth after core ...
Allègre +81 more
core +2 more sources
Fluid-Deposition of Rocks is Natural Model for Additive Production [PDF]
Interdisciplinary Description of Complex Systems, 2017 All created in the Nature is the result of natural technology. Solutions from Nature can be incentive for artificial, man's technology of living (biotechnology) and technology of abiogenesis.
Igor Čatić +4 more
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Evolution of Realistic Organic Mixtures for the Origins of Life through Wet–Dry Cycling
Sci, 2022 One of the challenges in understanding chemical evolution is the large number of starting organics and environments that were plausible on early Earth. Starting with realistic organic mixtures and using chemical analyses that are not biologically biased,
Kiernan Foster +4 more
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Fatty Acid Vesicles as Hard UV-C Shields for Early Life
Foundations, 2023 Theories on life’s origin generally acknowledge the advantage of a semi-permeable vesicle (protocell) for enhancing the chemical reaction–diffusion processes involved in abiogenesis.
Iván Lechuga, Karo Michaelian
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