The start of the Abiogenesis: Preservation of homochirality in proteins as a necessary and sufficient condition for the establishment of the metabolism [PDF]
arXiv, 2018 Biosystems contain an almost infinite amount of vital important details, which together ensure their life. There are, however, some common structures and reactions in the systems: the homochirality of carbohydrates and proteins, the metabolism and the genetics.
Søren Toxværd
arxiv +9 more sources
A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy [PDF]
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
doaj +6 more sources
An objective Bayesian analysis of life's early start and our late arrival. [PDF]
Proc Natl Acad Sci U S A, 2020 Life emerged on the Earth within the first quintile of its habitable window, but a technological civilization did not blossom until its last. Efforts to infer the rate of abiogenesis, based on its early emergence, are frustrated by the selection effect that if the evolution of intelligence is a slow process, then life's early start may simply be a ...
Kipping D.
europepmc +4 more sources
The requirement of cellularity for abiogenesis [PDF]
Computational and Structural Biotechnology Journal, 2021 The history of modern biochemistry started with the cellular theory of life. By putting aside the holistic protoplasmic theory, scientists of the XX century were able to advance the functional classification of cellular components significantly. The cell
Adriano Caliari, Jian Xu, Tetsuya Yomo
doaj +3 more sources
Dissipative Photochemical Abiogenesis of the Purines [PDF]
Entropy, 2022 We have proposed that the abiogenesis of life around the beginning of the Archean may have been an example of “spontaneous” microscopic dissipative structuring of UV-C pigments under the prevailing surface ultraviolet solar spectrum.
Claudeth Hernández, Karo Michaelian
doaj +4 more sources
Origin of the RNA World in Cold Hadean Geothermal Fields Enriched in Zinc and Potassium: Abiogenesis as a Positive Fallout from the Moon-Forming Impact? [PDF]
LifeThe ubiquitous, evolutionarily oldest RNAs and proteins exclusively use rather rare zinc as transition metal cofactor and potassium as alkali metal cofactor, which implies their abundance in the habitats of the first organisms.
Armen Y. Mulkidjanian +2 more
doaj +4 more sources
The Dissipative Photochemical Origin of Life: UVC Abiogenesis of Adenine [PDF]
Entropy, 2021 The non-equilibrium thermodynamics and the photochemical reaction mechanisms are described which may have been involved in the dissipative structuring, proliferation and complexation of the fundamental molecules of life from simpler and more common ...
Karo Michaelian
doaj +3 more sources
Bayesian analysis of the astrobiological implications of life's early emergence on Earth [PDF]
PNAS 109 (2011) 395-400, 2011 Life arose on Earth sometime in the first few hundred million years after the young planet had cooled to the point that it could support water-based organisms on its surface. The early emergence of life on Earth has been taken as evidence that the probability of abiogenesis is high, if starting from young-Earth-like conditions. We revisit this argument
Bayes +7 more
arxiv +3 more sources
The Informational Substrate of Chemical Evolution: Implications for Abiogenesis [PDF]
Life, 2019 A key aspect of biological evolution is the capacity of living systems to process information, coded in deoxyribonucleic acid (DNA), and used to direct how the cell works.
Andrés de la Escosura
doaj +2 more sources
On the Rate of Abiogenesis from a Bayesian Informatics Perspective [PDF]
, 2018 Life appears to have emerged relatively quickly on the Earth, a fact sometimes used to justify a high rate of spontaneous abiogenesis ($\lambda$) among Earth-like worlds. Conditioned upon a single datum - the time of earliest evidence for life ($t_{\mathrm{obs}}$) - previous Bayesian formalisms for the posterior distribution of $\lambda$ have ...
Jingjing Chen, David Kipping
arxiv +3 more sources