Origin(s) of life in the primitive Earth and chaos science. Probability of spontaneous emerging of a biosphere

Details Origin(s) of life in the primitive Earth and chaos science. Probability of spontaneous emerging of a biosphere Origin(s) of life in the primitive Earth and chaos science. Probability of spontaneous emerging of a biosphere

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496..171b&link_type=abstract

In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu

Biology

Biochemistry, Origin Of Life, Chaos

Scientific paper

Living structures may be described as beings in a self-organizing, fluctuating steady-state far from equilibrium: concepts arisen from the physics of chaos. The new model of living systems permits some considerations on the probability of the spontaneous creation of a biosphere. Even if it's not possible, at present, to know the way(s) from which life born, and plausible pathways of prebiotic evolution remain obscure, it's possible to consider the emerging of life as the transition from disorder to order in a population of mutually catalytic molecules undergoing random mutations (Dyson, 1982). Here we present data concerning the fractal structure of the oldest information polymers (tRNA of Archaea and viroid nucleotide sequences). Our data show high values of fractal dimension, placing these ancient polymers very close to the border between order and disorder. These data may be explained with the model presented by Dyson. The Dyson model, as well the thermodynamic considerations by Svirezhev (1999), gave the probability of emerging of a biosphere close to one, if we have enough time to produce sufficiently large number of attempts.

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