On Saturday, July 6, 2019 at 10:32:54 AM UTC-5, smitra wrote: > > https://arxiv.org/abs/1711.01945 > > > A followup article which focuses more on the mathematical issues is > under construction, the key points are: > > 1) In interstellar space, simple organic compounds captured in small ice > grains were subject to UV radiation and occasional heating due to > incident cosmic rays (CR). This induced a bond percolation process that > led to large clusters of organic molecules on a time scale of $\gtrsim > 10^6$ years. > > 2) On a proto-planet, such clusters can merge into loosely bound > superclusters. The deep interior of such superclusters can provide for > chemical micro-environments in which conventional models of abiogenesis > driven by cold-warm cycles can be considered. > > 3) Rapid fluctuations in the chemical potentials of certain chemical > compounds that can penetrate the supercluster, will be damped down. Long > term gradual and periodic changes then dominate, allowing any > biochemical systems inside the superclusters to more easily evolve > toward exploiting the conditions in their micro-environments, compared > to a similar system in the outside environment. > > 4) As the supercluster breaks up, the system experiences more of the > shorter term fluctuations that has more of a random character. The > system can then evolve to adapt to these fluctuations, when doing so > right from the start might not have worked. > > 5) On a small fraction of the superclusters these processes led to > microbes capable of surviving in the outside environment. > > 6) Microbes were transferred to Earth via a collision of a > microbe-containing proto-planet with the Moon. Fragments containing > microbes resulting from the giant impact rained down on the Earth. > > > Saibal > > > Interesting.
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