I think Nick Lane's metabolism-first theory, which he discusses in his
book "The Vital Question", is more plausible. There's good online talk
by Lane https://www.youtube.com/watch?v=PhPrirmk8F4.
Brent
On 7/6/2019 8:32 AM, 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
On 06-07-2019 10:48, 'Cosmin Visan' via Everything List wrote:
https://www.youtube.com/watch?v=r4sP1E1Jd_Y [1]
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[2].
Links:
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[1]
https://www.youtube.com/watch?v=r4sP1E1Jd_Y&fbclid=IwAR03cRVkBTOeYnPldcuLzFGCNiWqCR0dE5FENXF9JJtRlk75sbq5Dh2wxcY
[2]
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