Although there is an element of panspermia in this proposal, as I
explain in the conclusion, the panspermia element is a side issue as I
need to explain how something cooked up in space ends up on Earth. The
main problem to be solved is how to get from building blocks to
machines. The problem has actually little to do with biochemistry, it's
a mathematical problem because you would always stumble on that problem
in any model of artificial chemistry. The solution is percolation in 3
dimensions to get from building blocks to a large number of
micro-environments with features in the interior that can act as
catalysts. Each micro-environment breaks symmetries in different ways,
some are are better than others for harboring an RNA world than others.
On 06-07-2019 20:11, spudboy100 via Everything List wrote:
Panspermia for sure. Did it work that way in the universe? Maybe. I am
guessing we'd require a close-by stellar activity place where life all
started, and thus, floomed it's way to a hungry earth? My suspicion
would be if we'd see life on the other planets in our solar system,
your reasoning would be spot-on! Since life appears sketchy around
these parts, I am no enthusiast of panspermia. It made for a great
tale in Stephen Baxter's Evolution (2002), and one of Larry Niven's
short tales however. (The Green Marauder).
-----Original Message-----
From: smitra <smi...@zonnet.nl>
To: everything-list <everything-list@googlegroups.com>
Sent: Sat, Jul 6, 2019 11:32 am
Subject: Re: The origin of life has not been explained
https://arxiv.org/abs/1711.01945 [1]
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 [2][1]
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[3]
[2].
Links:
------
[1]
https://www.youtube.com/watch?v=r4sP1E1Jd_Y&fbclid=IwAR03cRVkBTOeYnPldcuLzFGCNiWqCR0dE5FENXF9JJtRlk75sbq5Dh2wxcY
[4]
[2]
https://groups.google.com/d/msgid/everything-list/a43531f9-d34c-4806-97f0-7665befc7e95%40googlegroups.com?utm_medium=email&utm_source=footer
[5]
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[6].
Links:
------
[1] https://arxiv.org/abs/1711.01945
[2] https://www.youtube.com/watch?v=r4sP1E1Jd_Y
[3]
https://groups.google.com/d/msgid/everything-list/a43531f9-d34c-4806-97f0-7665befc7e95%40googlegroups.com
[4]
https://www.youtube.com/watch?v=r4sP1E1Jd_Y&fbclid=IwAR03cRVkBTOeYnPldcuLzFGCNiWqCR0dE5FENXF9JJtRlk75sbq5Dh2wxcY
[5]
https://groups.google.com/d/msgid/everything-list/a43531f9-d34c-4806-97f0-7665befc7e95%40googlegroups.com?utm_medium=email&utm_source=footer
[6]
https://groups.google.com/d/msgid/everything-list/272321496.3596453.1562436694561%40mail.yahoo.com?utm_medium=email&utm_source=footer
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