Re: OoL – out at first base?

Liste des GroupesRevenir à t origins 
Sujet : Re: OoL – out at first base?
De : admin (at) *nospam* 127.0.0.1 (Kerr-Mudd, John)
Groupes : talk.origins
Date : 16. Dec 2024, 21:23:35
Autres entêtes
Organisation : Dis
Message-ID : <20241216202335.579c9d505f3339f552f95aa5@127.0.0.1>
References : 1 2 3
User-Agent : Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32)
On Mon, 16 Dec 2024 10:38:13 -0800
Mark Isaak <specimenNOSPAM@curioustaxon.omy.net> wrote:

On 12/9/24 1:11 AM, jillery wrote:
On Mon, 9 Dec 2024 16:54:56 +1100, MarkE <me22over7@gmail.com> wrote:
 
We need prebiotic formation and supply of nucleotides for RNA world, and
other models at some stage. The scope of the problem of the supply of
these precursors is prone to underestimation.
>
Nucleotides are chemically challenging in terms of the prebiotic
synthesis and assembly of their three constituents of nitrogenous base,
sugar and phosphate group.
>
Harder again are the requirements for supply of these building blocks.
You need (eventually) all canonical bases in sufficient concentration,
purity, chirality, activation, distribution, location, etc.
>
But the greatest problem I think is this: time. How long must you
maintain the supply described above in order to assemble a
self-replicating RNA strand? And even if you managed that, how much more
time is needed before reaching a protocell capable of self-synthesising
nucleotides? One million years? One hundred million years?
>
A hypothised little warm pond with wetting/drying cycles (say) must
provide a far-from-equilibrium system...for a million years...or
hundreds of millions of years. You can’t pause the process, because any
developing polymers will fall apart and reset the clock.
>
What are the chances of that kind of geological and environmental
stability and continuity?
>
Therefore, the formation of an autonomous protocell naturalistically has
vanishingly small probability.
 
There were many warm little ponds, spread throughout the young Earth,
all multiplying that probability.  Try to keep that in mind.
 
Also factor in the unknown but probably large number of other earth-like
planets where similar processes could occur.  If things had gone a
little differently elsewhere, we might be calling a planet in a
completely different galaxy "Earth."
 
Also keep in mind that life has arisen on Earth somehow (I have seen it
here, after all).  Abiogenesis researchers are looking for the most
plausible mechanism for an event that was known to have happened.
Difficulties with earth-based biogenesis don't negate the fact that
panspermy and magic are, to all appearances, still less likely.
 
Not quite panspermy, but life could have started earlier in a more
favourable pond on Mars, then a chance bolide might have seeded an Earth
that was a bit more favourable later.
Alternatively,  having life exist deep down shelters it from heavy
impacts and gives it a chance to "re-emerge" after a deadly wipeout.

Getting any passing god interested in the project (and staying with
it) always seems as bit harder.

--
Bah, and indeed Humbug.


Date Sujet#  Auteur
9 Dec 24 * OoL – out at first base?127MarkE
9 Dec 24 +* Re: OoL – out at first base?18erik simpson
9 Dec 24 i`* Re: OoL – out at first base?17MarkE
9 Dec 24 i `* Re: OoL – out at first base?16erik simpson
10 Dec 24 i  +* Re: OoL – out at first base?3MarkE
10 Dec 24 i  i+- Re: OoL – out at first base?1erik simpson
10 Dec 24 i  i`- Re: OoL – out at first base?1jillery
11 Dec 24 i  +* Re: OoL – out at first base?2MarkE
11 Dec 24 i  i`- Re: OoL – out at first base?1erik simpson
11 Dec 24 i  `* Re: OoL - out at first base?10Martin Harran
11 Dec 24 i   +* Re: OoL - out at first base?7erik simpson
11 Dec 24 i   i`* Re: OoL - out at first base?6Martin Harran
11 Dec 24 i   i +- Re: OoL - out at first base?1erik simpson
11 Dec 24 i   i `* Re: OoL - out at first base?4LDagget
12 Dec 24 i   i  `* Re: OoL - out at first base?3Martin Harran
12 Dec 24 i   i   `* Re: OoL - out at first base?2LDagget
12 Dec 24 i   i    `- Re: OoL - out at first base?1DB Cates
11 Dec 24 i   `* Re: OoL - out at first base?2Ernest Major
11 Dec 24 i    `- Re: OoL - out at first base?1LDagget
9 Dec 24 +* Re: OoL – out at first base?9jillery
9 Dec 24 i+* Re: OoL – out at first base?6MarkE
9 Dec 24 ii+* Re: OoL ? out at first base?2aph
9 Dec 24 iii`- Re: OoL ? out at first base?1MarkE
9 Dec 24 ii`* Re: OoL – out at first base?3jillery
11 Dec 24 ii `* Re: OoL – out at first base?2MarkE
11 Dec 24 ii  `- Re: OoL – out at first base?1MarkE
16 Dec 24 i`* Re: OoL – out at first base?2Mark Isaak
16 Dec 24 i `- Re: OoL – out at first base?1Kerr-Mudd, John
9 Dec 24 +* Re: OoL – out at first base?7RonO
9 Dec 24 i`* Re: OoL – out at first base?6MarkE
10 Dec 24 i +- Re: OoL – out at first base?1RonO
10 Dec 24 i `* Re: OoL – out at first base?4erik simpson
11 Dec 24 i  `* Re: OoL - out at first base?3Martin Harran
11 Dec 24 i   `* Re: OoL - out at first base?2erik simpson
18 Dec 24 i    `- Re: OoL - out at first base?1jillery
10 Dec 24 +* Re: Ool - out at first base?90Bob Casanova
11 Dec 24 i`* Re: Ool - out at first base?89MarkE
13 Dec 24 i +* Re: Ool - out at first base?80Ernest Major
13 Dec 24 i i`* Re: Ool - out at first base?79erik simpson
14 Dec 24 i i `* Re: Ool - out at first base?78MarkE
14 Dec 24 i i  +* Re: Ool - out at first base?2erik simpson
14 Dec 24 i i  i`- Re: Ool - out at first base?1MarkE
14 Dec 24 i i  `* Re: Ool - out at first base?75Martin Harran
14 Dec 24 i i   `* Re: Ool - out at first base?74MarkE
14 Dec 24 i i    +* Re: Ool - out at first base?72Martin Harran
14 Dec 24 i i    i`* Re: Ool - out at first base?71MarkE
14 Dec 24 i i    i +* Re: Ool - out at first base?62Martin Harran
15 Dec 24 i i    i i`* Re: Ool - out at first base?61MarkE
15 Dec 24 i i    i i +* Re: Ool - out at first base?58Martin Harran
15 Dec 24 i i    i i i+- Re: Ool - out at first base?1Martin Harran
15 Dec 24 i i    i i i`* Re: Ool - out at first base?56MarkE
15 Dec 24 i i    i i i `* Re: Ool - out at first base?55Martin Harran
16 Dec 24 i i    i i i  `* Re: Ool - out at first base?54MarkE
16 Dec 24 i i    i i i   +* Re: Ool - out at first base?6Mark Isaak
18 Dec 24 i i    i i i   i`* Re: Ool - out at first base?5MarkE
18 Dec 24 i i    i i i   i `* Re: Ool - out at first base?4Mark Isaak
18 Dec 24 i i    i i i   i  +- Re: Ool - out at first base?1Martin Harran
19 Dec 24 i i    i i i   i  `* Re: Ool - out at first base?2MarkE
19 Dec 24 i i    i i i   i   `- Re: Ool - out at first base?1Mark Isaak
17 Dec 24 i i    i i i   `* Re: Ool - out at first base?47Martin Harran
17 Dec 24 i i    i i i    +* Re: Ool - out at first base?2erik simpson
17 Dec 24 i i    i i i    i`- Re: Ool - out at first base?1Martin Harran
18 Dec 24 i i    i i i    `* Re: Ool - out at first base?44MarkE
18 Dec 24 i i    i i i     `* Re: Ool - out at first base?43Martin Harran
18 Dec 24 i i    i i i      +- Re: Ool - out at first base?1Martin Harran
18 Dec 24 i i    i i i      +* Re: Ool - out at first base?2Ernest Major
19 Dec 24 i i    i i i      i`- Re: Ool - out at first base?1jillery
19 Dec 24 i i    i i i      `* Re: Ool - out at first base?39MarkE
19 Dec 24 i i    i i i       +* Re: Ool - out at first base?15Vincent Maycock
19 Dec 24 i i    i i i       i+* Re: Ool - out at first base?11MarkE
19 Dec 24 i i    i i i       ii`* Re: Ool - out at first base?10Vincent Maycock
19 Dec 24 i i    i i i       ii `* Re: Ool - out at first base?9MarkE
20 Dec 24 i i    i i i       ii  `* Re: Ool - out at first base?8Vincent Maycock
20 Dec 24 i i    i i i       ii   `* Re: Ool - out at first base?7MarkE
20 Dec 24 i i    i i i       ii    `* Re: Ool - out at first base?6Vincent Maycock
20 Dec 24 i i    i i i       ii     `* Re: Ool - out at first base?5MarkE
20 Dec 24 i i    i i i       ii      +* Re: Ool - out at first base?2Vincent Maycock
20 Dec 24 i i    i i i       ii      i`- Re: Ool - out at first base?1MarkE
21 Dec 24 i i    i i i       ii      +- Re: Ool - out at first base?1jillery
22 Dec 24 i i    i i i       ii      `- Re: Ool - out at first base?1Mark Isaak
19 Dec 24 i i    i i i       i`* Re: Ool - out at first base?3erik simpson
19 Dec 24 i i    i i i       i `* Re: Ool - out at first base?2Vincent Maycock
19 Dec 24 i i    i i i       i  `- Re: Ool - out at first base?1erik simpson
19 Dec 24 i i    i i i       +- Re: Ool - out at first base?1jillery
19 Dec 24 i i    i i i       +* Re: Ool - out at first base?21Martin Harran
19 Dec 24 i i    i i i       i+- Re: Ool - out at first base?1Martin Harran
19 Dec 24 i i    i i i       i`* Re: Ool - out at first base?19MarkE
19 Dec 24 i i    i i i       i +- Re: Ool - out at first base?1erik simpson
20 Dec 24 i i    i i i       i `* Re: Ool - out at first base?17Martin Harran
20 Dec 24 i i    i i i       i  +* Re: Ool - out at first base?2erik simpson
21 Dec 24 i i    i i i       i  i`- Re: Ool - out at first base?1MarkE
20 Dec 24 i i    i i i       i  `* Re: Ool - out at first base?14MarkE
21 Dec 24 i i    i i i       i   `* Re: Ool - out at first base?13Martin Harran
22 Dec 24 i i    i i i       i    `* Re: Ool - out at first base?12Martin Harran
22 Dec 24 i i    i i i       i     +* Re: Ool - out at first base?5William Hyde
23 Dec 24 i i    i i i       i     i`* Re: Ool - out at first base?4Martin Harran
23 Dec 24 i i    i i i       i     i +- Re: Ool - out at first base?1erik simpson
23 Dec 24 i i    i i i       i     i `* Re: Ool - out at first base?2William Hyde
23 Dec 24 i i    i i i       i     i  `- Re: Ool - out at first base?1erik simpson
22 Dec 24 i i    i i i       i     +- Re: Ool - out at first base?1jillery
23 Dec 24 i i    i i i       i     +* Re: Ool - out at first base?3erik simpson
24 Dec 24 i i    i i i       i     `* Re: Ool - out at first base?2MarkE
19 Dec 24 i i    i i i       `- Re: Ool - out at first base?1Mark Isaak
3 Jan 25 i i    i i `* Re: Ool - out at first base?2Burkhard
14 Dec 24 i i    i `* Re: Ool - out at first base?8DB Cates
16 Dec 24 i i    `- Re: Ool - out at first base?1Mark Isaak
13 Dec 24 i `* Re: Ool - out at first base?8Bob Casanova
10 Dec 24 `* Re: OoL – out at first base?2Kerr-Mudd, John

Haut de la page

Les messages affichés proviennent d'usenet.

NewsPortal