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Author Topic:   Self-Replicating Molecules - Life's Building Blocks (Part II)
CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 74 of 97 (811310)
06-06-2017 9:56 PM


Pssst! Don't tell the creationists
Pssst! Don't tell the creationists, but scientists don't have a clue how life began.
https://blogs.scientificamerican.com/...-clue-how-life-began
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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 77 of 97 (811782)
06-12-2017 7:20 AM


"Those who think scientists understand the issues of prebiotic chemistry are wholly misinformed. Nobody understands them. Maybe one day we will. But that day is far from today. It would be far more helpful (and hopeful) to expose students to the massive gaps in our understanding. They may find a firmer—and possibly a radically different—scientific theory.

The basis upon which we as scientists are relying is so shaky that we must openly state the situation for what it is: it is a mystery."

Animadversions of a Synthetic Chemist, James Tour

See also The Origin of Life: An Inside Story - 2016 Lectures (with James Tour)


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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 78 of 97 (811786)
06-12-2017 7:53 AM
Reply to: Message 11 by Coragyps
02-22-2010 8:50 PM


Re: New study - self replicating evolving RNA
Self-Sustained Replication of an RNA Enzyme
Tracey A. Lincoln, Gerald F. Joyce

They actually started with 3 carefully selected RNA strings and used one to join the other two small pieces into one piece (ligation), in a carefully controlled multi-step process. It's pretty much unlike anything likely to happen in nature.


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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 85 of 97 (816165)
07-31-2017 1:17 AM
Reply to: Message 84 by RAZD
07-24-2017 11:46 AM


Diversification of self-replicating molecules
Physicist Rob Sheldon made a pithy observation regarding the University of Groningen’s latest press release and the new paper by Sandownik, Mattia, Nowak and Otto: “If this paper were about anything but ‘peptides’, it would be called ‘crystallization’.”
The origin of abiotic species: Seven epic fails
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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 87 of 97 (816216)
07-31-2017 7:33 PM
Reply to: Message 86 by RAZD
07-31-2017 9:00 AM


Re: Diversification of self-replicating molecules
So the questions remain:

do we have self-replicating molecules? No
did they "evolve" and diversify into two different types of self-replicating molecules? No
does this "evolution" show the possibility of life's beginning? No

Inquiring minds want to know ... Which ones?

Edited by CRR, : image added


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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 90 of 97 (816258)
08-01-2017 8:16 PM
Reply to: Message 89 by dwise1
08-01-2017 10:27 AM


Re: Diversification of self-replicating molecules
There's a difference between cannot happen in nature and do not happen in nature.

We can produce many chemical reactions in the laboratory that do not happen in nature.


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CRR
Member (Idle past 473 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 93 of 97 (816265)
08-02-2017 4:02 AM
Reply to: Message 92 by Tangle
08-02-2017 3:05 AM


Re: Diversification of self-replicating molecules
Since abiogenesis has never been observed in nature or in the lab it remains mythical.
This message is a reply to:
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