Current thinking is that early life forms used RNA alone, instead of DNA and RNA, in order to reproduce. The theory is, it would be marginally simpler for life to have got started that way.
Andy Ellington, on behalf of the RNA world origin of life hypothesis, tells us at U Berkeley’s Evolution 101: From Soup to Cells: “Origins is a huge knotty problem—but that doesn’t mean it’s an insoluble one.” It’s an interesting image because the knot problem, whether it is created by design or by chance, has this going for it: Patient untangling will usually work. That’s because the entire problem consists of one or several tangled strings. People more often lose patience than lose hope.
But an RNA origin of life is not like that. For one thing, opinions differ as to what would constitute a solution and how far we are from one. Some are convinced that much of the problem is solved already: A site for educators treats it almost as a historical problem, while calling it a hypothesis. And DNA from the beginning tells us:
RNA has great capability as a genetic molecule; it once had to carry on hereditary processes on its own. It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene. However, single-stranded RNA is rather unstable and is easily damaged by enzymes. By essentially doubling the existing RNA molecule, and using deoxyribose sugar instead of ribose, DNA evolved as a much more stable form to pass genetic information with accuracy.
Others say no, “ it is difficult to imagine how long RNA molecules could be formed initially by purely nonenzymatic means,” so they hypothesize precursors that have never been observed.
RNA world in general has never been observed. One supporter calls it “ the worst theory of the early evolution of life (except for all the others).” Indeed, the very same people who called RNA world “the molecular biologist’s dream” also called it “the prebiotic chemist’s nightmare.”
Science journalists, however, are undeterred by these difficulties, which is likely why the rest of us do not often hear about them. And this is the five-star hotel of origin of life theories. As I noted in the series over at Evolution News & Views,
So as mathematician David Berlinski notes, the basic problem is that RNA world proposals are “dominated by references to a number of unspecified but mysteriously potent forces and obscure conditional circumstances …” The technical term for that is magic. Nevertheless, RNA world is the best fully natural origin of life scenario today. More.
See also:
Is there a good reason to believe that life’s origin must be a fully natural event?
Does nature just “naturally” produce life?
Can all the numbers for life’s origin just happen to fall into place?
Welcome to “RNA world,” the five-star hotel of origin-of-life theories
The Science Fictions series at your fingertips (origin of life)
Earth’s crust cooled only 160 million years after solar system formed, says new Australian zircon study (Life could have started shortly afterward.)
Well some people believe that the fact there is a 5 nucleotide RNA that is a catalyst (using only the inner 3 nucleotides) means the RNA world is a fact. Seriously…
This following link has a nice overview of the classic self-replicating experiment in 1967 by Spiegelman in which the self-replicating RNA molecule got simpler and simpler in an artificial environment,(i.e. from 4500 nucleotides to the 220 nucleotide ‘Spiegelman’s monster’), instead of evolving any new complexity that might have led to self sustaining capability;
Yet today, in spite of experiments like the preceding, we have PhD chemists trying, through extreme effort, to ‘intelligently design’ the right information into the RNA nucleotides so that it may finally self replicate on its own and then they hope to finally let Darwinian processes ‘take over from there’, all the while ignoring the fact that Darwinian processes, in the raw, always reduce information.
In fact, if evolution were actually the truth about how life came to be on Earth then the only ‘life’ that would be around would be extremely small organisms with the highest replication rate, and with the most ‘mutational firepower’, since only they would be the fittest to survive in the dog eat dog world where blind pitiless evolution rules and only the ‘fittest’ are allowed to survive. The logic of this is nicely summed up here in this Dawkins interview:
i.e. Since successful reproduction is all that really matters on a neo-Darwinian view of things, how can anything but successful reproduction be realistically ‘selected’ for? Any other function besides reproduction, such as sight, hearing, thinking, etc.., would be highly superfluous to the primary criteria of successfully reproducing, and should, on a Darwinian view, be discarded as so much excess baggage since it would slow down successful reproduction.
notes:
Verse and Music:
Hey did discovery institute lie about the dissent of darwinism page that says: we are skeptical of the claims that natural selection can account for the complexity of life! I just saw a video were he said that these scientists did not sign this paper at all. Heres the video:
http://www.youtube.com/watch?v=UQx1U8eBz1o
http://m.youtube.com/watch?v=Ty1Bo6GmPqM
Is the Discovery Institute lying? One of the you tubers emailed a administrator asking about a scientist on the list but the administrator had never heard of him! IDK but I hope the discovery institute isn’t lying!
All scientists should be skeptical of that claim as there isn’t any evidence to support it.
So are all those scientists lying? Methinks so…
No Joe did you not see the video I think Discovery Institute put people on their without them knowing. Also in signature of the cell Stephen Meyer referred to 44 per reviewed papers thats when NCSE jumped in and contacted all 44 when 36 responded saying that their work did not debunk evolution at all!
http://ncse.com/creationism/ge.....y-appendix
What if there lying!
Methinks you have reading comprehension issues.
And no scientist can support the claims of evolutionism. No one can. Who cares about debunking something tat can’t be tested?
Joe I understand that no scientist can support evolution what im talking about is that the petition Discovery Institute here:
http://www.dissentfromdarwin.org
Has people who didnt sign the petition and that the Discovery Institute lied and put random people on there. In this video here:
http://m.youtube.com/watch?v=Ty1Bo6GmPqM
The video maker emailed one of the head administrators about one of the signers on the dissent from darwinism site that I linked above!
Heres the email the video maker sent:
We have all seen the Discovery Institutes list of scientists rejecting evolution. I analyzed the list, and emailed its signees. The truth of the matter is, DI lied repeatedly when constructing the list, and, by their own admission, even IF the numbers are skewed hugely in favor or the creationists, this still leaves .0027% of scientists in the US rejecting evolution.
Updates will be added periodically as I hear from these scientists.
Update #1) – Heard about Marko Horb. This is an email I just received from the head of the dept. where he was listed as working:
“Dear Whitney
I have been away on leave so have only just found your email.
I’m afraid I’ve never heard of Marko Horb. How is he connected to the University?
Best wishes
Gill
Gill Smith
Communications Officer
Department of Corporate Communications
University of Bath
BA2 7AY”
#2) Dr David A. DeWitt received a B.S. in biochemistry from Michigan State University and a Ph.D. in neuroscience from Case Western Reserve University. I was mistaken when I said “I think undergrad”.
#3) The figure I gave in the video is not intended to be used as a concrete % of scientists who reject evolution. Although it is close, I will specifically address this in my next video. That calculation was added moreso for amusement.
That’s a lie right there. That is not what the list is for.
But anyway, with any petition there are bound to be discrepancies. And I don’t trust anyone with an obvious agenda who starts an email with a lie.
Jaceli123:
That ain’t what I said. Pay attention- the petition refers to a specific form of evolution, ie blind watchmaker evolution.
That is most of the problem- people have no idea what is being debated. And that is because they just refuse to listen.
Thanks Joe for the understanding sorry for arguing with you!
Back on topic (thanks, Jaceli123):
RNA was proposed because the regular biotic world we see around us was deemed too improbable. But RNA-world still doesn’t solve any of the key issues relating to OOL, including the origin of information.
It is instructive to watch the RNA proponents and non-RNA proponents go at each other. Instructive because it highlights just how much of a failure all of the materialistic OOL theories are.
True. But it doesn’t mean it is soluble either. Additionally, there are lots of good reasons — beyond just calling it a “huge knotty problem” — to think that it is insoluble. At least in terms of a purely materialistic process operating within the time and resources of the known universe.