RE: DNA Proves Existence of a Designer
November 30, 2018 at 6:12 am
(This post was last modified: November 30, 2018 at 6:25 am by Everena.)
(November 30, 2018 at 4:07 am)Everena Wrote: I've already read all about A Bio Genesis. An intelligent creator would stlll definitely be required, because their only theory of how life came to be is that it "just all happened naturally dude" That is vague and it means nothing. Also, abiogenesis has been criticisized and refuted by numerous scientists, just so you know.
1. They did not re-create the correct environment for the time period this would have happened in the Miller-Urey research experiments.
(November 30, 2018 at 4:47 am)Gwaithmir Wrote: Really? And what was the "correct" environment for that time period? How many possible environments were subjected to the Miller-Urey experiment since the 1950's and what were the results? Citations needed.
In 1953, a graduate student at the University of Chicago named Stanley Miller, along with his faculty advisor Harold Urey, performed experiments hoping to produce the building blocks of life under natural conditions on the early Earth.4 These “Miller-Urey experiments” intended to simulate lightning striking the gasses in the early Earth’s atmosphere. After running the experiments and letting the chemical products sit for a period of time, Miller discovered that amino acids — the building blocks of proteins — had been produced.
For decades, these experiments have been hailed as a demonstration that the “building blocks” of life could have arisen under natural, realistic Earthlike conditions,5 corroborating the primordial soup hypothesis. However, it has also been known for decades that the Earth’s early atmosphere was fundamentally different from the gasses used by Miller and Urey.
The atmosphere used in the Miller-Urey experiments was primarily composed of reducing gasses like methane, ammonia, and high levels of hydrogen. Geochemists now believe that the atmosphere of the early Earth did not contain appreciable amounts of these components. (Reducing gasses are those which tend to donate electrons during chemical reactions.) UC Santa Cruz origin-of-life theorist David Deamer explains this in the journal Microbiology & Molecular Biology Reviews:
This optimistic picture began to change in the late 1970s, when it became increasingly clear that the early atmosphere was probably volcanic in origin and composition, composed largely of carbon dioxide and nitrogen rather than the mixture of reducing gases assumed by the Miller-Urey model. Carbon dioxide does not support the rich array of synthetic pathways leading to possible monomers…
“Miller and Urey relied on a ‘reducing’ atmosphere, a condition in which molecules are fat with hydrogen atoms. As Miller showed later, he could not make organics in an ‘oxidizing’ atmosphere.”The article put it bluntly: “the early atmosphere looked nothing like the Miller-Urey situation.” Consistent with this, geological studies have not uncovered evidence that a primordial soup once existed.
There are good reasons to understand why the Earth’s early atmosphere did not contain high concentrations of methane, ammonia, or other reducing gasses. The earth’s early atmosphere is thought to have been produced by outgassing from volcanoes, and the composition of those volcanic gasses is related to the chemical properties of the Earth’s inner mantle. Geochemical studies have found that the chemical properties of the Earth’s mantle would have been the same in the past as they are today.10 But today, volcanic gasses do not contain methane or ammonia, and are not reducing.
A paper in Earth and Planetary Science Letters found that the chemical properties of the Earth’s interior have been essentially constant over Earth’s history, leading to the conclusion that “Life may have found its origins in other environments or by other mechanisms.”11 So drastic is the evidence against pre-biotic synthesis of life’s building blocks that in 1990 the Space Studies Board of the National Research Council recommended that origin of life investigators undertake a “reexamination of biological monomer synthesis under primitive Earthlike environments, as revealed in current models of the early Earth.”12
Because of these difficulties, some leading theorists have abandoned the Miller-Urey experiment and the “primordial soup” theory it is claimed to support. In 2010, University College London biochemist Nick Lane stated the primordial soup theory “doesn’t hold water” and is “past its expiration date.”13 Instead, he proposes that life arose in undersea hydrothermal vents. But both the hydrothermal vent and primordial soup hypotheses face another major problem.
Citations:
7. Jon Cohen, “Novel Center Seeks to Add Spark to Origins of Life,”, 270: 1925-1926 (December 22, 1995).
9. Antonio C. Lasaga, H. D. Holland, and Michael J. Dwyer, “Primordial Oil Slick,”, 174: 53-55 (October 1, 1971).
10. Kevin Zahnle, Laura Schaefer, and Bruce Fegley, “Earth’s Earliest Atmospheres,” Cold Spring Harbor Perspectives in Biology, 2(10): a004895 (October, 2010) (“Geochemical evidence in Earth’s oldest igneous rocks indicates that the redox state of the Earth’s mantle has not changed over the past 3.8 Gyr”); Dante Canil, “Vanadian in peridotites, mantle redox and tectonic environments: Archean to present,” Earth and Planetary Science Letters, 195:75-90 (2002).
13. Deborah Kelley, “Is It Time To Throw Out ‘Primordial Soup’ Theory?,” NPR (February 7, 2010).
2. Proteins don't bind under water, in fact they do just the opposite.
(November 30, 2018 at 4:47 am)Gwaithmir Wrote: Prove it. How is this relevant? Why would it be necessary? Citations needed.Assume for a moment that there was some way to produce simple organic molecules on the early Earth. Perhaps they did form a “primordial soup,” or perhaps these molecules arose near some hydrothermal vent. Either way, origin of life theorists must then explain how amino acids or other key organic molecules linked up to form long chains (polymers) like proteins (or RNA).
Chemically speaking, however, the last place you’d want to link amino acids into chains would be a vast water-based environment like the “primordial soup” or underwater near a hydrothermal vent. As the National Academy of Sciences acknowledges, “Two amino acids do not spontaneously join in water. Rather, the opposite reaction is thermodynamically favored.”14 In other words, water breaks protein chains back down into amino acids (or other constituents), making it very difficult to produce proteins (or other polymers) in the primordial soup.
Citation:
[14.] Committee on the Limits of Organic Life in Planetary Systems, Committee on the Origins and Evolution of Life, National Research Council, The Limits of Organic Life in Planetary Systems, p. 60 (Washington D.C.: National Academy Press, 2007).
(November 30, 2018 at 5:40 am)Gwaithmir Wrote: [quote='Everena' pid='1861229' dateline='1543569931']If you wish to postulate the existence of an intelligent creator, the burden of proof rests on your shoulders. It is not the responsibility for evolutionists to eliminate the alleged necessity of an intelligent creator.
First and foremost, before we discuss all the reasons other scientists have given for why it is not even possible, this is the part that matters to me and addresses my question. And don't try to pretend it is not their conclusion about how life came to be, because it absolutely is and that in no way eliminates the need for an intelligent creator.
But my question was what convinces you that an intelligent creator wasn't necessary "It just all happened naturally dude" is not all that convincing so I do not see how you can be convinced by it.