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Polemics

The origin of life, part 1 of 2: the building blocks of life

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The origin of life

There are two problems related to the origin of the first living cell, on atheism:

  1. The problem of getting the building blocks needed to create life – i.e. the amino acids
  2. The problem of creating the functional sequences of amino acids and proteins that can support the minimal operations of a simple living cell

Normally, I concede the first problem and grant the atheist all the building blocks he needs. This is because step 2 is impossible. There is no way, on atheism, to form the sequences of amino acids that will fold up into proteins, and then to form the sequences of proteins that can be used to form everything else in the cell, including the DNA itself. But that’s tomorrow’s topic.

Today, let’s take a look at the problems with step 1.

The problem of getting the building blocks of life

Now you may have heard that some scientists managed to spark some gasses to generate most of the 20 amino acids found in living systems. These experiments are called the “Miller-Urey” experiments.

The IDEA center has a nice summary of origin-of-life research that explains a few of the main problems with step 1.

Miler and Urey used the wrong gasses:

Miller’s experiment requires a reducing methane and ammonia atmosphere,11, 12 however geochemical evidence says the atmosphere was hydrogen, water, and carbon dioxide (non-reducing).15, 16 The only amino acid produced in a such an atmosphere is glycine (and only when the hydrogen content is unreasonably high), and could not form the necessary building blocks of life.11

Miller and Urey didn’t account for UV of molecular instability:

Not only would UV radiation destroy any molecules that were made, but their own short lifespans would also greatly limit their numbers. For example, at 100ºC (boiling point of water), the half lives of the nucleic acids Adenine and Guanine are 1 year, uracil is 12 years, and cytozine is 19 days20 (nucleic acids and other important proteins such as chlorophyll and hemoglobin have never been synthesized in origin-of-life type experiments19).

Miller and Urey didn’t account for molecular oxygen:

We all have know ozone in the upper atmosphere protects life from harmful UV radiation. However, ozone is composed of oxygen which is the very gas that Stanley Miller-type experiments avoided, for it prevents the synthesis of organic molecules like the ones obtained from the experiments! Pre-biotic synthesis is in a “damned if you do, damned if you don’t” scenario. The chemistry does not work if there is oxygen because the atmosphere would be non-reducing, but if there is no UV-light-blocking oxygen (i.e. ozone – O3) in the atmosphere, the amino acids would be quickly destroyed by extremely high amounts of UV light (which would have been 100 times stronger than today on the early earth).20, 21, 22 This radiation could destroy methane within a few tens of years,23 and atmospheric ammonia within 30,000 years.15

And there were three other problems too:

At best the processes would likely create a dilute “thin soup,”24 destroyed by meteorite impacts every 10 million years.20, 25 This severely limits the time available to create pre-biotic chemicals and allow for the OOL.

Chemically speaking, life uses only “left-handed” (“L”) amino acids and “right-handed” (“R)” genetic molecules. This is called “chirality,” and any account of the origin of life must somehow explain the origin of chirality. Nearly all chemical reactions produce “racemic” mixtures–mixtures with products that are 50% L and 50% R.

Two more problems are not mentioned in the article. A non-peptide bond anywhere in the chain will ruin the chain. You need around 200 amino acids to make a protein. If any of the bonds is not a peptide bond, the chain will not work in a living system. Additionally, the article does not mention the need for the experimenter to intervene in order to prevent interfering cross-reactions that would prevent the amino acids from forming.

The progress of science

As science has progressed, the discoveries have proved out the need for a Creator and Designer in every area – the big bang, cosmic, galactic and stellar fine-tuning, the Cambrian explosion, etc…. and even the origin of life.

“More than 30 years of experimentation on the origin of life in the fields of chemical and molecular evolution have led to a better perception of the immensity of the problem of the origin of life on Earth rather than to its solution. At present all discussions on principal theories and experiments in the field either end in stalemate or in a confession of ignorance. New lines of thinking and experimentation must be tried.”

(Dose, Klaus, “The Origin of Life: More Questions Than Answers,” Interdisciplinary Science Reviews, Vol. 13, No. 4, 1988, p.348.)

Meanwhile, atheists are left to have blind faith that the progress scientists have made during decades of research will be miraculously overturned by new evidence that their beloved unobservable Flying Spaghetti Monster, (peas be upon him), did it. Hey! Don’t blaspheme against the non-supernatural powers of his noodly appendage! (Two Ph.Ds in biology will not save you from the wrath of the Darwoid cultists!)

To see how bad this gets for atheists, watch this video where Dawkins says that unobservable aliens evolved somewhere else and then seeded the Earth with life. He has no evidence that these aliens did evolve (no fossil record), and even worse, he does not know whether they even exist. Nevertheless, that is the state of atheism today – an unobservable Flying Spaghetti Monster evolved somewhere else and seeded the Earth with life.

What else could have happened?

Further study

One of my favorite resources on the origin of life is this interview from the University of California with former atheist and origin of life researcher Dean Kenyon. Kenyon, a professor of Biology at San Francisco State University, wrote the textbook on “chemical evolution”, which is the view that chemicals can arrange themselves in order to create the first living cell, without intervention.

This interview from the University of California with another origin of life researcher, Charles Thaxton, is also one of my favorites.

You’ll need Quicktime to see the videos, or buy the videos from ARN. (Kenyon, Thaxton) I have both of them – they rock!

Commentary

Scientific American assesses naturalistic explanations for the origin of life

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From Scientific American. (H/T Letitia via Mary)

Excerpt:

As recently as the middle of the 20th century, many scientists thought that the first organisms were made of self-replicating proteins. After Francis Crick and James Watson showed that DNA is the basis for genetic transmission in the 1950s, many researchers began to favor nucleic acids over proteins as the ur-molecules. But there was a major hitch in this scenario. DNA can make neither proteins nor copies of itself without the help of catalytic proteins called enzymes. This fact turned the origin of life into a classic chicken-or-egg puzzle: Which came first, proteins or DNA?

RNA, DNA’s helpmate, remains the most popular answer to this conundrum, just as it was when I wrote “In the Beginning…” Certain forms of RNA can act as their own enzymes, snipping themselves in two and splicing themselves back together again. If RNA could act as an enzyme, then it might be able to replicate itself without help from proteins. RNA could serve as gene and catalyst, egg and chicken.

But the “RNA-world” hypothesis remains problematic. RNA and its components are difficult to synthesize under the best of circumstances, in a laboratory, let alone under plausible prebiotic conditions. Once RNA is synthesized, it can make new copies of itself only with a great deal of chemical coaxing from the scientist. Overbye notes that “even if RNA did appear naturally, the odds that it would happen in the right sequence to drive Darwinian evolution seem small.”

The RNA world is so dissatisfying that some frustrated scientists are resorting to much more far out—literally—speculation. The most startling revelation in Overbye’s article is that scientists have resuscitated a proposal once floated by Crick. Dissatisfied with conventional theories of life’s beginning, Crick conjectured that aliens came to Earth in a spaceship and planted the seeds of life here billions of years ago. This notion is called directed panspermia. In less dramatic versions of panspermia, microbes arrived on our planet via asteroids, comets or meteorites, or drifted down like confetti.

John Horgan is not a Christian, nor even a theist. This is the state of the art if you are a naturalist.

Basically, you have at most a couple hundred million years from the time the Earth cools to the appearance of first life. You are unlikely to get one measly protein without an intelligence arranging the amino acids. This is assuming we spot you a favorable environment for creating amino acids without intervention. And then there would still be the problem of sequencing the proteins.

Atheists oppose science and evidence

Theists support science and evidence

Polemics

What does the Bible mean when it uses the word “faith”?

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From Tektonics.

Here’s a popular view of faith that says that people believe weird things by acts of will:

Consider these three views:

  1. A “faith healer” named Benny Pophagin offers to heal Joe of his lumbago. Benny lays hands on Joe and prays, but the lumbago remains. Benny waves Joe away, saying, “This is your problem. You don’t have enough faith.”
  2. A Christian faces several objections to his beliefs that he cannot answer. He says, “I don’t care what people say, I still have faith.”
  3. The famous skeptic Mark Twain said, “Faith is believing what you know ain’t so.”

Can anyone guess what is wrong with this picture?

The answer is that all of these examples offer an incorrect definition or understanding of what Biblical faith is all about. Twain’s own definition does correctly (with some negative emphasis) embody the way “faith” is understood by far too many today — but it does not match the Biblical definition of that word, and as the first two examples suggest, “faith” is a badly misunderstood concept in the church at large.

Atheists and many Christians seem to agree on that view of faith… but is that view Biblical?

Here’s an excerpt from the article showing the Biblical view of faith:

The Greek word behind “faith” in the NT is pistis. As a noun, pistis is a word that was used as a technical rhetorical term for forensic proof.

Examples of this usage are found in the works of Aristotle and Quintiallian, and in the NT in Acts 17:31:

Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead.

If you are used to thinking of “faith” in terms of our first two examples, this will assuredly come as a surprise. The raising of Christ is spoken of here as a proof that God will judge the world. However, if we think about the missionary preaching of the book of Acts, this makes perfect sense and teaches us a certain lesson.

Here is more food for thought: Is there anyplace in the NT where we can find someone giving their “personal testimony”?

The answer is yes — but it is in Phil. 3, where Paul gives his personal testimony about his former life, when writing to fellow Christians. He does not use it in a missionary setting to unbelievers.

Indeed, one will find nowhere in the NT an example of missionaries, or anyone, giving their personal testimony.

This is for good reason. The ancients conceived of personality as static; the way you were born is the way you stayed. Personal change was not a focus, because it was thought impossible. This is why the church remained suspicious of Paul even after his conversion, and until Barnabas (who probably knew Paul previously) testified on his behalf.

But note well: The following is not the sort of thing one will find in the NT:

Acts 2:48-52 And Peter arose and said, Men and brethren, I testify to you that whereas I formerly smoked mustard leaves, drank wine, cursed daily, and smelled moreover of fish, when the Lord Jesus Christ entered my heart I became clean. Now I no longer smoke, I no longer drink, my language is no longer filthy, and I bathe daily. Praise the Lord!

On the contrary.Here is what we do find in the missionary preaching of the NT:

Acts 2:22-36 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know: Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain: Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it. For David speaketh concerning him, I foresaw the Lord always before my face, for he is on my right hand, that I should not be moved…Men and brethren, let me freely speak unto you of the patriarch David, that he is both dead and buried, and his sepulchre is with us unto this day. Therefore being a prophet, and knowing that God had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Christ to sit on his throne; He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption. This Jesus hath God raised up, whereof we all are witnesses. Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear… Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.

Peter’s primary appeal here was threefold:

  1. He appealed to the evidence of the wonders and signs performed by Jesus;
  2. he appealed to the empty tomb,
  3. and he appealed to fulfillment of OT prophecy.

In short, his appeals were evidentiary. One of course might wish to dispute the validity of the evidence, but in context this is beside the point. The point is that Peter grounded belief in Christianity on evidence — or, as the definition of pistis in Acts 17:31 would put it, proofs.

If Paul and Peter would around today, Paul would have a Ph.D in Astrophysics (Romans 1) and Peter would have a Ph.D in Ancient History (Acts 2). And they would be using good theistic arguments to defend belief in God, and historical evidence to defend the resurrection. Because Christianity is all about the evidence. Always has been, always will be. We do not offer Christianity to people on the basis of feelings or life enhancement. It is true, and that’s all.

Here is my article on whether the Bible opposes logic and evidence. And one about why some (weird) Christians don’t defend their faith.

UPDATE: Michael sends me this video from Greg Koukl:

And notes that Greg Koukl has a new book coming out soon, called “Faith is Not Wishing”. Greg Koukl formed my views on what faith is, along with R.C. Sproul and J.P. Moreland. For now, you can read this article about faith by Greg Koukl, and it’s FREE.