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''See also:'' [[Origin of Life]]
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'''Abiogenesis''', also known as [[spontaneous generation]], in its 19<sup>th</sup> century meaning, referred to the "now discredited theory that living organisms can arise spontaneously from inanimate matter".<ref>[http://dictionary.reference.com/browse/abiogenesis Dictionary.com: Abiogenesis]</ref>  At that time, there was much speculation on just how living things can come into existence.  The experiments of Louis Pasteur helped improve the understanding of the subject.
  
Abiogenesis (pronounced  ay-by-oh-jen-ə-siss[1]) or biopoiesis is the study of how biological life could arise from inorganic matter through natural processes. In particular, the term usually refers to the processes by which life on Earth may have arisen. Abiogenesis likely occurred between 3.9 and 3.5 billion years ago, in the Eoarchean era (i.e. the time after the Hadean era in which the Earth was essentially molten).
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In the modern sense of the word, it refers to whatever transition is presumed to have occurred between a universe with no living things (it is generally accepted that living things were not present in the original quark-gluon plasma of the [[big bang]]), and the present universe.
  
Hypotheses about the origins of life may be divided into several categories. Most approaches investigate how self-replicating molecules or their components came into existence. For example, the Miller–Urey experiment and similar experiments demonstrated that most amino acids, often called "the building blocks of life", were shown to be racemically synthesized in conditions thought to be similar to those of the early Earth. Several mechanisms have been investigated, including lightning and radiation. Other approaches ("metabolism first" hypotheses) focus on understanding how catalysis in chemical systems in the early Earth might have provided the precursor molecules necessary for self-replication.
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Most scientists believe that an event of abiogenesis, about 3.5 billion years ago, was the origin of life on [[Earth]]. How this could have happened is not yet understood; it is  matter of intense inquiry and speculation. No process by which organisms, even incredibly simple ones, can be created from non-living matter has been observed, in the wild or in the laboratory.
  
Spontaneous generation
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==Historical Background==
Main article: Spontaneous generation
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Abiogenesis relates to so called [[spontaneous generation]], an archaic theory that stated that life could appear spontaneously under particular conditions. For example, pieces of cheese and bread wrapped in rags and left in dark areas were thought to produce mice, because mice appeared in the food after several weeks. This theory was finally put to rest by experiments by [[Louis Pasteur]]. In his historical address delivered at the "Sorbonne Scientific Soirée" on April 7, 1864, he criticized this theory i.a. by tracing its roots at least back to celebrated alchemical physician Van Helmont who lived in the seventeenth century.<ref>{{cite web |title=On Spontaneous Generation: An address delivered by Louis Pasteur at the "Sorbonne Scientific Soirée" of April 7, 1864 |author=Alexander Levine  
Belief in the ongoing spontaneous generation of certain forms of life from non-living matter goes back to ancient Greek philosophy and continued to have support in Western scholarship until the 19th century; this was paired with the belief in heterogenesis, i.e. that one form of life derived from a different form (e.g. bees from flowers).[2] Classical notions of abiogenesis, now more precisely known as spontaneous generation, held that certain complex, living organisms are generated by decaying organic substances. According to Aristotle, it was a readily observable truth that aphids arise from the dew which falls on plants, flies from putrid matter, mice from dirty hay, crocodiles from rotting logs at the bottom of bodies of water, and so on.[3] In the 17th century, such assumptions started to be questioned. In 1646, Sir Thomas Browne published his Pseudodoxia Epidemica (subtitled Enquiries into Very many Received Tenets, and Commonly Presumed Truths), which was an attack on false beliefs and "vulgar errors." His conclusions were not widely accepted at the time. His contemporary, Alexander Ross wrote: "To question this (i.e., spontaneous generation) is to question reason, sense and experience. If he doubts of this let him go to Egypt, and there he will find the fields swarming with mice, begot of the mud of Nylus, to the great calamity of the inhabitants."[4]
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|date=17 November 2011|url=http://www.pasteurbrewing.com/Articles/spontaneous-generation/on-spontaneous-generation.html}}</ref> Pasteur exposed declarations made by Van Helmont stating that ''When water from the purest spring is placed in a flask steeped in leavening fumes, it putrefies, engendering maggots. The fumes which rise from the bottom of a swamp produce frogs, ants, leeches, and vegetation... Carve an indentation in a brick, fill it with crushed basil, and cover the brick with another, so that the indentation is completely sealed. Expose the two bricks to sunlight, and you will find that within a few days, fumes from the basil, acting as a leavening agent, will have transformed the vegetable matter into veritable scorpions.'' He also affirmed having conducted the [[experiment]] described as: ''If a soiled shirt is placed in the opening of a vessel containing grains of wheat, the reaction of the leaven in the shirt with fumes from the wheat will, after approximately twenty-one days, transform the wheat into mice'' and added that the resulting mice are adults, male and female, and that they may continue to reproduce their [[species]] by copulation. Pasteur ironically commented that "though it is easy enough to conduct experiments, it is far from easy to conduct ''irreproachable'' ones" and finally concluded that experiments of the sort adduced, in the seventeenth century, in favor of the doctrine of spontaneous generation, are absurd even if they would be defended by famous names like [[Epicurus]], [[Aristotle]], or Van Helmont himself. Although Pasteur believed the doctrine of spontaneous generation, previously fueled i.a. by earlier [[Kant]]'s philosophical [[metaphysical]] dogmas{{#tag:ref|cf. [[Kant#Philosopher of Protestantism vs. of Evolutionary thought|Kant: Philosopher of Protestantism vs. of Evolutionary thought:]]|group=note}} as well as by Pasteur's contemporaries Pouchet, Musset, Joly and Buffon, will never recover from the mortal blow inflicted by his [[experimental science|experiments]], a group of evolutionists, who needed to camouflage their adherence to failed hypothesis, rebranded and modified original theory under the new name of so-called [[chemical evolution]]. Yet, in effort to distance evolutionary theory from the origin of life, most evolutionary propagandists now call it ‘abiogenesis’.<ref>{{cite web |title=Why the Miller–Urey research argues against abiogenesis |author= Jerry Bergman |publisher=CMI |url=https://creation.com/why-the-miller-urey-research-argues-against-abiogenesis |quote=Abiogenesis was once commonly called ‘chemical evolution’, but evolutionists today try to distance evolutionary theory from the origin of life. This is one reason that most evolutionary propagandists now call it ‘abiogenesis’. Chemical evolution is actually part of the ‘General Theory of Evolution’, defined by the evolutionist Kerkut as ‘the theory that all the living forms in the world have arisen from a single source which itself came from an inorganic form’.}}</ref>
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Another reason exists to exaggerate abiogenesis claims—it is an area that is critical to proving evolutionary naturalism. If abiogenesis is impossible, or extremely unlikely{{#tag:ref|cf. ''"Here we show that although dual coding is nearly impossible by chance, a number of human transcripts contain overlapping coding regions."'' <ref>{{cite web |title=A First Look at ARFome: Dual-Coding Genes in Mammalian Genomes |author=Wen-Yu Chung et al. |publisher=PLoS Comput Biol. |date=2007 May |issue=3(5): e91. |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1868773/ |accessdate=December 30, 2013}}</ref>|group=note}}, then so is naturalism.
  
In 1665, Robert Hooke published the first drawings of a microorganism. Hooke was followed in 1676 by Anton van Leeuwenhoek, who drew and described microorganisms that are now thought to have been protozoa and bacteria.[5] Many felt the existence of microorganisms was evidence in support of spontaneous generation, since microorganisms seemed too simplistic for sexual reproduction, and asexual reproduction through cell division had not yet been observed. van Leeuwenhoek took issue with the ideas common at the time that fleas and lice could spontaneously result from putrefaction, and that frogs could likewise arise from slime. Using a broad range of experiments ranging from sealed and open meat incubation and the close study of insect reproduction, by the 1680s he became convinced that spontaneous generation was incorrect.[6]
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==The Current Modifications to the Original Theory==
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*'''Initial Ingredients:''' The water from the purest spring, leavening fumes, crushed basil and other such ingredients have been replaced by references to so called '[[Primeval soup|primordial soup]]' or 'warm pond' of unknown composition. Evolutionists such as David Deamer, emeritus professor of chemistry at the University of California at Santa Cruz, have tried to put this idea under the test with the following result: ''"The results are surprising and in some ways disappointing. It seems that hot acidic waters containing clay do not provide the right conditions for chemicals to assemble themselves into 'pioneer organisms.'"'' He further explains the reasons for the setback: ''"in our experiments, the organic compounds became so strongly held to the clay particles that they could not undergo any further chemical reactions."'' The conclusion was made that if life really did begin in a 'warm little pond' at all, then it was unlikely in hot volcanic springs or marine hydrothermal vents.<ref>{{cite web |author=Rebecca Morelle |title=Darwin's warm pond idea is tested |date=13 February 2006 |url=http://news.bbc.co.uk/2/hi/science/nature/4702336.stm |accessdate=4 August 2013}}</ref>
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*'''Mechanism:''' The necessity to use flask or cover one brick with another, so that the indentation is completely sealed, has been eased by using 'the little bit of luck' instead.  Evolutionary biologist and University of Oxford's Professor [[Dawkins]] explains: ''"And, of course, the puzzling thing is where does all this complexity come from? Where does all this information come from? It cannot come about by chance. It’s absolutely inconceivable that you could get something as complicated as a bird, and as well designed as a bird, or a human, or a hedgehog, coming about by chance. That’s absolutely out. Because to get from nothing, from no complexity, no information, to the extreme complexity of a modern living thing in one step of chance couldn’t possibly happen. That would be like throwing a dice a thousand times and getting six every single time. It’s out of the question. But if you allow a little bit of luck in any one generation, and then a little bit of luck in the next generation, little bit of luck in the next generation, by cumulatively adding this luck{{#tag:ref|In the [[Roman mythology]], good luck was represented by the goddess Felicitas. In his book ''the City of God'' (''De Civitate Dei''), [[Saint Augustine]] compares the [[Idolatry|idolatrous]] [[pagan]] worshipers of this goddess to mistaken primitive and stubborn people who would attempt to satiate their hunger by licking the bread painted on the wood.<ref>{{cite book |title=The City of Gog |author=Saint Augustine (Translated by Marcus Dods) |publisher=Christian Classics Ethereal Library |place=Grand Rapids, MI |chapter=Book IV/23.Concerning Felicity... |url=http://www.ccel.org/ccel/schaff/npnf102.pdf |quote=Was Felicity perhaps justly indignant, both because she was invited so late, and was invited not to honor, but rather to reproach, because along with her were worshiped Priapus, and Cloacina, and Fear and Dread, and Ague, and others which were not gods to be worshiped, but the crimes of the worshippers? ...the Capitol was built in such a way that these three also might be within it, yet with such obscure signs that even the most learned men could scarcely know this.  Surely, then, Jupiter himself would by no means despise Felicity, as he was himself despised by Terminus, Mars, and Juventas. ... But if Felicity is not a goddess, because, as is true, it is a gift of God, that god must be sought who has power to give it, and that hurtful multitude of false gods must be abandoned which the vain multitude of foolish men follows after, making gods to itself of the gifts of God, and offending Himself whose gifts they are by the stubbornness of a proud will. For he cannot be free from infelicity who worships Felicity as a goddess, and forsakes God, the giver of felicity; just as he cannot be free from hunger who licks a painted loaf of bread, and does not buy it of the man who has a real one.}}</ref>|group=note}} step by step by step by step{{#tag:ref|cf.''"But were I to make such a claim I would observe, as Richard Dawkins does, that to the extent that simultaneous and parallel changes are required to form a complex organ, to that extent does the hypothesis of random variation and natural selection become implausible. It is one thing to find a single needle in a haystack, quite another to find a dozen needles in a dozen haystacks at precisely the same time. Surely the [[burden of proof]] in such matters is not mine. I am not obliged to defend such mathematical trivialities as the proposition that as independent events are multiplied in number, their joint probability of occurrence plummets."'' (David Berlinski)<ref>{{cite web|title=A Scientific Scandal? David Berlinski & Critics|author=David Berlinski|publisher=Center for Science and Culture(originally: Commentary)|date=July 8, 2003|accessdate=May 15, 2013|url=http://www.discovery.org/a/1509}}</ref>|group=note}}, you can work from any degree of simplicity to any degree of complexity.{{#tag:ref|cf.[[Logic of possibility]]|group=note}} All you need is enough time."''{{#tag:ref|(The God Delusion, p. 59)|group=note}} As this proposition remains out of reach of any scientific test that, as Pasteur pointed out, assumes the possibility to conduct experiments, this alien 'mechanism' can be effectively labeled as [[Evolution of the gaps]].
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*'''The time line:''' Van Helmont claimed that transformation of start-up ingredients into living organisms such as veritable scorpions takes place within a few days and 'wheat into mice' after approximately twenty-one days. On the other hand, though the contemporary theory of evolution does not specify an origin to life on Earth, some evolutionists and nearly all [[atheism|atheists]] believe that abiogenesis has occurred at least once approximately 3.5 billion years ago. They theorize that several molecules connected in a way that allowed them to be self-reproducing, and that these "living" beings later evolved into present organisms. As of yet, no self-reproducing molecules have been observed to raise their existence in assumed early-Earth-like conditions.<ref>{{cite web |title= Evolution: Possible or Impossible? |author=James F. Coppedge |chapter=3.The Mystery of the Left-Handed Molecules in Proteins |url=http://creationsafaris.com/epoi_c03.htm |accessdate=January 3, 2014 |quote=While it is true that opposites can be linked in the laboratory, what about that question if we consider the conditions that evolution assumes to have been existing before life began? ... After considering all the attempts, it is clear that unless chance could do it, there is at present no adequate answer from a naturalistic standpoint to explain how this left-handed condition began. As a result, there is little evidence of any agreement or consensus among scientists regarding its source.  Oparin must presume that this stereoselectivity started without prior design. Any other belief would be inconsistent with his communist philosophy.  (Interestingly, that viewpoint – dialectical materialism – is not atheistic after all.  Professor Claude Tresmontant of the University of Paris has pointed out with unanswerable logic that communists are actually pantheists, worshiping matter-in-motion. ...The probability of the formation of one antipode or the other is therefore the same.  As the law of averages applies to chemical reactions the appearance of an excess of one antipode is very improbable, and, in fact, we never encounter it under the conditions of non-living nature and in laboratory syntheses . . . . In living organisms, on the contrary, the amino acids of which naturally occurring proteins are made always have the left-handed configuration. . . . This ability of protoplasm selectively to synthesize and accumulate one antipode alone is called the asymmetry of living material. It is a characteristic feature of all organisms without exception but is absent from inanimate nature. Pasteur pointed out this fact as follows: “This great character is, perhaps, the only sharp dividing line which we can draw at present between the chemistry of dead and living nature.”)}}</ref> Sometimes a vague proposition "All you need is enough time" is given.{{#tag:ref|cf. [[Explanation in science]] and [[Fog displacement]]|group=note}}
  
The first experimental evidence against spontaneous generation came in 1668 when Francesco Redi proved that no maggots appeared in meat when flies were prevented from laying eggs. It was gradually shown that, at least in the case of all the higher and readily visible organisms, the previous sentiment regarding spontaneous generation was false. The alternative seemed to be biogenesis: that every living thing came from a pre-existing living thing (omne vivum ex ovo, Latin for "every living thing from an egg").
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==Omnia viva ex vivo==
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Pasteur effectively confirmed with his experiments the long-standing truism that life comes only from life, expressed in Latin words as ''[[Law of biogenesis|Omnia viva ex vivo]]'',<ref name="Excuse">{{cite book
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|title=Without Excuse
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|author=Werner Gitt
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|publisher=Creation Book Publishers
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|year=2011
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|pages=143, 177, 323
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|url=http://www.wernergitt.de/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=1505&virtuemart_category_id=126&Itemid=131&lang=de
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|isbn=978-1-921643-41-5
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|quote=}}</ref><ref name="DeniableDarwin">{{cite book
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|author=David Berlinski
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|title=The Deniable Darwin
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|publisher=Discovery Institute Press (reprinted from ''Commentary'' February 1998 by permission)
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|location=Seattle, USA
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|year=2009
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|pages=476
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|chapter=Was there a Big Bang?
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|isbn=978-0-9790141-2-3
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|url=http://www.davidberlinski.org/deniable-darwin/about.php
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|quote=On the level of intuition and experience, these facts suggest nothing more mysterious than the longstanding truism that lifes comes only from life. ''Omnia viva ex vivo'', as Latin writers said.}}</ref> which thus had been according to German information specialist Werner Gitt elevated to the status of [[Natural Law|natural law]]. After accounting for the contemporary scientific research results, Werner formulated the corresponding theorem:
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<blockquote>''There is no known law of nature, no known process, and no known sequence of events which can cause information to originate by itself in matter.''</blockquote> 
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Klaus Dose pointed out that all evolutionary theses that living systems developed from poly-nucleotides which originated spontaneously are devoid of any empirical base.
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<ref>{{cite web
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|title=Die Ursprünge des Lebens
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|author=Klaus Dose
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|publisher=Nachrichten aus Chemie, Technik und Laboratorium
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|volume= 31
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|issue=12
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|pages 968–970
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|date=December 1983
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|doi=10.1002/nadc.19830311208
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|url=http://onlinelibrary.wiley.com/doi/10.1002/nadc.19830311208/abstract
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|language=German}}</ref><ref>{{cite book
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|title=In the beginning was information
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|author=Werner Gitt
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|publisher=New Leaf Publishing Group
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|year=2006
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|pages=106
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|isbn=9781614581208
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|url=https://books.google.com/books/about/In_the_Beginning_Was_Information.html?id=nHuR3_9V03IC&redir_esc=y}}</ref>
  
In 1768, Lazzaro Spallanzani demonstrated that microbes were present in the air, and could be killed by boiling. In 1861, Louis Pasteur performed a series of experiments that demonstrated that organisms such as bacteria and fungi do not spontaneously appear in sterile, nutrient-rich media, but only invade them from outside.
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===Biblical Example===
 
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''See also:'' [[Origin of Life]]
Complex biological molecules and protocells
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The most famous example of abiogenesis begins in Genesis 1:20, when [[God]] created life:
Sidney W. Fox also experimented with abiogenesis and the primordial soup theory. In one of his experiments, he allowed amino acids to dry out as if puddled in a warm, dry spot in prebiotic conditions. He found that, as they dried, the amino acids formed long, often cross-linked, thread-like, submicroscopic molecules now named "proteinoids".
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{{Bible quote|And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven.|book=Genesis|chap=1|verses=20|version=KJV}}
 
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In another experiment using a similar method to set suitable conditions for life to form, Fox collected volcanic material from a cinder cone in Hawaii. He discovered that the temperature was over 100 °C (212 °F) just 4 inches (100 mm) beneath the surface of the cinder cone, and suggested that this might have been the environment in which life was created—molecules could have formed and then been washed through the loose volcanic ash and into the sea. He placed lumps of lava over amino acids derived from methane, ammonia and water, sterilized all materials, and baked the lava over the amino acids for a few hours in a glass oven. A brown, sticky substance formed over the surface and when the lava was drenched in sterilized water a thick, brown liquid leached out. It turned out that the amino acids had combined to form proteinoids, and the proteinoids had combined to form small, cell-like spheres. Fox called these "microspheres", a name that subsequently was displaced by the more informative term protobionts. His protobionts were not cells, although they formed clumps and chains reminiscent of cyanobacteria. They contained no functional nucleic acids, but split asexually and formed within double membranes that had some attributes suggestive of cell membranes. Professor Colin S. Pittendrigh stated in December 1967 that "laboratories will be creating a living cell within ten years," a remark that reflected the typical contemporary levels of innocence of the complexity of cell structures.[16]
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[edit]Early conditions
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Main article: Timeline of evolution
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The Hadean Earth is thought to have had a secondary atmosphere, formed through degassing of the rocks that accumulated from planetesimal impactors. At first it was thought by scientists like Harold Urey, that the earth's atmosphere was made up of hydrates—methane, ammonia and water vapour, and that life began under such reducing conditions, conducive to the formation of organic molecules. However, it is now thought that the early atmosphere, based on today's volcanic evidence, would have contained 60% hydrogen, 20% oxygen (mostly in the form of water vapour), 10% carbon dioxide, 5 to 7% hydrogen sulphide, and smaller amounts of nitrogen, carbon monoxide, free hydrogen, methane and inert gases. As the earth lacks the gravity to hold any hydrogen, this component of the atmosphere was rapidly lost during the Hadean period. Solution of the carbon dioxide in water is thought to have made the seas slightly acid, with a pH of about 5.5.[17]
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Morse and MacKenzie have suggested that oceans may have appeared first in the Hadean eon, as soon as two hundred million years (200 Ma) after the Earth was formed, in a hot 100 °C (212 °F) reducing environment, and that the pH of about 5.8 rose rapidly towards neutral.[18] This has been supported by Wilde[19] who has pushed the date of the zircon crystals found in the metamorphosed quartzite of Mount Narryer in Western Australia, previously thought to be 4.1–4.2 Ga, to 4.404 Ga. This means that oceans and continental crust existed within 150 Ma of Earth's formation. Rosing et al.,[20] suggest that between 4.4 and 4.3 Ga, the Earth was a water world, with little if any continental crust, with an extremely turbulent atmosphere and a hydrosphere subject to high uV, from a T Tauri sun and cosmic radiation and continued bolide impact.
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As a result, the Hadean environment was one highly hazardous to modern life. Frequent collisions with large objects, up to 500 kilometres (310 mi) in diameter, would have been sufficient to vaporise the ocean within a few months of impact, with hot steam mixed with rock vapour leading to high altitude clouds completely covering the planet. After a few months the height of these clouds would have begun to decrease but the cloud base would still have been elevated for about the next thousand years. After that, it would have begun to rain at low altitude. For another two thousand years rains would slowly have drawn down the height of the clouds, returning the oceans to their original depth only 3,000 years after the impact event.[21]
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Between 3.8 and 4.1 Ga, changes in the orbits of the gaseous giant planets may have caused a late heavy bombardment that pockmarked the Moon and the other inner planets (Mercury, Mars, and presumably Earth and Venus). This would likely have sterilized the planet, had life appeared before that time. Geologically the Hadean Earth would have been far more active than at any other time in its history. Studies of meteorites suggests that radioactive elements such as Aluminium-26 with a half-life of 7.17×105, and Potassium-40 with a half-life of 1.250×109 years, isotopes mainly produced in supernovae, were much more common, with the result that the earth was more than 96% more radioactive than it is today. Coupled with internal heating as a result of gravitational sorting between the core and the mantle generated a great deal of mantle convection, with the probable result that there would have been many more smaller very active tectonic plates, than in modern times.
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By examining the time interval between such devastating environmental events, the time interval when life might first have come into existence can be found for different early environments. The study by Maher and Stevenson shows that if the deep marine hydrothermal setting provides a suitable site for the origin of life, abiogenesis could have happened as early as 4.0 to 4.2 Ga, whereas if it occurred at the surface of the Earth abiogenesis could only have occurred between 3.7 and 4.0 Ga.[22]
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Other research suggests a colder start to life. Work by Leslie Orgel and colleagues on the synthesis of purines has shown that freezing temperatures are advantageous, due to the concentrating effect for key precursors such as hydrogen cyanide.[23] Research by Stanley Miller and colleagues suggested that while adenine and guanine require freezing conditions for synthesis, cytosine and uracil may require boiling temperatures.[24] An article in Discover Magazine points to research by the Miller group indicating the formation of seven different amino acids and 11 types of nucleobases in ice when ammonia and cyanide were left in a freezer from 1972–1997.[25][26] This article also describes research by Christof Biebricher showing the formation of RNA molecules 400 bases long under freezing conditions using an RNA template, a single-strand chain of RNA that guides the formation of a new strand of RNA. As that new RNA strand grows, it adheres to the template.[27] The explanation given for the unusual speed of these reactions at such a low temperature is eutectic freezing. As an ice crystal forms, it stays pure: only molecules of water join the growing crystal, while impurities like salt or cyanide are excluded. These impurities become crowded in microscopic pockets of liquid within the ice, and this crowding causes the molecules to collide more often.
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==See also==
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*[[Singularity#Biological singularity|Biological singularity]]
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*[[Creation]]
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*[[Biblical scientific foreknowledge]]
  
Evidence of the early appearance of life comes from the Isua supercrustal belt in Western Greenland and from similar formations in the nearby Akilia Islands. Carbon entering into rock formations has a ratio of Carbon-13 (13C) to Carbon-12 (12C) of about −5.5 (in units of δ13C), where because of a preferential biotic uptake of 12C, biomass has a δ13C of between −20 and −30. These isotopic fingerprints are preserved in the sediments, and Mojzis has used this technique to suggest that life existed on the planet already by 3.85 billion years ago.[28] Lazcano and Miller (1994) suggest that the rapidity of the evolution of life is dictated by the rate of recirculating water through mid-ocean submarine vents. Complete recirculation takes 10 million years, thus any organic compounds produced by then would be altered or destroyed by temperatures exceeding 300 °C (572 °F). They estimate that the development of a 100 kilobase genome of a DNA/protein primitive heterotroph into a 7000 gene filamentous cyanobacterium would have required only 7 Ma.[29] The Nobel Prize winning chemist, Christian de Duve, argues that the determination of chemistry means that "life has to emerge quickly... Chemical reactions happen quickly or not at all; if any reaction takes a millennium to complete then the chances are all the reagents will simply dissipate or breakdown in the meantime, unless they are replenished by other faster reactions".[30][31]
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== External links ==
  
[edit]
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*[https://creation.com/origin-of-life Origin of life]
Current models
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*[https://www.trueorigin.org/abio.php Why abiogenesis is impossible]
  
There is no "standard model" of the origin of life. Most currently accepted models draw at least some elements from the framework laid out by the Oparin-Haldane hypothesis. Under that umbrella, however, are a wide array of disparate discoveries and conjectures such as the following, listed in a rough order of postulated emergence:
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==Notes==
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<references group=note/>
  
Some theorists suggest that the atmosphere of the early Earth may have been chemically reducing in nature, composed primarily of methane (CH4), ammonia (NH3), water (H2O), hydrogen sulfide (H2S), carbon dioxide (CO2) or carbon monoxide (CO), and phosphate (PO43-), with molecular oxygen (O2) and ozone (O3) either rare or absent.
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==References==
In such a reducing atmosphere, electrical activity can catalyze the creation of certain basic small molecules (monomers) of life, such as amino acids. This was demonstrated in the Miller–Urey experiment by Stanley L. Miller and Harold C. Urey in 1953.
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<references/>
Phospholipids (of an appropriate length) can form lipid bilayers, a basic component of the cell membrane.
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A fundamental question is about the nature of the first self-replicating molecule. Since replication is accomplished in modern cells through the cooperative action of proteins and nucleic acids, the major schools of thought about how the process originated can be broadly classified as "proteins first" and "nucleic acids first".
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The principal thrust of the "nucleic acids first" argument is as follows:
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The polymerization of nucleotides into random RNA molecules might have resulted in self-replicating ribozymes (RNA world hypothesis)
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Selection pressures for catalytic efficiency and diversity might have resulted in ribozymes which catalyse peptidyl transfer (hence formation of small proteins), since oligopeptides complex with RNA to form better catalysts. The first ribosome might have been created by such a process, resulting in more prevalent protein synthesis.
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Synthesized proteins might then outcompete ribozymes in catalytic ability, and therefore become the dominant biopolymer, relegating nucleic acids to their modern use, predominantly as a carrier of genomic information.
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No one has yet synthesized a "protocell" using basic components which would have the necessary properties of life (the so-called "bottom-up-approach"). Without such a proof-of-principle, explanations have tended to be focused on chemosynthesis of polymers. However, some researchers are working in this field, notably Steen Rasmussen at Los Alamos National Laboratory and Jack Szostak at Harvard University. Others have argued that a "top-down approach" is more feasible. One such approach, successfully attempted by Craig Venter and others at The Institute for Genomic Research, involves engineering existing prokaryotic cells with progressively fewer genes, attempting to discern at which point the most minimal requirements for life were reached.[32][33] The biologist John Desmond Bernal coined the term biopoiesis for this process,[34] and suggested that there were a number of clearly defined "stages" that could be recognised in explaining the origin of life.
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Stage 1: The origin of biological monomers
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{{creation vs. evolution}}[[Category:Evolution]][[Category:Atheism]][[Category:Pseudoscience]]
Stage 2: The origin of biological polymers
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Stage 3: The evolution from molecules to cell
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Bernal suggested that evolution commenced between Stage 1 and 2.[35
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Latest revision as of 04:54, April 9, 2019

Abiogenesis, also known as spontaneous generation, in its 19th century meaning, referred to the "now discredited theory that living organisms can arise spontaneously from inanimate matter".[1] At that time, there was much speculation on just how living things can come into existence. The experiments of Louis Pasteur helped improve the understanding of the subject.

In the modern sense of the word, it refers to whatever transition is presumed to have occurred between a universe with no living things (it is generally accepted that living things were not present in the original quark-gluon plasma of the big bang), and the present universe.

Most scientists believe that an event of abiogenesis, about 3.5 billion years ago, was the origin of life on Earth. How this could have happened is not yet understood; it is matter of intense inquiry and speculation. No process by which organisms, even incredibly simple ones, can be created from non-living matter has been observed, in the wild or in the laboratory.

Historical Background

Abiogenesis relates to so called spontaneous generation, an archaic theory that stated that life could appear spontaneously under particular conditions. For example, pieces of cheese and bread wrapped in rags and left in dark areas were thought to produce mice, because mice appeared in the food after several weeks. This theory was finally put to rest by experiments by Louis Pasteur. In his historical address delivered at the "Sorbonne Scientific Soirée" on April 7, 1864, he criticized this theory i.a. by tracing its roots at least back to celebrated alchemical physician Van Helmont who lived in the seventeenth century.[2] Pasteur exposed declarations made by Van Helmont stating that When water from the purest spring is placed in a flask steeped in leavening fumes, it putrefies, engendering maggots. The fumes which rise from the bottom of a swamp produce frogs, ants, leeches, and vegetation... Carve an indentation in a brick, fill it with crushed basil, and cover the brick with another, so that the indentation is completely sealed. Expose the two bricks to sunlight, and you will find that within a few days, fumes from the basil, acting as a leavening agent, will have transformed the vegetable matter into veritable scorpions. He also affirmed having conducted the experiment described as: If a soiled shirt is placed in the opening of a vessel containing grains of wheat, the reaction of the leaven in the shirt with fumes from the wheat will, after approximately twenty-one days, transform the wheat into mice and added that the resulting mice are adults, male and female, and that they may continue to reproduce their species by copulation. Pasteur ironically commented that "though it is easy enough to conduct experiments, it is far from easy to conduct irreproachable ones" and finally concluded that experiments of the sort adduced, in the seventeenth century, in favor of the doctrine of spontaneous generation, are absurd even if they would be defended by famous names like Epicurus, Aristotle, or Van Helmont himself. Although Pasteur believed the doctrine of spontaneous generation, previously fueled i.a. by earlier Kant's philosophical metaphysical dogmas[note 1] as well as by Pasteur's contemporaries Pouchet, Musset, Joly and Buffon, will never recover from the mortal blow inflicted by his experiments, a group of evolutionists, who needed to camouflage their adherence to failed hypothesis, rebranded and modified original theory under the new name of so-called chemical evolution. Yet, in effort to distance evolutionary theory from the origin of life, most evolutionary propagandists now call it ‘abiogenesis’.[3] Another reason exists to exaggerate abiogenesis claims—it is an area that is critical to proving evolutionary naturalism. If abiogenesis is impossible, or extremely unlikely[note 2], then so is naturalism.

The Current Modifications to the Original Theory

  • Initial Ingredients: The water from the purest spring, leavening fumes, crushed basil and other such ingredients have been replaced by references to so called 'primordial soup' or 'warm pond' of unknown composition. Evolutionists such as David Deamer, emeritus professor of chemistry at the University of California at Santa Cruz, have tried to put this idea under the test with the following result: "The results are surprising and in some ways disappointing. It seems that hot acidic waters containing clay do not provide the right conditions for chemicals to assemble themselves into 'pioneer organisms.'" He further explains the reasons for the setback: "in our experiments, the organic compounds became so strongly held to the clay particles that they could not undergo any further chemical reactions." The conclusion was made that if life really did begin in a 'warm little pond' at all, then it was unlikely in hot volcanic springs or marine hydrothermal vents.[5]
  • Mechanism: The necessity to use flask or cover one brick with another, so that the indentation is completely sealed, has been eased by using 'the little bit of luck' instead. Evolutionary biologist and University of Oxford's Professor Dawkins explains: "And, of course, the puzzling thing is where does all this complexity come from? Where does all this information come from? It cannot come about by chance. It’s absolutely inconceivable that you could get something as complicated as a bird, and as well designed as a bird, or a human, or a hedgehog, coming about by chance. That’s absolutely out. Because to get from nothing, from no complexity, no information, to the extreme complexity of a modern living thing in one step of chance couldn’t possibly happen. That would be like throwing a dice a thousand times and getting six every single time. It’s out of the question. But if you allow a little bit of luck in any one generation, and then a little bit of luck in the next generation, little bit of luck in the next generation, by cumulatively adding this luck[note 3] step by step by step by step[note 4], you can work from any degree of simplicity to any degree of complexity.[note 5] All you need is enough time."[note 6] As this proposition remains out of reach of any scientific test that, as Pasteur pointed out, assumes the possibility to conduct experiments, this alien 'mechanism' can be effectively labeled as Evolution of the gaps.
  • The time line: Van Helmont claimed that transformation of start-up ingredients into living organisms such as veritable scorpions takes place within a few days and 'wheat into mice' after approximately twenty-one days. On the other hand, though the contemporary theory of evolution does not specify an origin to life on Earth, some evolutionists and nearly all atheists believe that abiogenesis has occurred at least once approximately 3.5 billion years ago. They theorize that several molecules connected in a way that allowed them to be self-reproducing, and that these "living" beings later evolved into present organisms. As of yet, no self-reproducing molecules have been observed to raise their existence in assumed early-Earth-like conditions.[8] Sometimes a vague proposition "All you need is enough time" is given.[note 7]

Omnia viva ex vivo

Pasteur effectively confirmed with his experiments the long-standing truism that life comes only from life, expressed in Latin words as Omnia viva ex vivo,[9][10] which thus had been according to German information specialist Werner Gitt elevated to the status of natural law. After accounting for the contemporary scientific research results, Werner formulated the corresponding theorem:

There is no known law of nature, no known process, and no known sequence of events which can cause information to originate by itself in matter.

Klaus Dose pointed out that all evolutionary theses that living systems developed from poly-nucleotides which originated spontaneously are devoid of any empirical base. [11][12]

Biblical Example

See also: Origin of Life The most famous example of abiogenesis begins in Genesis 1:20, when God created life:

And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven. Genesis 1:20 (KJV)

See also

External links

Notes

  1. cf. Kant: Philosopher of Protestantism vs. of Evolutionary thought:
  2. cf. "Here we show that although dual coding is nearly impossible by chance, a number of human transcripts contain overlapping coding regions." [4]
  3. In the Roman mythology, good luck was represented by the goddess Felicitas. In his book the City of God (De Civitate Dei), Saint Augustine compares the idolatrous pagan worshipers of this goddess to mistaken primitive and stubborn people who would attempt to satiate their hunger by licking the bread painted on the wood.[6]
  4. cf."But were I to make such a claim I would observe, as Richard Dawkins does, that to the extent that simultaneous and parallel changes are required to form a complex organ, to that extent does the hypothesis of random variation and natural selection become implausible. It is one thing to find a single needle in a haystack, quite another to find a dozen needles in a dozen haystacks at precisely the same time. Surely the burden of proof in such matters is not mine. I am not obliged to defend such mathematical trivialities as the proposition that as independent events are multiplied in number, their joint probability of occurrence plummets." (David Berlinski)[7]
  5. cf.Logic of possibility
  6. (The God Delusion, p. 59)
  7. cf. Explanation in science and Fog displacement

References

  1. Dictionary.com: Abiogenesis
  2. Alexander Levine (17 November 2011). On Spontaneous Generation: An address delivered by Louis Pasteur at the "Sorbonne Scientific Soirée" of April 7, 1864.
  3. Jerry Bergman. Why the Miller–Urey research argues against abiogenesis. CMI. “Abiogenesis was once commonly called ‘chemical evolution’, but evolutionists today try to distance evolutionary theory from the origin of life. This is one reason that most evolutionary propagandists now call it ‘abiogenesis’. Chemical evolution is actually part of the ‘General Theory of Evolution’, defined by the evolutionist Kerkut as ‘the theory that all the living forms in the world have arisen from a single source which itself came from an inorganic form’.”
  4. Wen-Yu Chung et al. (2007 May). A First Look at ARFome: Dual-Coding Genes in Mammalian Genomes. PLoS Comput Biol.. Retrieved on December 30, 2013.
  5. Rebecca Morelle (13 February 2006). Darwin's warm pond idea is tested. Retrieved on 4 August 2013.
  6. Saint Augustine (Translated by Marcus Dods). "Book IV/23.Concerning Felicity...", The City of Gog. Christian Classics Ethereal Library. “Was Felicity perhaps justly indignant, both because she was invited so late, and was invited not to honor, but rather to reproach, because along with her were worshiped Priapus, and Cloacina, and Fear and Dread, and Ague, and others which were not gods to be worshiped, but the crimes of the worshippers? ...the Capitol was built in such a way that these three also might be within it, yet with such obscure signs that even the most learned men could scarcely know this.  Surely, then, Jupiter himself would by no means despise Felicity, as he was himself despised by Terminus, Mars, and Juventas. ... But if Felicity is not a goddess, because, as is true, it is a gift of God, that god must be sought who has power to give it, and that hurtful multitude of false gods must be abandoned which the vain multitude of foolish men follows after, making gods to itself of the gifts of God, and offending Himself whose gifts they are by the stubbornness of a proud will. For he cannot be free from infelicity who worships Felicity as a goddess, and forsakes God, the giver of felicity; just as he cannot be free from hunger who licks a painted loaf of bread, and does not buy it of the man who has a real one.” 
  7. David Berlinski (July 8, 2003). A Scientific Scandal? David Berlinski & Critics. Center for Science and Culture(originally: Commentary). Retrieved on May 15, 2013.
  8. James F. Coppedge. Evolution: Possible or Impossible?. Retrieved on January 3, 2014. “While it is true that opposites can be linked in the laboratory, what about that question if we consider the conditions that evolution assumes to have been existing before life began? ... After considering all the attempts, it is clear that unless chance could do it, there is at present no adequate answer from a naturalistic standpoint to explain how this left-handed condition began. As a result, there is little evidence of any agreement or consensus among scientists regarding its source. Oparin must presume that this stereoselectivity started without prior design. Any other belief would be inconsistent with his communist philosophy. (Interestingly, that viewpoint – dialectical materialism – is not atheistic after all. Professor Claude Tresmontant of the University of Paris has pointed out with unanswerable logic that communists are actually pantheists, worshiping matter-in-motion. ...The probability of the formation of one antipode or the other is therefore the same. As the law of averages applies to chemical reactions the appearance of an excess of one antipode is very improbable, and, in fact, we never encounter it under the conditions of non-living nature and in laboratory syntheses . . . . In living organisms, on the contrary, the amino acids of which naturally occurring proteins are made always have the left-handed configuration. . . . This ability of protoplasm selectively to synthesize and accumulate one antipode alone is called the asymmetry of living material. It is a characteristic feature of all organisms without exception but is absent from inanimate nature. Pasteur pointed out this fact as follows: “This great character is, perhaps, the only sharp dividing line which we can draw at present between the chemistry of dead and living nature.”)”
  9. Werner Gitt (2011). Without Excuse. Creation Book Publishers, 143, 177, 323. ISBN 978-1-921643-41-5. 
  10. David Berlinski (2009). "Was there a Big Bang?", The Deniable Darwin. Seattle, USA: Discovery Institute Press (reprinted from Commentary February 1998 by permission), 476. ISBN 978-0-9790141-2-3. “On the level of intuition and experience, these facts suggest nothing more mysterious than the longstanding truism that lifes comes only from life. Omnia viva ex vivo, as Latin writers said.” 
  11. Klaus Dose (December 1983). Die Ursprünge des Lebens (German). Nachrichten aus Chemie, Technik und Laboratorium. DOI:10.1002/nadc.19830311208.
  12. Werner Gitt (2006). In the beginning was information. New Leaf Publishing Group, 106. ISBN 9781614581208.