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The big open questions. Its something that happened a very long time ago for probably about 4 billion years ago, not long after the earth came into existence about 4. 5 billion years ago. We know the kind of thing it had to be. It had to be the origin of the first cells replicating information, the first gene although it certainly would not have been dna. Dna would have almost certainly come in later and usurped the role of the original replicator so most of the theorizing and i would say perhaps all the theorizing going on now is looking for the chemical event, some kind of a lucky random chemical event which gave rise to a molecule which was self replicating. As i say it would not have been dna. Dna can do its job without protein and protein can do its job without dna so theres a catch22 there. It could have been rna because rna is capable both of doing the job of protein which is being a capitalistic in some sort of an executive function in the cell and rna also can do what dna does

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