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he states with little equivocation that life on earth began only once.
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I do not think you can say that. What is probably true is that all current life descended from one entity. It is possible, and very likely in my opinion, that there were other starts all of which died out.
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We have failed to create life in the lab and we should have, given the power of our technology.
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It is difficult to replicate a million years in the lab.
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abiogenesis
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I am not sure abiogenesis is the way to go.
Check out the metabolism first origin of life.
Life has its origin in a repeating cycle of chemical reactions that slowly got more complicated though evolutionary processes. Makes sense to me.