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by morsch
2097 days ago
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> We don’t, but we do know that there over the about 4 billion years of life, the first 1 to 1.5 billion years were purely prokaryotic. If it was a common thing to have work out, you wouldn’t expect such a massive amount of time before it occurred. Based on that evidence you could also conclude that it was impossible for it to happen for 1 to 1.5 billion years (because it didn't) and then it was suddenly very likely (because it did). |
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