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akuma587 said:

And while abiogenesis has its strong points, its also entirely possible that life originated on earth from an extraterrestial source, such as bacteria from a meteor. We certainly have been hit by thousands if not millions of them, particularly in the earlier stages of the Earth's life.

Actually even ET origins for life on earth don't preclude the possibility of abiogenesis, it just abstracts the question back one level.  At some point the life had to pop up from non-life and whether it was on earth or not abiogenesis is a possible answer.



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