This, to me, is the weakest point of all evolutionary theories that try and exclude divine intervention. The bio textbooks all deny, and quite rightly, the existence of spontaneous generation. But then they do a bit of a backstep and say "except in the case of the very first life form."
Maybe it's just the way I'm viewing things, but science requires that you have a theory that is always right. As soon as it's wrong, even just once, you have to revise it or totally throw it out.
It just seems to me that for abiogenesis (if that's the right term) to have happened exactly ONCE in the history of the world (as the theory of common descent requires) and never again, without the hand of God intervening, is a bit farfetched.
Thoughts?
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"When mankind falls into conflict with nature, monsters are born."
-Professor Hayashida,
Godzilla 1985