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Question
How long does it take to create intelligent life out of microbial life in the fastest possible way where the planets climate is stable?
We can't answer that question, since we have only one example of life to study. On Earth the time span from the first multicelled life to intelligence was a bit less than a billion years, but that really doesn't help answer your question about the "fastest possible way".
David Morrison
NAI Senior Scientist
July 15, 2008
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