Re: Have aliens visited earth?
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Not when the search space is as large as it is. There is an insane number of DNA combinations. Most of them are junk. Hitting upon ones that lead to complex life is rare.
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I used to think this. Then I started doing radiation work in a wetlab. Given the right conditions, evolution occurs with amazing speed.
Ugh... been through this a dozen times before. If it was anyone but you I wouldn't be posting at all.
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