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starship-design: Re: Aliens, why haven't they contact us?
Jim wrote:
>Just a thought to consider folks. All living organisms on this planet,
>including viruses have DNA and RNA constructed from the same four
>proteins, adenine, cytosine, guanine and tyrosine. (And I do mean ALL
>life forms on this planet, from viruses to trees to us). The chances
>that an alien microbe, or anything else, would use these same proteins
>seem rather small,
What other building blocks do you suggest? (trick question :)
>thus rendering them and us relatively harmless to each
>other since we cant read each other's cellular codes.
Well if they start using our atoms, then that can be a serious threat.
Timothy