Re: Non-nucleotide based life

On Jun 25, 5:00=A0am, "Alan Meyer" <amey...@xxxxxxxxx> wrote:
If I interpret your question narrowly, the key phrase seems to me
to be "on earth". =A0

Yes, I was particularly interested in that scenario, because while
it's entirely possible that the basic "principles" of what defines
life are the same in extra terrestrial conditions, it's also possible
that the principles themselves are vastly different in ways we're yet
to discover/imagine.

The best answer I have seen to those questions is that any
bioactive organic molecules that might serve as a basis for
evolution would simply be lunch for all of the existing bacteria
and other organisms out there. =A0In the presence of existing,
highly evolved organisms, they would not have the time to undergo
the evolutionary process.

Unless, I suppose, the alternate life forms were based on elements (or
molecules) that are largely useless to (or that cannot be easily
"fixed" by) existing life forms.

At any rate, those are my inexpert speculations.

Nice analysis, actually.

.

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