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Hmmm, of the 16 scientists who have replied so far, to me the best thought so far is from Caleb Scharf "will we recognize life when we see it". Most replies are looking for a life form as we know it, or is familiar to us. Maybe because we are limited to looking for what we know. Also, our concepts are based on the mathematics, physics, chemical and biologic models we have developed. Perhaps there are other methods unknown to us, and possibly "life" forms that we are unaware of as they bear no relation to what we consider as living. Mark
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