QUOTE (edstrick @ Oct 1 2006, 05:43 AM)
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The Phoenix lander is going to have a quite sophisticated wet-analysis instrument for characterizing soil and icy-soil samples. It will go a long way toward providing meaningful information on the soil-moisture and soil-nutrient-solution interactions observed with Viking's biology experiments.
I've personally had a couple run-ins with Gil Levin as a grad student, and he's an expert evidence cherry-picker and insinuated-inference-maker. I have not exhaustively investigated the soil analysis results and modeling work to understand his viewpoints and how it clashes with other team and research group viewpoints, but I take his opinions with a bagfull of side-walk-ice-melting salt, rather than a grain of salt. One thing I don't recall him ever DIRECTLY, head-on addressing is the total lack of evidence of GROWTH in his instruments results, rather than a heat-sterilizable one-shot chemical reaction.
That's some good info, Ed; thanks for the insight!
The absence of detectable organics was what troubled me (and everyone else, of course) the most. Frankly, that's why I have this concern about a superbug that can eat like crazy. If the VL results were in fact caused by life yet there weren't enough cells to be detected by the GCMS, then that might imply an extraordinarily high level of activity by individual organisms.
Hmm. Although, as you say, there was no evidence for growth. I don't know; maybe Mars life is selfish & doesn't want to have kids in order to maintain its lifestyle?
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Seriously, though, we assume that rampant reproduction is inevitable for microorganisms, but this may not be a universal truth, especially if a given organism has no predators, competition or threats other than environmental variables. Martian bugs might encounter food so rarely that they reproduce only when truly prolonged favorable circumstances are present, remaining dormant for extended periods. (Sounds unlikely to me too, but I'm just throwin' it out there for consideration).