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- Newsgroups: sci.space
- Path: sparky!uunet!boulder!ucsu!spot.Colorado.EDU!knapp
- From: knapp@spot.Colorado.EDU (David Knapp)
- Subject: Re: Seeding Mars with life
- Message-ID: <1992Aug14.015412.1037@ucsu.Colorado.EDU>
- Sender: news@ucsu.Colorado.EDU (USENET News System)
- Nntp-Posting-Host: spot.colorado.edu
- Organization: University of Colorado, Boulder
- References: <9208120143.AA07834@cmr.ncsl.nist.gov>
- Date: Fri, 14 Aug 1992 01:54:12 GMT
- Lines: 64
-
- In article <9208120143.AA07834@cmr.ncsl.nist.gov> roberts@CMR.NCSL.NIST.GOV (John Roberts) writes:
- >
- >-From: knapp@spot.Colorado.EDU (David Knapp)
- >-Subject: Re: Seeding Mars with life
- >-Date: 11 Aug 92 15:38:58 GMT
- >-Organization: University of Colorado, Boulder
- >
- >-In article <20625@sbsvax.cs.uni-sb.de> dietz@cs.rochester.edu writes:
- >->Even the "vent" organisms are exploiting the chemical gradient set up
- >->by photosynthesis (they oxidize the reduced chemicals coming out of the
- >->vents), and are therefore not completely geothermally powered.
- >
- >-The do not comsume photosythesized materials. (at least according to National
- >-Geographic...)
- >
- >I think the point Paul's trying to make is that the organisms take advantage
- >of oxidizing chemicals (perhaps oxygen among them) produced by photosynthetic
- >life. I don't know enough on the subject to confirm or deny that. I have
- >read that some bacteria get their energy by some chemical change in iron
- >compounds, and that others get it by converting one sulfur compound to another,
- >and it would be helpful if Paul would comment on whether both of these are
- >tied in with compounds produced by photosynthesis.
-
- You say *the* organisms. Perhaps you mean most Earth organisms? I agree. Do
- we know that there *isn't* any life for sure on Mars? No. If there were some
- type of bacterial or fungal (or new class) of life there, do we know what
- effects Earth life would have on it? No, we cannot know that. Are we
- certain that no life form from Earth could survive *anywhere* on Mars? No,
- of course not. We don't even know what 'most' of Mars is even like. With
- so many questions unanswered, don't you think it is prudent to proceed with
- the utmost caution?
-
-
- >
- >-If we get cocky and think we can forcast everything that might ever happen
- >-concerning life on another planet or moon, we could quite easily destroy our
- >-ability to detect it or study it. You might not think that would be a waste,
- >-but luckily, NASA and ESA (and many others) do. For the cost of creating a
- >-sterilization policy, we insure a better possiblity of finding life if it
- >-exists on Mars. We've already mucked up this planet enough with ego-
- >-centricity, I don't think it's a bad thing at *all* to treat the only other
- >-planet in our solar system, which might be able to support humans, with kid
- >-gloves.
- >
- >If there were some cheap and easy way to get humans to Mars in the near
- >future, I'd say we should forget about Mars contamination issues, and go
- >for it. However, that does not appear to be the case, so an argument can
- >be made in favor of playing it safe with unmanned spacecraft.
- >
-
- Depending on what you call 'near future', I agree. But we can also do *that*
- with a high degree of decontamination so our studies while we're there are not
- possibly hindered by Earth organisms.
-
- We have *much* ground work to do with unmanned craft before that could happen
- anyway.
-
-
-
- --
- David Knapp University of Colorado, Boulder
- Highly Opinionated, Aging and knapp@spot.colorado.edu
- Perpetual Student of Chemistry and Physics.
- Write me for an argument on your favorite subject.
-