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Re: martian life
- To: meteorite-list@meteoritecentral.com
- Subject: Re: martian life
- From: Ron Baalke <BAALKE@kelvin.jpl.nasa.gov>
- Date: Mon, 20 Apr 1998 19:08:20 GMT
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- Resent-Date: Mon, 20 Apr 1998 15:07:05 -0400 (EDT)
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>i was just reading an article about ALH84001 and the bacteria- like
>structures published by NASA,and nowhere in the article does it mention
>a possible origin of these structures except from the planet mars,just
>because they were found on a possible matian meteorite doesnt mean they
>originated there,i find it more likely to believe that the supposed
>bacteria propably originated right here on Earth.after all, ALH84001
>fell a little over 13,000 yrs.ago and has been exposed to the elements
>for all that time.I think 13,000 yrs. is plenty of time for Earthly
>bacteria to colonize the meteorite and then fossilize.what do you think.
That is a very good point. If the carbonate globules are 13,000 years or
younger, then you cannot rule out Earth contanimation as a possible
source of the structures. However, the carbonate globules have been
dated at 3.6 billions years old. On that basis alone, you can rule out
Earth contanmination because the carbonate globules were formed well before
the meteorite fell on the Earth.
Ron Baalke