More results for the possibility of Life on Mars - Page 8

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Kevin Author Profile Page



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Reply: 141



PostPosted: May 27, 2011 9:04 AM 

Reply 136, well I finally got to read the Tome! Very interesting I never really thought water could be formed by heat coming from the surface melting the ice. That water is thought to rise to the surface and sublimate making up the H2O content in the atmosphere creating clouds, fog and frost. Pole facing slopes can become warm enough to melt ice and under certain conditions 7mb - 10mb can occur so "leakage" happens as seen on some crater walls. Internal heat could also melt the ice in porous rock 3km - 5km down. There is less water ice at the equator than near the poles, manned missions would need to camp out at the latter to ensure a good supply for life support and manufacturing fuel. Now then could there be some microbes a la the Antartic extremophiles somewhere in these vast frozen lakes/seas?

LWS


Posts: 3062

Reply: 142



PostPosted: June 1, 2011 7:24 PM 

New nematode living in extreme environment on Earth

http://www.the-scientist.com/news/display/58187/

Winston

Kevin


Posts: xxx

Reply: 143



PostPosted: June 5, 2011 8:09 AM 

It is amazing how many examples of Extremophiles we are now discovering throughout our Planet, it simply throws the whole theory of how and what life requires to exist. Astobiologists must be thinking anything goes, it seems life can adapt to just about any kind of environment you chuck at it. It is thought Mars has liquid water beneath the surface at similar depths to this mine, this find once again shows Mars could support life and not just microbial species.

LWS


Posts: 3062

Reply: 144



PostPosted: June 6, 2011 7:53 AM 

Kevin;
My sentiments exactly. But, in addition, I think that several examples of mars life on or just beneath the surface have been already imaged by Oppy and Spirit. We just haven't recognized them and don't have the requisite instrumentation to do so. Also, the cognoscenti continue to throw cold water on anything that suggests that Mars has an active ongoing water exchange at the surface and totally ignore the images that suggest such recent water activity, preferring to propose spurious hypotheses of current day images having been omnipresent for billions of years.

Winston

Kevin Author Profile Page



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Reply: 145



PostPosted: June 6, 2011 11:42 AM 

Indeed Wilson,

We have seen what look like fossils on several rocks they look like Crinoids or Tape Worms, it gets shot down as "it's just a rock" scenario. The problem is the missions do not go there to look for life itself but to see if the conditions are or were ok to make life possible, water, organics etc.

But what does all that mean now when things here on Earth live off Arsenic, Sulphuric Acid, exist in almost zero oxygen environments or with no sunlight. So what exactly are we looking for?

The paper Horton posted in this thread clearly shows there is every possibility of water making it to the surface and that there is some sort of water cycle going on. We have seen water leaking from crater walls, ice caps melt and grow back, fog, cloud, frost. Some of this is CO2 and some H2O.

As far as I know MSL and ExoMars will not be looking for life nor will the missions that follow. There is nothing on the board for a manned mission. It is almost as though someone is hell bent against finding life elsewhere even though it is inevitable that we will.

Barsoomer


Posts: 344

Reply: 146



PostPosted: June 6, 2011 11:47 AM 

There have been proposals to put a polymerase chain reaction (pcr) test kit on some future Mars probe. This could detect and amplify very small traces of DNA, directly confirming Mars life and beginning a study of its genetic characteristics.

Barsoomer


Posts: 344

Reply: 147



PostPosted: June 20, 2011 6:21 PM 

link

Shells developed by life during the harsh environment of Snowball Earth. Hematite might make good shells...

LWS


Posts: 3062

Reply: 148



PostPosted: June 20, 2011 9:06 PM 

Barsoomer;

Very interesting article. Suggests that there might be some possibility of there being a direct connection between the blueberries and some form(s) of microbial life that is not directly evident in the MI images but that is suggested by the very small uniform particles (some might call them discrete dust particles) that are always associated with the berries on the soft rock surfaces.

Winston

Kevin Author Profile Page



Posts: no

Reply: 149



PostPosted: June 21, 2011 5:16 AM 

Look forward to reading the letters when they come out, it is tantalizing stuff and opens up new thoughts on what the blueberries might be and why they formed.

It just goes to show how difficult this sort of work would be on another World as these scientists could roam about, find the right type of rocks and then return them to a lab. To do that on a sample return mission is going to take some doing.

What must also excite a few astrobiologists is this makes a good case for missions to Europa and Enceladus.

Barsoomer


Posts: 344

Reply: 150



PostPosted: June 22, 2011 10:55 AM 

Even if the berries are concretions, the incredible profusion of them at Meridiani would demand an explanation. One possibility is the widespead occurrence of some kind of small particle that served as a "seed" or nucleus around which a concretion could grow. The nucleus could have had an organic origin.

Kye Goodwin


Posts: 1166

Reply: 151



PostPosted: June 22, 2011 12:47 PM 

LWS, re your 148, Yes, I've noticed too that crowded loose spherules are always associated with soil. Here is a recent example from the annulus of Endeavour Crater that shows the same pattern that we have seen all along the Meridiani traverse:

Areas of bright rock that appear entirely bare of soil host only widely spaced spherules. Areas with even a little soil over rock can have fairly crowded clusters of spherules. Areas with deeper soil in the spaces between rock surfaces generally host uniformly crowded spherules. Of course one simple explanation could be that the clustered spherules on rock create a soil trap by slowing the wind. This aeolian scenario probably satisfies most people, but I have my doubts. For one thing it never looks much like the spherules are protecting the soil, at least there is never any indication of wind direction, such as soil accumulating behind (down wind of) individual spherules or on the lee side of the spherule clusters. Another observation that makes me wonder is the remarkable consistency of the pattern from place to place.

LWS


Posts: 3062

Reply: 152



PostPosted: June 22, 2011 1:52 PM 

Barsoomer, Kye;

I agree totally with your submissions at 150 and 151.

In addition, I find it somewhat strange that wherever we can see the structure in the "rotten" rocks of Meridiani that it appears that the berries are nicely arranged in a HOLLOW beneath the eroding "outer layer" of the rock (i.e. the wind appears to operate inside the immediate subsurface layers and hollows out the soft rock leaving the berries in typical repeating patterned distributions). Why would aeolian erosion do that and leave the berries in distinct repeatable patterns and not jumbled together? Indeed why are the berries seldom jumbled in a chaotic pattern anywhere in the various areas observed in meridiani?

Winston

Anoymous Cow


Posts: xxx

Reply: 153



PostPosted: June 23, 2011 10:57 AM 

Martian blueberries are chondrules of meteoirites.

Barsoomer


Posts: 344

Reply: 154



PostPosted: June 24, 2011 12:38 AM 

Crowded loose berries on outcrop.

anonymous cow


Posts: xxx

Reply: 155



PostPosted: June 26, 2011 4:28 AM 

Epithelia Found in Martian Meteorite Lafayette

http://blog.nownews.com/article.php?bid=12363&tid=1384615

ATP


Posts: xxx

Reply: 156



PostPosted: June 26, 2011 6:56 AM 

Epithelia Found in Martian Meteorite Lafayette

http://ireport.cnn.com/docs/DOC-623844

John Henry Dough


Posts: xxx

Reply: 157



PostPosted: June 27, 2011 10:51 PM 

Somewhere there is an explanation.The blueberries are tied in with the dunes also bedrock,
there is a piece or two still missing,

I feel there is interaction of a constantly changing surface on Mars,
I firmly believe this will be proven,actually it is being done so by,dx,,mps,dana,bill,john,hort,,,,and the rest.Unless I am completely miss-understanding the last months posts.

It is all a matter of knowing where and how to look.
jhd.

MPJ


Posts: 250

Reply: 158



PostPosted: June 29, 2011 3:57 AM 

This reads somewhat like someone is talking about Mars in the near(?) future:

Each colonized halite rock is a separate "island" of life. And yet similar communities of organisms have been found to inhabit halite rocks at sites separated by hundreds of kilometers. How these microbes find their way into the halite is a mystery.

DiRuggiero suspects that the soil (dust...-MPJ-) acts as a seeding mechanism for colonization of the rocks, that bacteria are alive in the soil, growing, albeit just barely, "below detection limit," with "maybe a couple of cell divisions in a thousand years."

She suggests, although she doesn't yet fully understand the dynamics of the process, that wind and moisture occasionally do transport these organisms to the halite and other rocks in the desert (quartz, gypsum, rock varnish), where they find a more suitable environment for growth. Comparing in detail the microbial populations in the soil to those in the rocks is one way she hopes to test her theory.

[link]

llt


Posts: xxx

Reply: 159



PostPosted: July 7, 2011 5:08 AM 

Three years ago, NASA’s Phoenix lander ceased activities on Mars. By that time Phoenix lander had sent back dozens of good atomic-force microscopies (AFM) that magnified Martian particles up to 100,000X (notes 1 & 2). The microscopies are by far the best evidence for Martian life in NASA’s history. However, two years after that, NASA still has not made public those microscopies. Why?

Could NASA have blocked their publication? I considered the following reasons for the delay in releasing the AFM microscopies to the public and found NASA must have other unexposable reasons.

1. Lack of fund: Impossible. Considering the extreme importance of the AFM, relatively small is the fund needed for preparing, studying, interpreting the microscopies.

2. Lack of time: Impossible. It does not take over 12 months to prepare, study, and interpret 12 good microscopies, unless they were delayed by incompetent people or people with self-conceived vested interest.

3. Lack of experts: Impossible. There are many people who can readily identify fossil cells, even those found in dinosaur turds. If the microscopies were handed to a geologist for analysis, he should know in a few days that the job is for an anatomist rather than for a geologist, unless the geologist pretended he could do the job.

Note 1: Dr. Peter Smith, the Principal Investigator for the Phoenix mission, publicly revealed this information. In all, about 100 atomic-force microscopies were beamed back to NASA.

MPJ


Posts: 250

Reply: 160



PostPosted: July 7, 2011 6:17 AM 

Re 159: For me personally evidence is hardening that NASA, for some weird reason, is blocking or actively hindering the discovery of ET-life especially in regards to Mars. Latest addition to this: despite its more or less an open secret that Mawrth Vallis has the greatest potential of discovering traces of current or past life on Mars they seem to send its next Rover anywhere else but Mawrth. I wouldnt be to suprised if really send it to Gale - not even Eberswalde which has been my second favorite of the landing site after Mawrth. Confused

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