New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: This forum is accepting new registrations via email. Please see Recruiting Topic for additional information. Write newmarsmember[at_symbol]gmail.com.

#376 Re: Unmanned probes » Cassini-Huygens III - Continued from previous » 2005-02-21 05:22:24

[I know what I'm about to post here should probably be over at 'Intelligent Alien Life', but at least it is about the Saturnian System. (Take it with a pinch of salt.)]

    I suppose you all realize Richard Hoagland has made another breakthrough discovery concerning alien visitations to our Solar System in the distant past?!
    He's discovered that the Saturnian moon, Iapetus, is actually an artificial body, constructed God knows where and parked in orbit around Saturn God knows when. He bases this revelation on the irregular shape of the moon, which is most unusual for a body this big, and on the existence of that 1300 kilometre 'seam' running along its equator.

    Mr. Hoagland quotes a paper written in 2000 by various authors including, he maintains, some Cassini Team members:-

Iapetus: Shape, Craters, Dark Side

T. Denk, G. Neukum, T. Roatsch, K-D Matz, U. Wolf, R.J. Wagner, R. Jaumann (DLR)

    Limb-fitting analyses of Voyager data show that the shape of Iapetus can be described by an ellipsoid with half-axes of 750 km x 715 km, somewhat larger than the IAU radius (718 km). However, note that Iapetus' shape is irregular rather than ellipsoidal, containing large depressions and bulges. Measured radii vary between 700 km and 780 km. An irregularly shaped, Iapetus-sized body is something quite unusual in the solar system. It suggests that Iapetus was already cold, brittle and geologically dead before most craters were formed, presumably very early in the solar system's history.

    He backs up his assertion with the following pictures (among others):-

Deathstar-23b.jpg

Deathstar-Comp2.1.jpg

Denk-The-Wall3.jpg

    Mr. Hoagland believes NASA should cancel the previous plans for Cassini and take steps to investigate this 'artificial moon' more thoroughly.
    He states:-

But, getting back to Iapetus will not be as easy as it sounds – both for technical and political reasons.
           Of all the moons of Saturn (except for tiny, distant Phoebe), Iapetus has the most inclined orbit.  All the other major moons lie essentially in the plane of Saturn’s equator and its rings, and are relatively close to Saturn.  Iapetus’ orbit is tilted 15 degrees to these other orbits … and lies more than 2 million miles away (below) ….

SaturnOrbits.jpg

    All of the above, of course, is featured in detail at http://www.enterprisemission.com/]The Enterprise Mission Website, in case you're interested.
    Naturally, I don't necessarily place any faith in this stuff at all but that Richard Hoagland never fails to give us interesting food for thought, don't you think?    :;):   tongue   smile

Edited by moderator 2022/07/01

#377 Re: Terraformation » Mars Needs Nitrogen » 2005-02-21 03:25:19

Dook, you're talking about large-scale nuclear alchemy. This concept was explored once upon a time in a book by Sir Arthur C. Clarke.
    He predicted that some future society, in which energy is freely available at virtually no cost, would be transmuting elements at will to create whatever physical commodities are required. In that society, everybody will have whatever they want, whenever they want it. The only thing of value will be knowledge because all of mankind's physical needs will be fulfilled and all material goods will be essentially free.

    While I look forward to this technological Utopia, summed up presciently by John Lennon in the immortal words "Imagine no possessions, I wonder if you can, No need for greed or hunger, A brotherhood of Man", we may need to examine the dearth of nitrogen on Mars in more realistic terms .. at least for now!   smile

#378 Re: Terraformation » Mars Needs Nitrogen » 2005-02-20 18:50:20

Yes, there's enough nitrogen to make fertilizer for indoor plant growth - that shouldn't be a problem.

    But, as far as terraforming is concerned, the lack of nitrogen is very worrying. It may be possible to create a respectable atmosphere using CO2 presently sequestered in the regolith and in the Polar caps (say, 500 millibars worth) but an atmosphere like that will be of limited use. It will make the construction of vast domes feasible by alleviating the mechanical constraints of large internal/external pressure differentials, but it won't make a second Earth out of Mars; we'll be permanent dome-dwellers. (This may not be a bad thing, of course, if you're philosophically disposed toward conserving the vast majority of Mars as a red desert.)
    And, if we manage to re-create lakes, seas, and even an ocean, an atmosphere of almost pure CO2 might gradually dissolve in the water and react with other solutes to form carbonate rocks - unless the water is sufficiently acidic to prevent that reaction occurring. You don't get this problem with inert nitrogen.

    It's often assumed by optimistic terraformers that we'll find huge nitrate beds in the Martian crust. This would presumably supply us with nitrogen at the surface, without the need to import it. But I'm not sure how easy it would be, even if we do find these nitrate beds (big if), to persuade them to give up their nitrogen.
    Any chemists or biologists here who know how to go about such a task? Could we engineer bacteria to ingest the nitrate and excrete nitrogen, for example? And how much nitrate do we need to find to produce a 300 millibar atmosphere out of it?
                                                    ???
[P.S. Have any of our satellites around Mars spotted anything remotely resembling a nitrate bed, yet?]

#379 Re: Unmanned probes » Cassini-Huygens III - Continued from previous » 2005-02-20 08:20:20

This is all news to me.   smile
    I don't remember much talk of ammonia on Titan until now.
    In agreement with you, Cindy, and to quote a certain alien with a rather mobile upturned eyebrow: "Fascinating."  :;):

#380 Re: Unmanned probes » Mars Express (MEX) - ESA orbiter » 2005-02-20 08:13:15

This is indeed remarkable news!   smile
    If this paper proves to be correct in its assertions, it opens up all sorts of possibilities. The first thing that springs to mind is the possibility that the first astronauts on Mars might have easy access to frozen water very close to the Martian Equator.
    The second thing that occurred to me, looking at my topographic globe of Mars, is that the region described is at roughly the same altitude, ~2 kilometres below Datum, as the area Spirit is currently exploring, a few hundred kilometres away, in Gusev Crater. If southern Elysium could have a frozen sea comparable in area and volume to the terrestrial North Sea, what does that do for the concept of Gusev Crater perhaps having been an inlet of a much larger expanse of water in the past? And, extrapolating a little further, does that bring the possibility of an ancient Oceanus Borealis closer to reality also?
                                                             ???
    This is heady stuff, all right!

#381 Re: Not So Free Chat » Political Potpourri II - Continued from previous » 2005-02-19 18:35:50

Hi CC.
   I'm afraid I've been having trouble with my interpretation of posts quite a lot lately, so if I've emphasized the wrong aspect of one of your posts, I apologise. Now that you've clarified it, I see your point, which is certainly a valid one.
    But, just in passing, I think it's only fair to recognize the contribution of the Soviet people to Hitler's downfall - a contribution I feel isn't always fully acknowledged. The reason for that comparative lack of recognition of the Soviet effort in the eyes of the West is no doubt tied up with the point you make, that the Soviet Union was really a thinly disguised enemy in allied clothing; a regime every bit as detestable as the one we were all fighting.
    I fully accept that aspect of your comment.

    Thanks, Bill, for going on record as agreeing with me about the Soviet contribution etc.  :up:
    Not unnaturally, I think, this gave me pause for thought and I stopped dead in my tracks to think over what I'd actually said. I couldn't help feeling that, if you agreed with me about this, I may have inadvertently said something I didn't mean!   big_smile  [Just kidding.]

    Hi Cindy!
    It was very kind of you to make flattering comments about my knowledge of history but they're undeserved, I'm afraid. There are only certain areas of history I have a degree of familiarity with, most of the rest being as much a blur to me as it is to any other amateur, of course.
    Some years ago, though, simply because it interested me, I made a fairly extensive study of WWII in Europe and the period leading up to it. I'm sure I've forgotten most of what I learned but some points still stand out clearly in my mind - something I cling to, with an air of quiet desperation, as evidence that Alzheimer's hasn't quite gotten the better of me just yet!  big_smile

    Just to tackle the other main point of these recent posts, I think it's very difficult to paint portraits of alternative histories in Europe in 1944/45, or alternative histories anywhere, anytime, for that matter!
    But, in this case, we should remember that the Soviet forces in spring 1945 were formidable, to say the very least. And Soviet industry was in full war-production mode. As I think I've touched on before, they had upwards of 40,000 T-34 tanks (and were producing 2000 more each month), tens of thousands of artillery pieces, and millions of battle-hardened troops. Patton may have thought he could roll them back to Moscow, as the Germans managed to do in 1941, but I think it would have been the mother and father of all battles to try it.
    An allied drive into Russia might just have succeeded if the German Army could have been pressed into service on the West's side. Although it was a defeated force, the Wehrmacht's main problem was largely one of military supplies and fuel. The Reich's supply of raw materials had been effectively choked off and its industrial base badly damaged. But, if the German military machine could have been resupplied and re-organized quickly enough, their addition to a hypothetical latter-day Grande Armee might well have turned the tide. In fact, many German soldiers, perhaps largely unaware of the grisly excesses of their own government, were convinced that the Allies would do exactly that - amalgamate, at the last minute, with the German Army and press on against the Bolshevik hordes, the 'true enemy of European civilization'.
    But of course, with the liberation of the Nazi death camps fresh in everyone's mind, joining forces with an army that had made genocide possible just wasn't morally and politically feasible.

#382 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-19 07:57:47

Bill:-

I did not mean to suggest this.

    Ah, I see. I misinterpreted your initial comment and you misinterpreted my attempt to avoid misinterpretation.  :laugh:

Bill again:-

Tonight, MSNBC had an article which appears to suggest that any report that NASA believes the methane signatures are strong evidence of life are inaccurate, perhaps even false as NASA denies they are persuaded by the current evidence.
However, the article suggested that the individual NASA employed scientists - - in their personal opinion - - stand by the original report.

    Ah, I see. The individual NASA scientists have interpreted the data in a way that NASA believes is, in fact, a misinterpretation .. unless I've misinterpreted something.  tongue   big_smile

    [At least we've still got the report to look forward to .. er, um .. I think.]

#383 Re: Not So Free Chat » Political Potpourri II - Continued from previous » 2005-02-18 21:12:23

Just a couple of brief comments.

    I tend to take the "Stalingrad was wonderful" thing at face value. As everyone knows, Stalingrad was the high-tide mark and turning-point for Nazi Germany. After Stalingrad - at which the entire German 6th Army was obliterated, the first-ever capture of a German Field Marshal occurred, and 250,000 of Germany's finest troops were killed or captured - it was an almost uninterrupted retreat to Berlin for German forces.
    Although it was a horrible bloodbath that dragged on for months, Stalingrad's conclusion, in January 1943, marked the beginning of the end for Hitler - ample cause for celebration among anti-Nazis everywhere.

    I thought I saw a comment from someone (was it CC?) to the effect that America beat Nazi Germany, then handed the country back to the Germans.
    I think it's often the case that the Soviet Union's contribution to the defeat of Hitler is overlooked or at least grossly underestimated. 3 million German troops invaded Russia in 1941 and drove hard and fast into the heart of the Soviet Motherland. By the time of the D-Day landing in June 1944, the Red Army and Soviet industry had recovered from this almost unimaginable mauling at the hands of the cream of the Third Reich's military forces, including the notoriously effective Waffen-SS Divisions.
    Even if D-Day had failed, it's extremely unlikely that the release of some 50 German Divisions, stationed in France, to fight on the Eastern Front, would have done any more than delay the inevitable march of Soviet troops into Berlin.
    In fact, it could be construed that the landing of Allied troops at Normandy was as much to prevent Stalin taking over all of Western Europe as it was to establish a second front against Germany.

#384 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-18 20:23:16

Thanks, Cindy, for bringing that recent 'correction' from NASA to our notice. Presumably, the report was filed by an over-enthusiastic journalist who pounced on half-baked second-hand information and took it all too seriously.
   [Or NASA, scared witless that its long-standing cover-up about life on Mars was about to be blown wide open, got hold of poor Dr. Carol Stoker and put the silencers on her. You know, the old story: "Nice little retainer you get from NASA, eh Carol? And a nice little family you have at home, too. It'd be a pity to see any harm come to all of that, wouldn't it?!"
     :laugh:  Just like all those conspiracies you see in the movies!!]


    Thanks, too, Bill for clarifying your opinions about hypothetical Martian life. In our present state of ignorance, of course, almost any version of the sequence of events on early Mars is as valid as any other.
    The sequence of events on Earth, though, is somewhat better understood because we have access to more evidence. This is why my attention was drawn to your comment about life appearing on Earth a billion years ago.
    As I understand it, there is good evidence for bacterial life on Earth about 3.4 billion years ago. The solid evidence is presented in http://www.cnn.com/TECH/space/9909/03/s … .html]THIS ARTICLE, and consists of an actual fossil of the physical form of the bacterial colony; the remains of which are recognized as stromatolites.

                         fossil.jpg

    (Quote:) The 1.25 meter, "egg carton" shaped rock, retrieved from the remote Australian outback in July[1999], contains life forms believed to be 3.46 billion years old.
"They were the earliest life forms and probably the only form of life on Earth for the best part of two billion years," said Dr. Kath Grey of Macquarie University in New South Wales, a member of the team that discovered the fossil.  (Unquote.)

    But other evidence has helped to push the date for the earliest bacterial life on Earth back to maybe 3.85 billion years. (Though it's important to emphasize that the data are still disputed in some quarters and the conclusions are therefore still, technically, equivocal. It should be noted also that this applies even to the above stromatolite evidence from 3.46 billion years ago, too, although the majority of scientists accept it as fact.)
    There are two articles which, I think, give a good account of this evidence. One of them is from 1998 and the second, which presents data tending to bolster the first, is from just last month:-
    http://www.x-tronix.com/applic5.htm]Article 1
    http://rednova.com/news/display/?id=122138]Article 2

    Although it's difficult to state categorically just when life appeared here on Earth, because there's always room for the data to be questioned, my reading on the subject indicates that the majority of researchers are reasonably satisfied that bacterial life, much as we know it today, existed here 3.8 billion years ago. The inference is drawn that more primitive living precursors to that life were probably in existence at about 4 billion years ago.
    Interestingly, this period of Earth's history lies just prior to the end of what is called the 'Late Heavy Bombardment' of our Moon, which ended at 3.8 billion years ago, a bombardment assumed to have affected Earth just as much as it did Luna. And yet, it appears the bombardment didn't extinguish life here - an indication of how fiercely tenacious life really is once it gets a grip somewhere.

    If we assume that the purported traces of biogenic material in the Martian meteorite ALH 840001 are actually of biological origin, then Dr. McKay's suggestion that Mars may have become more conducive to the development of life, sooner than Earth did, starts to look more plausible. From memory, ALH 840001 is some 4.5 billion years old and seems to be telling us that life appeared on Mars very quickly after the planet formed.
    If all this is true, a big if (! ), then it looks more likely that life originated on Mars first, before being propagated by impact transfer to Earth.

    But, Bill, the main point of my post (amid cries of "My God! Don't tell me he's actually getting to the point, at last!!  big_smile  ) is to address your apparent belief that life on Earth is only about 1 billion years old.
    I don't think there is any reasonable evidence to support this notion, while there's a great deal of evidence which seems to refute it. Certainly, as far as I can tell, there's no serious doubt at all that complex cellular life was flourishing here at least 2.7 billion years ago.
    If you are aware of all this already, then I apologise for the needless repetition. But then it begs the question - if you know all this, what leads you to the conclusion terrestrial life is only 1 billion years old?
                                               smile

#385 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-17 23:57:21

Bill:-

But my instincts remain that =IF= living microbes exist today on Mars they are the resilient survivors of a once flourishing planet engulfing biosphere, which perhaps flourished and 99.99% died off before life arrived on Earth. A billion years ago.

    Forgive me if I seem obtuse but I'm uncertain how to interpret your meaning here, Bill.
    You appear to be saying that the hypothetically flourishing Martian biota we're speculating about could have largely died out maybe a billion years ago, possibly leaving isolated bacterial remnants underground. And it looks like you're placing the 'arrival' of life on Earth at some time close to, but perhaps slightly after, that event.

    Am I on the right track or have I got it all wrong?

#386 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-17 18:39:24

I'm inclined to agree with Bill's interesting speculation about a Martian Gaia. If we assume that microbes got a foothold on Mars, say, 4 billion years ago, or perhaps more, then they may well have diversified to create a self-perpetuating system like Earth's in some ways.
    On the other hand, CC's counter-argument is logical - especially the part about diversification into macroscopic multicellular life, which isn't well understood even on Earth. If we're in the dark about what spurred the sudden flowering of multicellular life here some 590 million years ago, we're obviously in big trouble trying to extrapolate that to the Martian situation.

    But then again, NASA's Dr. Chris McKay has suggested that Mars may have evolved, geologically, at a faster rate than Earth because of its smaller size. Earth, being larger, accumulated more of the lighter reducing gases than Mars did during its formation; gases like carbon-monoxide, ammonia, and even hydrogen. These gases would have been injected into Earth's atmosphere, via volcanism, for a much longer period here than on Mars. Thus, while cyanobacteria on Earth were producing oxygen, that oxygen, for maybe 2 billion years, was reacting with the reducing gases and not contributing to an oxygen-rich atmosphere. It was 'only' about 2-3 billion years ago that reducing gases petered out, leaving the more familiar volcanic gases we see today, CO2 and water vapour. This allowed the oxygen produced by the cyanobacteria gradually to accumulate in our air and may have helped ultimately to allow, if not actually trigger, the evolution of larger multicellular creatures.
    Dr. McKay suggests Mars vented all its reducing gases much earlier, possibly allowing cyanobacteria to produce an oxygen-rich atmosphere billions of years before Earth.
    If this was so, and Bill's Martian Gaia hypothesis is also true, then one can imagine a vastly accelerated evolution of complex life on early Mars. In fact, the evolution of life generally may be considerably faster on relatively low-gravity planets everywhere. Perhaps Earth is an unusually massive rocky planet and its 'explosion' of complex life occurred much later than average(?) .. who knows?

    So it's quite conceivable, given what we know of planetary evolution, that Mars could have had a very diverse ecosystem for hundreds of millions of years before Earth left the 'bacteria only' phase. Since then, of course, the available ecological niches on Mars must have dwindled dramatically because of atmospheric loss and drastic cooling of the environment, which would obviously tend to create the restricted conditions of CC's argument.
    And, for the reasons we've mentioned, that doesn't necessarily preclude the discovery of rich fossil-beds from a balmier early period, as Bill suggests might exist.

    I think our present knowledge of Martian history is sufficiently scanty to allow for many possibilities and both Bill and CC could be right at the same time about this.
    And I, for one, haven't all together given up on seeing a macroscopic fossil in one of those so-called 'microscopic' images from Spirit and Opportunity.
                                                     :;):   smile

#387 Re: Science, Technology, and Astronomy » Anti-Matter & CERN Laboratory » 2005-02-16 23:07:02

CM:-

Well, it's about time.  I've been waiting more than a decade for further progress toward antimatter ice.

    Me too!
    It'd be a real talking-point to put it in martinis at your next party. Should be quite a blast.
                                                 cool

#388 Re: Not So Free Chat » Ten Thousand Martians » 2005-02-16 23:00:18

I think it's very good; very readable!   :up:
    It seems to have a little of the Arthur C. Clarke style to it, if you ask me. And that's no bad thing, I suppose, since it didn't seem to do Sir Arthur any harm!  smile

    [About three-quarters of the way down, I saw a typo in "The shear size and power of the Goliath was enough to awe .. ".
     That should be "sheer", of course.
     A very small point, I know, but you did ask for comments.]

#389 Re: Science, Technology, and Astronomy » mars life, - just the same methane stuff, » 2005-02-16 22:40:29

Oops, sorry Flash!   sad   :-

As for the point about environmentalist and such . . . ouch ???   :hm:

    I assume from this comment that you're an environmental activist. If so, I'd like to make the point that I'm actually quite 'green' myself in many ways - but only when I can see the sense in whatever the activists are .. well, 'active' about!

    I believe there are various issues which environmentalists would do well to examine in detail before making those knee-jerk responses I mentioned. For example, I think nuclear power production should be revisited objectively; without all the wild-eyed and emotionally charged reactions we've come to expect. This is especially true today, in view of all the fuss over rising CO2 levels and global warming, when it's not obvious that alternative clean-energy sources will be able to provide a viable substitute in the near future. But I'm not here to argue that point per se.

    As for Mars, I strongly suspect there are people with alternative agendas out there who would be more than happy to use Martian microbes as an excuse to curtail human space exploration. Some of those people are just plain Luddites, of course, but others probably include space scientists whose careers depend on a well-funded robotic space program or on space-based telescopes etc.
    I was just trying to bring this personal concern of mine to your attention but I guess my frustration with the wilder elements of the environmental movement came through too strongly!   :;):

    My apologies if I inadvertently insulted you.
    I certainly didn't set out to do that.   smile

#390 Re: Not So Free Chat » Name The Emoticon Band » 2005-02-16 19:14:29

How about:-

    M. Pakt and the Craters

                     or

    Dustie Devil and the Dunes

                     or

    Mike Robe and the Methanogens
                                                           ? ? ?     tongue

#391 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-16 18:58:46

By the way, Dickbill supposedly posted at the thread next-door to this one, '(Non-)Official Life on Mars Poll', on Feb.16 2005.
    I can't seem to access that post, for some reason.   ???
    Anyone else having the same trouble?

#392 Re: Life on Mars » Perhaps Shaun Barrett - is RIGHT! :-) » 2005-02-16 18:53:59

Gosh!
    My name up in lights as part of a thread title.  yikes
    Fame at last!! big_smile

    Thanks, Bill, for drawing our attention to that article. I hadn't spotted it. (And thank you for bringing me as close to fame as I've ever been, or as I'm ever likely to get, incidentally!  sad   :laugh:  )

    Yes, I've been convinced for a long time now that there's life on Mars because I can't honestly see a logically sound alternative to that viewpoint. This article just adds to my conviction.
                                            smile

#393 Re: Science, Technology, and Astronomy » mars life, - just the same methane stuff, » 2005-02-16 18:36:27

Flashgordon:-

I for one can barely care if there is bacteria on mars, but if it increases science and human colonization funding, I suppose I'd be excited.

    Hi Flash!
    I'm not sure whether you've been following some of the more obscure debates in other threads here about how the discovery of life on Mars could affect future missions(?). But anyhow, just to recap, proof that Martian bacteria exist could either spur exploration, or hamper it severely.
    As you know, there are people out there paid to worry about forward and backward planetary contamination issues. If those issues go away, those people don't have a job. It's therefore in their interests to play up the contamination possibilities to the hilt, regardless of the damage it might do to Mars missions.
    The contamination worry depends on Mars having produced microbes which are either a new branch of life, and therefore unique and vital to our understanding of what life really is, or microbes which are ravenously predatory and potentially capable of destroying life here on Earth. In the former case, we mustn't contaminate Mars; in the latter case, we mustn't allow Mars to contaminate us!
    They've got a tailor-made, knee-jerk, scare-mongering reason to stifle mars trips either way, and they'll have the full mindless support of the environmentalist movement no matter how the dice may fall. All they need is hard evidence that there's something alive on Mars and the circus can begin.

    Another way that Martian life can put the kibosh on human missions, at least for a very long time, is the Sample Return Mission (SRM) program. This program entails recovering samples of Martian regolith using robotic probes and examining them in special bug-containment facilities on the Moon, in Low Earth Orbit, or right here on the ground.
    A reasonable blanket reconnaissance would require, I estimate, maybe a half dozen missions, each of which has been predicted to cost about $2 billion. Assuming NASA can afford only one of these ambitious missions every launch window, and assuming no failures, this SRM program is likely to take at least 12 years and cost about $12 billion. And I haven't even factored in the cost of the state-of-the-art containment facilities yet!
    Optimists think the first SRM might lift off in about 2014. If so, the program should be grinding to a halt in about 2026, assuming all goes well.

    There are many people who recognize all this as a monumental waste of time and money. And I'm one of them.
    There is powerful logic which indicates that any Martian life has long been mixing with life here on Earth through the medium of almost constant impact transfer of crustal material between the two planets over the past 4.5 billion years. Whatever life exists on Mars, it would long ago have taken over Earth, if it were so inclined .. in fact, it may well have actually done so about 4 billion years ago! Or the reverse may have occurred.
    The chances of a totally different type of life existing on Mars are vanishingly small. And the idea that any Martian life is poised to devour terrestrial life, in some kind of microbial 'War of the Worlds', is patent nonsense. If there were any chance of that happening, it would have happened long ago.

    As far as human exploration and colonization of Mars is concerned, our best hope is that Mars is found to be sterile. Then at least part of the anti-space, environmentalist, contamination-jobs-for-the-boys argument will be neutralized.
    Unfortunately, that is very unlikely, at least in my opinion (and the opinions of some other people much smarter than I'll ever be). The fact that there's life here means life must either have developed on Mars, and transferred here, or was transferred to Mars after developing here. Given that life is nearly impossible to eradicate totally, once it is established, that life must still exist on Mars.

    When proof of Martian life is discovered - probably quite soon now, I suspect - we, as Mars Society members, should be prepared for the storm of anti-Mars propaganda and misguided environmental activism.
    I think, Flash, that we should all care about whether life exists on Mars because it's likely to make an enormous difference to the dreams of so many of us here.
                                                       ???

#394 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-16 00:36:08

I definitely see your point of view.  smile
    And, given the circumstances, it's a considerably more realistic way to look at it than my way, that's for sure!  big_smile

    Nevertheless, as you know, I'm a confirmed terraformer and my personal feeling is there'd be more variety and beauty in a revivified Mars than in the starkness of its present state.

    But still, it would be a sad and boring world if we all thought alike, wouldn't it?!  smile

#395 Re: Life on Mars » More fossil-like images from Spirit - Wierd rock looks like brachiopod imprint » 2005-02-15 18:46:37

Hi Reddragon, and welcome to New Mars!   smile

    Thanks for the comments on 'my' Martian arthropod. I'm not sure of its exact size but, yes, very small is a fair assessment! (Beware of the term 'microscopic', as used by NASA to describe these small-scale images. They're small, all right, but you won't be seeing any bacteria-sized objects in them.)

    I checked Google for a terrestrial comparison and found that Earth's smallest known spider is an orbweb species from Samoa, with a body variously reported as 0.30 to 0.43mm long (between 1/100th and 1/50th of an inch, if you're American.)
    I think the Martian spider I discovered, lurking in that rock crevice, would be comparable in size.

    As for the likelihood of finding a creature on Mars which resembles terrestrial arachnids, I agree with you that such convergent evolution can't be ruled out - assuming, of course, that any evolution took place on Mars at all!

    We have to remember that there are people out there who think my Martian spider is just a trick of the light and shadow. And, while you and I might regard these people as being totally unreasonable, it's just conceivable they may have a point!
                                              big_smile

#396 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-15 17:08:29

Cindy:-
    "The sky was blue in my dream too...but of course blue is the only sky we've ever seen."
    Hmmm .. true.
    Probably wishful thinking as much as anything else. Or maybe a premonition of things to come? ..  :;):

    I've never really thought of Mars' present state as being it's natural state; my 'Default Visualization' of Mars is quite different. I often see it with a blue sky, lakes, rivers and seas - like Earth in many ways but less stark. The sunlight is softer and less glary, water flows more gently, and the waves on the beaches roll in with less urgency, majestically - their pounding on the sand familiar but more muted in the cool thin air. Everything looks as it should .. but not quite. It's a world so reminiscent of our own but, at the same time, different .. alien. There's an ethereal, almost dream-like quality to it that's not easy to explain.
    In fact, if someone doesn't 'get it' without an explanation, an explanation probably isn't going to help.

    I guess you just have to be a more-than-slightly-delusional Mars nut!   tongue

#397 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-15 07:10:17

It must be the season for it, Cindy!

    A few nights ago, I dreamed my wife and I were both on Mars.
    I was at the bottom of a reddy-brown sandhill, in short pants and a T-shirt mind you(!) .. no pressure suit. I was kneeling down and fossicking in the sand, which I remember was damp and gritty at the base of the dune because it was sticking to my bare knees.
    All of a sudden, I found something akin to a large snail or some kind of spiral shellfish. As I picked it up, I noticed something quickly disappear inside the shell .. it was alive!

    I leapt up, brandishing this incredible find in the air, and started running up the sandhill toward my wife, yelling something about the "greatest discovery in the history of science"!!   cool 

    It's funny but, at the time, it didn't seem strange to me that I was warm, comfortable .. and breathing unaided on Mars, and that the sky was blue!
    Weird!!   yikes    smile

#398 Re: Not So Free Chat » Name The Emoticon Band » 2005-02-15 06:42:00

Ummm,
               "Terry Former and the Colonists"

    [ ... Hastily dives for cover!!   tongue  ]

#399 Re: Not So Free Chat » Name The Emoticon Band » 2005-02-15 06:01:52

How about "Heavy Lift and the Boosters"?   cool    big_smile

#400 Re: Not So Free Chat » Happy Birthday Dr. Smith- Nov. 6th » 2005-02-14 05:20:44

Yeah, come back Algol!
    But have a great Birthday first .. then tell us all about it!
    Many Happy Returns!!!
                      :band:

[Hmmm. Yep, Rik. I'm pretty sure it's the same band again.  :;):  ]

Board footer

Powered by FluxBB