@Setanta,
Setanta wrote:
For starters, your claim that life on this planet (the one I'm assuming you inhabit with the rest of us here) originated in submarine, volcanic vents is unsubstantiated by you. I seriously doubt that you can substantiate it, other than, perhaps, with a youtube video. Extremophiles in volcanic vents, the boiling ponds around the geysers at Yellowstone and the ice rivers of Antarctica derived from already existing life forms, and then colonized those environments. There is no good reason at all to believe that they arose independently in such environments.
Obviously everything we 'know' about the distant past is theory built around what can be observed directly in the present and defined as supporting the theories constructed. Imo, science is more about the critical thinking process than about deferring to 'established' theories, so I post this here to engage in critical discussion, not argue about conflicts between established science and science fiction.
I think the farther back you go, the hotter the Earth was. Nowadays we can look at underwater volcanic vents as being relatively segregated from the rest of the oceans and the (cooled) land, so extremophiles are associated with those special hot spots like volcanoes and geysers, but the farther back you go, the less distinction there would have been between those hot spots and the rest of the environments where liquid water was available to support cellular evolution.
Quote:The atmosphere of Mars is so thin that at any appreciable elevation, water will break down into its constituent hydrogen and oxygen. The lowest elevation on Mars has a pressure that varies between 18 and 20 millibars--to put that into our context, the atmospheric pressure at mean sea level on this planet is 1013 millibars. As for Antarctica, it is balmy compared to Mars. The mean temperature on Mars at most elevations runs from 182 K to about 200 K--water freezes at 273 K. The warmest place on Mars is a south-facing slope in the immediately sub-equatorial region of the Martian southern hemisphere, in the daytime, in summer. The temperature on such a sunny slope might, might, reach 21 or 22 C--which is about 70 F. It plunges back into extreme sub-zero temperatures at night.
Are you just noting this or does it have some bearing on what I posted?
Quote:The soil of Mars is so salt that it is doubtful that even halophiles from Earth could survive independently in those conditions. Volcanism ended on Mars more than a million years ago, so even if your silly claim about life arising in volcanic vents were true, it ain'ta gonna happen on Mars. As for the Solar Wind (an inaccurate term), it's not depositing particles to any appreciable amount, but it is stripping away the upper atmosphere of Mars.
First, it's not my silly theory that there could be underground life. There has supposedly been water discovered underground and there are methane vents suggesting some kind of methane-producing activity going on.
As for the solar wind stripping away atmosphere, that happens on Earth too, but the magnetic field protects and holds some ionized atmospheric gas, as well as channeling some solar ions to the poles as aurora. In short, there is no clear separation between solar wind and upper atmosphere, because either can lose material to the other.
It may be that heavier elements of the solar wind get deposited on Mars while lighter ones are carried off. Iron and oxygen are two of the most prevalent elements in solar wind, I believe, and iron oxide is also what makes Mars red, isn't it?
Quote:It is not simply NASA (I don't know and don't care what beef you have with them) who have confirmed this data.
I have no problems with NASA. You don't have to dislike some person or agency to question their theories. Science isn't about agreeing with your friends and disagreeing with your enemies. It's about thinking critically and constructing alternate hypotheses and theories to expand potential avenues for discussion and applying knowledge critically.
Quote:The Russians have landed rovers on Mars. Both the ESA and ISA have satellites orbiting Mars. Britain's rover failed to deploy its solar panels. The ESA had a joint operation with Russia which landed a rover, but it crash-landed. I don't believe the ISA (Indian Space Agency) ever tried to land a rover. The point, however, is clear--there is a wealth of data supporting the narrative of conditions on Mars as I have described them, and from more sources than just JPL/NASA.
Collecting and having data doesn't take the place of analyzing how observed data fit with theoretical models and what other models could explain the same data.
Quote:Come on . . . post the link to the youtube video that inspired you. I could use a good laugh.
No, I read an article that discussed Mars as having a lush ancient past, which has no all but gone extinct. I question whether that's the only possible interpretation of the current situation or whether it might actually be that life is nascent on Mars and it is gradually evolving a hotter core, stronger magnetic shield, and gaining mass/gravity and thus the capacity for a denser atmosphere.
Here's the article that got me thinking about this topic:
https://www.thedailybeast.com/could-life-evolve-on-mars