Originally posted by odyseusz
Originally posted by ArMaP
These things have been noticed in many Mars photos for some time, but they can analyse it because what we see on those photos is how things are after that something flowed on those places, as far as I know there isn't any photo of it happening (but I don't know if there would be a way of knowing that it was happening at the time).
I have noticed that on some photos it looks like those liquid flows come from the joining between the present day surface and what looks like a different ground layer, like if something was covered by the dust we see today.
I will try to find one of those photos.
PS: Imagir, use only the [img] tags, that way the image will have a scroll-bar and will not mess-up the page layout.
[edit on 31/10/2009 by ArMaP]
Do you all have amnesia? There are several dozens of threads on this forum about that phenomenon and we already saw photos of that process in action. It manifest as a geyser but it's not water probably but methane or something else because in such low atmospheric pressure liquid water
doesn't exist. Ice become directly a vapour and vapour become en ice. There is possibility that liquid water exist on Mars but beneath the surface where the pressure is higher.
Artistic vision of that phenomenon.
And the real photo.
[edit on 31-10-2009 by odyseusz]
Water boils away into vapor with low pressure, and since mean surface level pressure of 600 Pa (0.6 kPa, or 6 millibars, or 0.087 psi), compared to Earth's 101.3 kPa water most definitely will go to gas. I believe that a blowout or massive geyser of water happens and when it bursts and start to go down hill it turns to vapor, but not before enough of the water has laid down enough minerals and traveled far enough to make a landscape change. And it doesn't take into account if the water is "dirty" (meaning has salt or whatever minerals and junk that has dissolved in the water to hinder for awhile the vapor process. But one funny thing is that the deeper you go into the surface of the planet the higher the pressure is. As an example the Hellas Planitia, the massive crater has a pressure of 1.155 kPa which is double the surface level pressure and just 1 percent of earth pressure.
I saw this movie on IFC this past Friday called Stranded: Náufragos, directed by a spanish director and story written by spanish sf author. It stars Vincent Gallo and others and it tells a story of this crew trying to survive on Mars after crashing. I'll post a link, but what hit me the most is that the ancient alien structures and what remained of the alien society built their cliff dwellings in the massive trench on mars and other low areas. When you see the last minutes of the movie when the camera is pulling away from them in the canyon and up the walls of the canyon into orbit gave me pause and to think if you had to survive would you dig your civilization into the caves and deep recesses of the planet in order to maintain air pressure of some sort and maintain atmosphere.
en.wikipedia.org...:_N%C3%A1ufragos
en.wikipedia.org...
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