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With a 1/3 G gravity things do not fall slower, they accelerate slower. Water (or any other thing) falling from 10 metres high would reach the ground at 8 m/s on Mars when on Earth it reaches the ground at 14 m/s.
Originally posted by blue bird
- bigger and slower waves on Mars - if gravity ( so they tell us) is about 1/3 G you can than imageine water to fall 1/3 slowley..
Yes, but those things on the photo of the crater are too large to be ripples, they are at least 4.5 metres wide, and waves of that size should travel longer than what we see, especially with less gravity.
** * regarding ripples in the middle of the crater - well I also said before - water surface can have uneven ripples ( algorithm) due to uneven distribution of wind ( as dynamic parameter) strength over surface ( speed /direction) so we can have different surface roughness. And there can also be a different surface temperature. Surface asymmetries can very well occur.
It does not look like a water line to me because in some places it looks like it has a different colour over it that would spread over the water line, like near that hole on the crater rim, that dark color passes over what would be the water line. It's a bit difficult to explain, but in the case of the "water line" I think that there is something that makes it not look like a water line but I can't really say what it is.
ArMaP - you didn't comment of one obvious fact that we cane see on the crater image - WATER LINE well defined, different in color!
Originally posted by ArMaP
Originally posted by blue bird
- bigger and slower waves on Mars - if gravity ( so they tell us) is about 1/3 G you can than imageine water to fall 1/3 slowley..
With a 1/3 G gravity things do not fall slower, they accelerate slower. Water (or any other thing) falling from 10 metres high would reach the ground at 8 m/s on Mars when on Earth it reaches the ground at 14 m/s.
More than 40 large (greater than 50-m wavelength) sand waves were mapped, with crest-to-crest lengths of as much as 220 m (722 ft) and heights of as much as 10 m (33 ft). The scale of these massive features is unusual because of the modest tidal range in the region (max 2.65 m [8.7 ft] between low and high tide), as opposed to other sites where large sand waves are present (for example, the typical tidal range in the Bay of Fundy is 17 m [56 ft]). But these features persist because tides force an enormous flow through the relatively narrow Golden Gate strait—a total volume of 2 billion m3 (528 billion gallons) every 6 hours—resulting in tidal currents that typically exceed 2.5 m/s (5.6 mph). These strong flows effectively sweep all mobile sediment through the narrowest part of the channel. However, the large sediment-transport capacity of these flows diminishes as they emerge from the Golden Gate, spread out, and slow down, dropping much of their sediment to form one of the largest sand-wave fields in the world.
Water poured out of the mouth of Uzboi Vallis (center) into Holden Crater through its southern rim. The water laid down layers of sediments inside Holden. One possible landing site for the Mars Science Laboratory rover is the flat, smooth area at right center, just beyond where the channel cuts through the rim. This rendering (vertical exaggeration about 2x) looks toward the southwest. It was created using data from various spacecraft. Credit: NASA/JPL/Arizona State University, R. Luk
Holden crater's wide floor, shown in a newly released image, has abundant layered sediments, channels, and large piles of debris at canyon mouths. These suggest a long history of deposits by water. NASA/JPL/Arizona State University
OK, I understand what you say, but we should not forget that those fractal similarities may happen in all natural things, those "trees", based only on its shape, could be the result of the spreading of some liquid on those areas or they could even be animals like coral.
Originally posted by bigfatfurrytexan
The short of it is that life will grow along certain lines. Fractal geometry controls the growth and creation of all massive dissipative/replicative structures and biological machines. The differences we should expect to see when looking at life on other planets would be surrounding environmental adaptations such as size, scale, and possibly overall design (to allow for things like thinner atmosphere or more radiation).
This is exactly what i see when i look at this thread. fractal similarites that make mars almost resemble arizona.
Originally posted by ArMaP
As I said before, sorry, I sometimes over-react and feel attacked with minor things.
I will try to improve my behaviour.
Originally posted by ArMaP
OK, I understand what you say, but we should not forget that those fractal similarities may happen in all natural things,
those "trees", based only on its shape, could be the result of the spreading of some liquid on those areas or they could even be animals like coral.
But one thing is certain, Mars is a very interesting place, with or without forests.
"I stand before you and tell you, quite honestly, I'm shocked by these results," said Michael Mumma, an astrobiologist at NASA's Goddard Space Flight Center in Greenbelt, Md.
Mumma and colleagues discovered unusually high levels of methane at two places in Mars' atmosphere: above the Hellas Basin, a giant impact scar in Mars' southern hemisphere, and Valles Marineris, the great canyon system near the Martian equator.
Methane is a gas that, on Earth, is produced naturally by plants and animals, such as in wetlands and in the stomachs of cows. On Mars, methane is much rarer. It isn't produced in the atmosphere and likely would be destroyed there by chemical reactions within a few hundred years.
So finding methane in the atmosphere suggests that something on Mars' surface is producing it, Mumma said. The question is whether that something is alive.
seattletimes.nwsource.com...
But "alive" could be geologically alive and not necessarily biologically alive, Mumma said.
"Or Mars could be biologically alive," he added. "Or maybe both. So to me that’s the real issue. Now we think that Mars is not a dead planet. Even if it’s just geology that is occurring and releasing this methane…that’s pretty darn interesting. And the geologists are very excited about this prospect."
www.space.com...
At the same meeting, NASA's Planetary Protection Officer, John Rummel, described the alternative explanations: "methane in the atmosphere...is a detection from the planetary Fourier spectrometer. ESA, the European Space Agency, has put out an announcement that it's been detected at 10 to 20 parts per billion. Well, methane in the atmosphere on Mars can mean one of three things: either vulcanism, possibly microbial life, or maybe cows. We haven't seen the cows yet. I doubt that we'll find them. But one of the other two would be a very interesting thing to find out."
www.astrobio.net...
Well, when I see something that looks like water to me I will say so.
Originally posted by Cydonian Priest
ArMap! Nothing looks like water to you, does it
I don't fell that need, it was just a figure of speech (I suppose that is the right name).
Originally posted by StellarX
Few sane people will forget that and i must admit my fascination with the fact that otherwise educated people feel that they must remind the rest of us of other more mundane explanations.
We do not need to consider anything, but we can do it, and if we can do it why shouldn't we do it?
Do you feel we need to consider such odd coincidences instead of just looking and seeing the trees for what they are?
I don't know, I don't think that anyone must spend time whith that, only if they want to.
Why must i spend my time trying to arrive at conclusions that must defend the main stream explanations?
It could be the most likely explanation to you, but it's not the most likely explanation to me. One of the reasons is that I do not remember seeing trees without any other type of life near them. Another thing is that I do not see anything that looks like the shadows of the trees.
Why should these corals look like trees (and cast shadows like trees and change from season to season) or why should the pools be shaped like trees? Why must we go out so far onto the limbs ( excuse the pun) to find possible alternaties to the most likely explanation?
That you should ask to someone from the science establishment.
Where is it that occams razor stops applying when the science establishment feels inclined to defend it's theories so dogmatically?
I deny the idea of those being trees because, to me, they do not look like trees.
So as before i must ask why such a high ranking NASA 'officer' ( i keep telling people that) is now making cow jokes; i think we are already way beyond denying trees but i know you will just go on doing it anyways....