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Originally posted by sensfan
Has anyone considered that the pics we are getting from mars are viewed by 1000's of scientists and other experts from around the world, not just NASA folks, and if there was any chance that there were in fact signs of life, be it alive, or dead, we would have heard something from the scientific community by now?
Originally posted by Balez
Nicely done internos and ArMap
I think it is a liquid of some kind, something that is similar to an oil substance?
Probably being pressed up to the surface, and then spill over the sand dunes.
I doubt it is water though
The dunes are produced by the action of either the river or the sea. Those that were created by the Rhône have mostly been removed in order to free up land for agriculture. The coastal dune system is exposed to storms, and gradually more so as the level of the sea rises. Dunes that are further from the shore enjoy a certain amount of protection, and they do not change position so much, given that they are stabilised by vegetation, in particular tamarisk bushes and pine trees. Despite their arid appearance, dunes contain reserves of fresh water that allow them to support a rich, colourful flora (fiche thématique).
Sand-binding plants play an important role in the formation, development and maintenance of dunes. If dune plants are destroyed, eventually the dunes themselves can be lost, leading to severe damage to the beach and risk to coastal properties.
Our dunes were originally covered by:
native sand grasses on the seaward face of the foredune larger and more diverse shrubs and trees inland.
Today, no intact examples of this natural plant sequence remain in the Waikato Region. The loss of native coastal trees and shrubs is particularly obvious.
For example, the beaches of the eastern Coromandel Peninsula largely lack native trees and shrubs, though isolated pohutakawa trees and other plants remain. Early regeneration of native trees and shrubs is evident at some sites (such as Whiritoa Beach).
There are two main native sand-binding plants:
pingao (golden sand sedge)
spinifex (silvery sand grass).
These plants are well adapted to the dynamic conditions on the beach and send out runners which bind the sand. Pingao is a golden colour and is an important weaving material. It is also a threatened plant, and has to compete with introduced plants and survive grazing by rabbits.
On modified dunes, native sand-binding grasses have often been lost or replaced. In some areas, the native plants have been replaced by managed grassland. In other places, marram grass has been introduced to stabilise the dunes. Marram grass changes the way dunes build up and their shape, and doesn’t provide suitable nesting habitat for some coastal birds.
Dune habitats provide niches for highly specialized plants and animals, including numerous rare and endangered species. Due to human population expansion dunes face destruction through recreation and land development, as well as alteration to prevent encroachment on inhabited areas. Some countries, notably the U.S., New Zealand, Great Britain, Australia, Canada and the Netherlands have developed extensive programs of dune protection. In the UK, a Biodiversity Action Plan has been developed to assess dunes loss and prevent future dunes destruction.
Originally posted by WitnessFromAfar
I think it's important for us ALL to keep from proclaiming 'what we're seeing is (Fill in the blank)'. Even the skeptics, even NASA.
Especially Dave, in absence of a better theory, which I've not seen you provide. I'm not just talking in this thread either. You have a tendency to call something 'bunk' without offering an alternative explanation, and you add to these posts (regularly) an insult to the poster you're speaking to.
If you've got something to say, an analysis of the evidence that shows some sort of results maybe? I'm all ears. Otherwise, we should all keep in mind that it has yet to be determined what these pictures are actually showing. And the Original Poster's guess is at this point not refuted by the evidence, especially when combined with evidence of ample surface water in both liquid and solid forms on Mars (that's NASA data).