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Originally posted by Consequence
Plants don't grow out of water.
It doesn't have to be wet. Damp mud/soil/dust can also have the same effect. The track material is way different than the tires on the automobiles on earth.
Originally posted by DeepThoughtCriminal
I think I see what you were talking about, on the second picture. However to me, it does not look wet. Have you ever seen a wet and muddy tire before? Doesn't look like that. This just looks like dirt that has stuck to tire, and been compressed as the tire is rolling. Dirt sticks everywhere and the tire does not need wetness for this to happen.
Originally posted by BassAckwards2999
You've obviously never heard of Hydroponics. Or been near a river or a creek. There are a lot of plants that grow in water.
Originally posted by CynicalDrivel
It is possible that the ridges are there for the same reason footprints stayed on the moon so crisply. The dust particles have sharper edges due to not having a similar atmosphere to Earth's.
Originally posted by Phage
reply to post by wildespace
Electrostatic effects are a good possibility. Probably better than moisture.
Sort of like scuffing your feet on a carpet or in this case a bit like a Van De Graf generator.
An electrostatic precipitator is a widely used dust removal technology for dusty environments on Earth. However, the low pressure of the Martian atmosphere limits the electrostatic potentials normally needed for this technology. This low pressure also affects dust particle charging due to the much longer molecular mean free paths of the Martian atmosphere.
On the Moon and on Mars, conditions are ideal for triboelectric charging. The soil is drier than desert sand on Earth. That makes it an excellent electrical insulator.
The different colors.
Triboelectric charging of nonconducting materials followed by sudden electrostatic discharge (ESD) can damage electronic equipment and become ignition hazard to combustible materials. Mars atmosphere has near zero humidity and therefore natural charge bleeding to surroundings is anticipated to be limited.
Really look at it man, it's no skin off your back or anything.
Originally posted by Asktheanimals
In tracking nomenclature what you are seeing is called dulling. It is the result of the fine particulates being churned up in such a way that the surface is not compacted like what you see next to it and consequently there is no reflective quality (or alternately it absorbs most of the light).
Think of it this way; in a tightly packed surface the particles are close together and in this case they appear shiny, if they are packed loosely together then there are many cracks in the surface that trap the light.
Go step in sand or freshly churned earth and you can see the phenomenon for yourself.