Everything they don't want you to know about Mars and who lives there
Logically, such craters as Kaiser are deep depression voids in the terrain and, if there is ground water table in the surrounding terrain that isn't too deep down, it could be expected to migrate through the ground toward, down slope, and into the deeper terrain void represented by a crater. Of course, translucent surface water allowing solar light penetration and retarding back reflection to a degree could be expected to absorb some of that light and represent a darker color tone. Likewise, if there is sustained water presence in the bottom of the crater over time, larger complex life forms might be expected to gravitate to and flourish in these favorable conditions. Most life that we are familiar with, especially the kind that achieves vertical height that also creates shadows, could be expected to absorb some solar light radiation (energy) either by design and function and/or via the shadow effect.
Is there life on Mars? - BBC News
If so, there might be regions near the surface where the conditions for life exist, which are protected from radiation. Suddenly the prospects for life gets a lot better. And even though the water on Mars appears to be very salty, we do know of extremophiles that are able to live in .
What you are going to see here in Kaiser Crater really represents some large environmental ecology's and there is no telling what kind of more normal size unseen biological life or even intelligent life has made this ecology their home. Satellite imaging as released to us is too resolution compromised to reveal objects on a scale this size but you can bet that they are there.
My Life on (Simulated) Mars - Narratively
This evidence looks a lot like conventional trees and the very tight jamb packed crowded density here says old growth. However, all of this evidence is very dark partly due to tampering tinting but also partly due to solar light absorption. I had to lighten this scene up a great deal just to obtain this limited level of detail. Further, although it obviously isn't some kind of strange geology, it is very knobby and rough looking relative to other conventional tree forests I've seen on Mars making me cautious as to identifying this a conventional trees canopy we might be familiar with. In other words, although I'm satisfied that it is definitely living growth and forest life of some kind, I'm not prepared to say exactly what.
Life on Mars: How to Survive the Red Planet (and the …
The tools on this rover will open up even more exciting possibilities relating to life because they’ll be able to see beneath the surface. If there is still life on Mars, that’s where we’ll find it.