About the possibility to find life on Mars
1) Scientists have found strong evidence about life on Mars (1)
The chemical combination called "thiophenes" (2)has been found from Mars and that is thought as the evidence of the life on that planet. That chemical compound is found from truffles and some bacteria, and that evidence has been called the prove about life on Mars, but there are some things, what are remarkable when we are talking about that kind of chemicals.
Thiophenes can also be forming in the volcanic action and the impact of the meteorite can also form that kind of thing. There is a possibility that the meteorite that is involving the remainings of bacteria would travel from Earth to Mar, and that thing would cause that the dead bacteria, what comes from Earth or somewhere else have been caused that this chemical has been formed on that planet.
2) The question is, could that bacteria or some other primitive life form be active, or is that chemical only the memory of things, what has been happening somewhere in the past?
When we are looking at the history of Red Planet, that thing has been lost its lithosphere at least twice to space because of a cosmic impact. The extreme heat of impact would destroy every organism, but there is a possibility, that some bacteria could live a while after impacts because they are been in the paces, where the heat and shockwave were not affected, but the loss of atmosphere along with the weakening magnetic field caused that the UV-radiation killed those organisms soon after the impact. And that means that there could be found only fossils of primitive life forms.
So those impacts might cause the bacteria, what was forming on that planet would be destroyed. And things, what we are seeing are remainings of life, what was formed on the surface of the planet, what had precise conditions of the forming the bacteria.
3) Only the genome samples, that are taken from Mars can make sure are the primitive bacteria of Mars and Earth identical.
And the problem is that the genome of those bacteria, what might found on Red Planet might be terminated, because of the heat of the impact of the asteroid. The genome sample proves that genomes are similar, but that's it. It doesn't prove where the cell is coming from.
But the location of that planet was wrong because it was orbiting the Sun at the asteroid belt, and then the impacts caused that the lots of the mass of that planet just flew to space. The thing, that researchers are using for argumentation of that theory is that the Sun was a little bit heavier in the time when life started to advance.
And the location of the planet Mars would be more suitable for forming life than Earth, and there is the possibility that the first bacteria were forming on that planet. Then some of them would travel to Earth inside the meteorites, which was formed when the asteroid broke the lithosphere of Mars.
3.1 ) The lifeforms could travel also from Earth to Mars because some meteorites would throw them to space (3).
But if we cannot isolate DNA or RNA-genome from the fossil, what has been found on Mars, proving that theory is extremely difficult. The impact power of the asteroid caused the extremely high temperature, which might destroy the genetic material of the bacteria immediately.
If we are thinking about the bacterial fossils, what is found in the meteorites what are dig out from the ice of Antarctica (4), we are not sure are they ordinary bacteria from Earth or are those fossils from some other planet, because some organisms are searching the heat. That means that the fossils of bacteria can travel to the meteorite because they are looking for heat.
But there is, of course, possible that some meteorite, what has hit to Earth would throw the material from Earth to the trajectory, what would go to Mars. And it's a possibility, that there has been underground life on that planet.
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