It is highly likely that we have found life on Mars already and will find it in other places in our solar system as well — on moons as well as planets.
Here’s the reasoning: EVERY single lander that had landed on Mars carried at least one experiment that was looking for indications of life either directly or indirectly. Some were extremely sensitive and complex experiments that were as good as a similar analysis on Earth.
And EVERY Mars lander, within the bounds of the capabilities of its experiments, FOUND LIFE!
But after the indications of life were published, NASA scientists always re-examined the experiments and decided that there were other natural processes that could possibly have given the same result. So they were disregarded.
It does bring to mind the aspect that the same NASA scientists failed to make this determination BEFORE experiments were sent to Mars. Strange isn’t it?
But if you add up ALL of the experiments as though they were one major and thousands of times more complex and complete experiment, there is NO known natural process or series of natural processes that could have produced the total result.
If you look at them in their totality, the only logical conclusion is that yes, we have found life on Mars already. And there is no known or speculative process or series of processes that could have caused the same results in toto.
Here is the latest and my favorite. While it could have been caused by fairies with paint brushes, that strikes me as far, far less likely than that tangible and visible evidence of life has been found.

This photograph is is of types of spots in rocks that are only known on Earth to have been caused by microbes. There is no known natural process or series of processes that can be cited as a possible cause.
Then add that to the totality of the evidence thus far and it is a near certainty that life on Mars was first found by Viking 1 and 2 in 1976 — FIFTY YEARS AGO!
