We have met the Martians, and they are us?

In watching a lot of Science Channel lately, there have been many shows dealing with our solar system and the exo-planets. What is an exo-planet you say? It is a planet that is not in our solar system. Twenty or thirty of these exo-planets have been found in other solar systems in our galaxy in search of planets that are Earth like in other solar systems. So far only large gas giants like Jupiter have been found but they say it is only time before a small rocky Earth like planet is found as the scientists get better at finding exo-planets in general. In all of this planet talk, one planet seems to keep being talked about more than any other, Mars. In the last 10 years or so, the interest level of Mars has increased ten fold.

With the 2004 announcement that NASA has been charged to go back to the Moon and on to Mars within the next 40 years, scientists have started looking toward the red planet. The current extended missions of the two Mars rovers, Spirit and Opportunity (they originally had a 90 day mission timetable, 4 years ago) having found evidence of flowing water in the recent history (millions of years ago, not the first thought billions of years ago) of the red planet. Along with the discovery of the meteorite that came from Mars with what appears to be the fossil remains of simple one cell life forms that are found on Earth in it, "the question of did life actually start on Mars and then come to Earth?" is being seriously asked in the halls of the planetary scientists.

Of course we have to first prove that there was life on Mars at some time in its past and when. Then what, if anything, is shared with life on Earth? I have a good idea that this question of being a Martian will not be answered in my lifetime, but I would bet by the end of the 21st Century, we will have a good idea what the answer is.

If it is proven we are descendents of Martian life, how will that fact shake up our mind set of where we fit on Earth and in the Universe?