"So what would happen if we learned that there is microbial life on Mars, or that it has existed there in the past? Well it would only challenge everything we know. We would have to come to grips with not having a unique status in the universe and will have to work out how to include extraterrestrial "life" in our existential or religious beliefs – to name a few.
On a scientific level, there's a lot at stake. Of course, it would also lead to major new efforts to find life on planets beyond Mars and even beyond our own solar system.
The first challenge if life is ever detected will be to prove that we didn't bring it there from Earth – a difficult task to achieve. Careful cataloguing of the "bioburden" load on the spacecraft and from the cleanrooms it was assembled in can provide a check on what organisms might have been present on the spacecraft when it left the Earth. Fundamentally though, life that arose beyond the Earth would likely result from subtly different chemical processes, so to find out for sure, a detailed in situ biochemical analysis would be required." phys.org
The political farce in the US and the never ending spectacle of the Borg's failures in the ME are boring. Now, here is something interesting. pl