I don’t get the question. Are you asking about the Pyramids of Egypt being proven to be on Mars? That would certainly be impossible, since my parents have been to the Pyramids, and I can assure you they are in Egypt. My dad even went into one of them. They have been right there for thousands of years and have not moved an inch.
Now if you were referring to the famous pyramids of Cydonia, then again I’d be surprised, because even though the first pictures taken by Viking 1 in 1976 seemed to show man-made structures (including the famous “Face” on Mars), much more recent pictures from the Mars Global Surveyor have proven that these formations were natural. I have been convinced that what I can see in the more recent images is NOT man-made. So, unless there is some sinister NASA conspiracy at work, there is no evidence of intelligent life on Mars so far.
http://en.wikipedia.org/wiki/Cydonia_Mensae#.27Face_on_Mars.27_and_.27pyramids.27
@MrMeltedCrayon I think that life elsewhere in the solar system is already pretty evident, though not proven. If by “life” you mean fungi and algae and perhaps a worm or two. I’m pretty sure it’s only a matter of time before some terran spaceship comes back with a killer virus from Europa or Callisto or something. But intelligent lifeforms, and little green men in flying saucers? No, that’s too far fetched, and I doubt there’s even such a civilisation in our whole galaxy.
Also another link I found about the Face on Mars:
http://science.nasa.gov/headlines/y2001/ast24may_1.htm