Of course there was intelligent life on Mars, statues, pyramids, sculptures, heads… all petrified are spotted anywhere on the planet. And of course that civilization lived on Mars hundreds of thousands of years ago or more. After a research of over 2 years, I understood that on Mars there is much more than NASA is telling us.
Check my site and see photos on http://adamthemartian.mex.tl , I have published comic books about the adventures of an architect that lives of Mars and has millions of workers who build just the monuments and buildings seen on the Martian surface.
Daily comic on https://www.theduckwebcomics.com/Adam_the_Martian/