Here is evidence that a civilization existed on Mars that was destroyed by a nuclear war... Yes, this is a controversial theory proposed by Dr. John Brandenburg, a physicist who worked on defense and plasma programs, claiming that an ancient Martian civilization was destroyed by a massive nuclear attack.

I'm going to go with geology. Not because I don't think there is a possibility of life and even civilization on Mars in some distant past when it had water and an atmosphere. I say so because any structures would be so ancient they most likely would be indistinguishable and or under deep layers of strata. The formations we see in the video are also found on earth through freezing and thawing cycles. So the find itself suggests some type of water still present or an atmosphere long ago that had seasons like earth.

THIS IS WHAT CITIES LOOK LIKE AFTER 2 BILLION YEARS

But we have had cameras up there for years ???

Our next step is to send a rover to that area.