There seems to be increasing evidence of an ancient Martian civilisation, whose ruins are visible on images snapped by earthlings, claim UFO seekers. They base their theories on photographs taken by NASA's Curiosity Rover, convinced that intelligent life might once have existed on the Red Planet.

Martine Grainey, an avid seeker, was the first to examine and post images of a Martian "wall" on her Facebook page. 

An alien conspiracy theorist wrote in a blog post titled 'Alien City Ruins on Mars? In Official NASA Images': "In fact, nearly every single image beamed back by NASA's rovers on Mars seems to show at least one particular 'object' which appears to be artificially carved or created. While most of these objects are the result of pareidolia, other findings cannot be dismissed so easily."

Pareidolia takes place "when the brain tricks the eyes into seeing familiar objects such as faces or animals in textures, patterns or clouds." But again, could such a long parade of images for so many theorists be due to pareidolia?

"What if tens of millions of years ago, when Mars was a planet like Earth is today, an alien civilization flourished there, developed and created massive monuments, structures, temples and cities, just like we have done throughout Earth's long history?" asks a conspiracy theorist website.

The claims were validated by UFO hunter Scott C Waring, of the UFO Daily Sightings Website. He explains that you can find buildings with windows there.

Being an avid believer that a thriving civilisation once existed there, but has been camouflaged by NASA, he wrote: "NASA had to release the photo to the public to say 'we didn't hide it, we released it to the public. This way they won't get caught for hiding evidence later. But we know that trick, and we are onto them."

YouTube/ArtAlienTV - MARS ZOO