The rock was picked up by images from NASA’s rovers on the Red Planet, prompting speculation from alien hunters.
It looks as if the rock is hovering above the ground of Mars, casting a dark shadow over the surface as it does.
Conspiracy theorists quickly picked up on the image, claiming that it is proof that a once highly advanced species either existed or visited Mars in the distant past.
The image was picked up by prominent alien hunter Scott C Waring.
Mr Waring wrote on his website UFO Sightings Daily: “Now here is something you don’t see everyday. I found a hovering rock on the surface of Mars in a NASA photo.
“The thick rectangle shaped rock has a rectangle shape shadow below it. The object is about 10-12 inches from the surface, just hovering in place.
“This could indicate that this is some ancient technology, not a mere rock after all.
“Still filled with power, still hovering on its own, even though the rest of its craft no longer exists.
“Probably remnants of an alien aircraft or spacecraft of long ago.”
However, sceptics and NASA would say the hovering rock and other similar findings are just the effects of pareidolia – a psychological phenomenon when the brain tricks the eyes into seeing familiar objects or shapes in patterns or textures such as a rock surface.
This is not the first time that evidence of aliens on Mars has allegedly been discovered.
Earlier this year, an “alien face” was found in a NASA satellite image of Mars, according to more bonkers claims.
Mr Waring was convinced it could be a rock carving, done by a Martian race, in the same way ancient Britons carved out the chalk figures in hillsides like the giant of Cerene Abbas in Dorset and the Long Man of Wilmington in East Sussex.
However, NASA insisted the rock is just a meteorite impact crater that has been left in the unusual form by later erosion.
When NASA released the image under the “alien head” caption, it said: “The image shows an impact crater in Chryse Planitia, not too far from the Viking 1 lander site, that to seems to resemble a bug-eyed head.
“The two odd depressions at the north end of the crater (the ‘eyes’) may have formed by wind or water erosion.
“This region has been modified by both processes, with water action occurring in the distant past via floods that poured across western Chryse Planitia from Maja Valles, and wind action common occurrence in more recent history.”
Source : EXPRESS