We have all heard of little green men from Mars.
But now an American 'armchair astronaut' claims to have discovered a mysterious structure on the surface of the red planet - by looking on Google earth.
David Martines, whose YouTube video of the 'station' has racked up over 200,000 hits so far, claims to have randomly uncovered the picture while scanning the surface of the planet one day.
© GoogleUncovered: David Martines believes he has found a structure on the surface of Mars - by looking at Google Mars
The white dot in the centre of the screen has set the blogosphere alight with rumours of a secret base
Describing the 'structure' as a living quarters with red and blue stripes on it, to the untrained eye it looks nothing more than a white splodge on an otherwise unblemished red landscape.
He even lists the co-ordinates 49'19.73"N 29 33'06.53"W so others can go see the anomaly for themselves.
In a pre recorded 'fly by' video of the object, Mr Martines describes what he thinks the station might be.
He said: 'This is a video of something I discovered on Google Mars quite by accident.
'I call it Bio-station Alpha, because I'm just assuming that something lives in it or has lived in it.
© GoogleNASA and Google have both yet to respond to the 'finding', circled here
'It's very unusual in that it's quite large, it's over 700 feet long and 150 feet wide, it looks like it's a cylinder or made up of cylinders.
'It could be a power station or it could be a biological containment or it could be a glorified garage - hope it's not a weapon.
'Whoever put it up there had a purpose I'm sure. I couldn't imagine what the purpose was. I couldn't imagine why anybody would want to live on Mars.
'It could be a way station for weary space travellers. It could also belong to NASA, I don't know that they would admit that.
'I don't know if they could pull off such a project without all the people seeing all the material going up there. I sort of doubt NASA has anything to do with this.
'I don't know if NASA even knows about this.'
The 'discovery' is similar to that of the infamous 'face on Mars'
Uncovered by the Viking 1 probe in 1976, a quirk of geography threw shadows over a small hill on the Cydonia region of Mars, making the inanimate rock look like a carved face.
The picture was heralded as proof of an alien civilisation by some but was dismissed as a mere trick of the light by scientists at NASA.
Mail Online has tried to contact both NASA and Goggle for a response to the image, but neither has replied.
The rather obvious metallic shine is a bit more convincing than whatsisname's face. But you have to take into account the filters they were using. Most of the pictures of the stars and galaxies we see are doctored to create an imitation of what they would look like in real light. And you never know if they got it right. I for one would like to know what frequencies of light they were capturing in those photos. Something that is shiny in a metallic way might look a bit different in the ultra violet range or in the infra red range. Or perhaps I should say maybe it wouldn't look metallic in the light our eyes are used to.