Conspiracy theorists believe that Mars was inhabited by an intelligent race - and possibly still is, even today.
Now, they have found ‘proof’ - in the shape of what appears to be a dome-shaped building on the Red Planet.
‘The existence of domes on Mars proves that someone or something built them in the past,’ conspiracy website the Unsilent Majority wrote.
‘Is it possible that we are looking at some sort of building left behind by ancient inhabitants on Mars?
Even Unsilent Majority admits there is a small possibility that the formation is, in fact, a rock - but many UFO sites believe that there was a ‘secret space programme’ which began when humans landed on Mars in 1968.
Conspiracy theorists believe that this is being kept from the ordinary public for various sinister reasons - and that NASA and other governments are covertly in contact with aliens.
Some of these theorists believe that the current Curiosity Rover is a giant hoax - pointing to the vehicle’s shiny solar panels as ‘evidence’ that they are being polished by humans already on Mars.
Unsilent majority writes, ‘What if we are looking at the ultimate evidence that proves the red planet was in fact inhabited in the distant past by beings that developed across the red planet just as humans developed across Earth?’
‘While it could be some sort of natural rock formation, that would need to be extremely strange, we cannot dismiss the fact that we could be looking at the remains of an alien structure on Mars.’