Does this photograph really prove that we are not alone in the universe?
Images beamed back from Mars would suggest so - although to sceptics, it could just be a strange rock formation.
Nasa's Mars Explorer Spirit sent back images from the surface of the Red Planet four years ago, and there was initial disappointment among scientists that they lacked any signs of life.
But space and science fiction enthusiasts are convinced there is more than meets the eye, and after years of studying the images, have found what appears to be an alien figure walking downhill.
The discovery of the life-like figure ambling across the surface of the planet is likely to further boost intrigue in our nearest neighbouring planet.
An earlier rock formation, dubbed "the face of Mars" showed what appeared to be a human head staring into the night sky.
The pictures, found on a Chinese website, are now creating a stir of excitement on the internet.
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