Mystery of Red Planet Picture

It's the picture that ET believers have been waiting for - and the one that shows there could be life on Mars.

The image, taken by Nasa's Mars Explorer Spirit, seems to show a figure on the surface of the red planet.

However the more sceptical have decided that it is just a rock.

At first astronomers were disappointed with pictures sent back from the surface of the Red Planet by the six-wheel robot four years ago.

But a space fan spotted the figure, which was just a pinprick in the original photograph. It was blown up and posted on a website.

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