More 'evidence of life' as online users claim to spot an alien picking up a Dr Martens boot in Curiosity's latest images (or is this just another trick of the light played on us by Mars?

When you first see Alien Disclosure UK's 'evidence' of life on the Red Planet, all you can see is a mass of rocks.
But as the camera zooms in and then pulls back, you cannot help but make out the form of a little green man scuttling forward to pick up what appears to be an iconic Dr Martens boot lying on the dusty floor.
The video is the latest in a long line of curious and quirky images from the Red Planet that internet users have jumped to interpret.

However, it is unlikely to be the smoking gun (or boot) that NASA has been looking for to announce the existence of extra-terrestrial existence.
In the early days, the planet was throwing up curiosities. In the 1800s, earthbound observers were certain they could see canals - and even cities - through their telescopes.
But as we became better with our optics, so did our understanding of Mars, and this belief was put to bed as newer images showed no trace of life.
Then, in 1976, Mars was back with a new mystery - the famous Face on Mars, taken by the Viking 1 during a flyby in 1976.
This was later shown to be just another light and perspective trick by Mars, but the haunting visage captured the world's attention.

These include white 'flying objects' zooming across the Martian sky - and then a collection of mysterious 'items' he spotted in a video from Gale Crater.
The image shows what appears to be a rock shaped like a digit with a faint outline at one end that vaguely resembles a fingernail.

Another rock found nearby resembles an overturned sandal, and a crevice on another geological formation looks like a smiling Martian critter.
He announced: 'Mars Curiosity captures a possible ancient finger, a dome shaped object, a shoe or sandal and a possible Martian creature.
'Are these anomalies real, tricks of the light or something else, as always you decide.'