An intriguing photo, taken in 2004 by the Mars explorer Spirit, appears to show a human shaped object, website telegraph.co.uk reported Wednesday.

It looks startingly like previous photographs purporting to have captured Bigfoot.

Snapped at the rock-strewn Gusev Crater, the grainy picture appears to show a Bigfoot-style alien creature strolling casually down a hill.

Its bulbous "head" is cocked to one side, as if in concentration, while its right "arm" appears to be reaching out for balance.

The "creature" was spotted when space enthusiasts analysed photos beamed a hundred million miles to Earth by Spirit and its twin explorer Opportunity.

Spirit, sent to Mars to capture images from the surface of the planet, is one half of a USD 820 M mission, along with Opportunity.

It landed on Mars in January 2004 for a three month mission to search Gusev Crater, believed by scientists to be the bed of an ancient lake. If Mars once had surface water, it had the potential to support life.

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