Everyone wants NASA to send its Mars rover back for another look at this 'giant space crab alien'

Spotting aliens and bits of spacecraft on Mars has been a full-time occupation for believers in the nearly 40 years since humans first started getting decent snaps of the Red Planet.

It was this “face on Mars” picture from Viking 1 which first ignited the hobby:

Picture: NASA/Viking 1

It was also this snap which raised greater awareness of the pyschological phenomenon “pareidolia” – essentially, the mind being stimulated to see things that don’t exist.

Creationists in particular love using pareidolia as an explanation of why paleontologists see “fossils” where they see “unusually shaped rocks”. And when it comes to confusing rocks with evidence of alien life, it doesn’t get much better than scrutinising the images NASA posts daily from its Mars rovers Opportunity and Curiosity.

In fact, we’ve got a whole collection of them here, from a dinosaur spine to an ape-lady working on her tan.

The latest instalment, however, is undeniably intriguing – even as a rock formation:

Picture: NASA/JPL

(Here’s the full-size pic from NASA.)

Take a closer look.

Picture: NASA/JPL

Here’s the ultra-zoom, which has been clarified a little by several alien-spotting web sites.

It’s got them all in a tizz, and many are calling for NASA to send a rover back there to clarify what it photographed. If it’s still there…

Seth Shostak, senior astronomer and director of the Center for SETI Research, is not among the believers. He told the Huffington Post he gets images like this one “about once a week”.

Sometimes, pareidolia means seeing isn’t believing.

But not always.

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