A computer system designed to look for life on Mars has been tested at a site on Earth resembling a Martian region being explored by one of Nasa's rovers.
The system, to be worn by an astronaut, underwent a trial at red sandstone beds in Spain with similarities to Meridiani Planum, where Opportunity rover landed.
http://news.bbc.co.uk/2/hi/science/nature/4084058.stm