<P> The question of microbial life on Mars remains unresolved . Nonetheless, on April 12, 2012, an international team of scientists reported studies, based on mathematical speculation through complexity analysis of the Labeled Release experiments of the 1976 Viking Mission, that may suggest the detection of "extant microbial life on Mars ." </P> <P> The leader of the imaging team was Thomas Mutch, a geologist at Brown University in Providence, Rhode Island . The camera uses a movable mirror to illumate 12 photo diodes . Each of the 12 silicon diodes are designed to be sensitive to different frequences of light . Several diodes are placed to focus accurately at distances between six and 43 feet away from the lander . </P> <P> The cameras scanned at a rate of five vertical scan lines per second, each composed of 512 pixels . The 300 degree panorama images were composed of 9150 lines . The cameras scan was slow enough that in a crew shot several members show up several times in the shot as they moved themselves as the camera scanned . </P> <P> The Viking landers used a Guidance, Control and Sequencing Computer (GCSC) consisting of two Honeywell HDC 402 24 - bit computers with 18K of plated - wire memory, while the Viking orbiters used a Command Computer Subsystem (CCS) using two custom - designed 18 - bit serial processors . </P>

On what planet did viking 1 & 2 land what robotic feature did they have