Did NASA's robot explorers finally locate life on the Red Planet? In this exciting program from "Nova," viewers will rediscover the saga of Spirit and Opportunity, the two probes that roved the surface of Mars for over four years. In addition, the discoveries of the third probe, Phoenix, are shared─including the information gleaned from its obtaining an ice sample, where traces of life might be more readily found. 56 min. Widescreen (Enhanced); Soundtracks: English Dolby Digital stereo, DVS.