NOVA: Mars - Dead or Alive

"This examination of the ongoing debate over the possibility of life on Mars -- produced for the award-winning PBS science series NOVA -- gets an enriched presentation on this DVD edition. NOVA: Mars -- Dead or Alive has been given a letterboxed transfer to disc in the widescreen aspect ratio of 1.78:1. The audio has been mastered in Dolby Digital Stereo; the narration is in English, with no multiple language options. Bonus materials include an additional interview with NASA researcher Donna Shirley, an optional audio description track for the visually impaired, links to the websites for the Nova series and originating station WGBH, and more."