50 years after Viking 1's historic Mars landing, NASA is looking to the Red Planet's skies - Space

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50 years after Viking 1's historic Mars landing, NASA is looking to the Red Planet's skies Space On This Day, July 20: Viking 1 is first spacecraft to land on Mars Yahoo News Canada Monday briefing: 50 years after Viking landed on Mars, did Nasa overlook evidence of life? The Guardian Viking: 50 Years on Mars — Poster, Wallpapers, and Backgrounds NASA Science (.gov) Photos: 50 Years Since Viking 1 Landed on Mars The Atlantic