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The Planets Revisited Terra Firma: Are We Alone Clips

  1. Mariner reveals Mars

    Duration: 04:13

  2. Voyager 1 finds volcanoes on Io

    Duration: 02:53

  3. Magellan maps Venus

    Duration: 03:06

  4. Europa: Ice world

    Duration: 02:31

  5. Viking lands on Mars

    Duration: 01:42

  6. Venera 9 lands on Venus

    Duration: 01:11