The Planets RevisitedTerra 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