Discovering Mars with Jim Bell and William Sheehan
Planetary Radio: Space Exploration, Astronomy and Science
00:00
Mariner Nine and Its Impact on Mars
i think a particular mariner nine wia, fiftieth anniversary we just celebrated, made such an impact. We discovered that mars wasn't another earth, as perhaps had been thought at one time. Wasn't another moon either. Realized t it had its own particular a geologic history including shield volcanoes and vast canyons. It has these gigantic dust storms that can cover the whole planet from pole to pole.
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