Discovering Mars with Jim Bell and William Sheehan
Planetary Radio: Space Exploration, Astronomy and Science
00:00
Introduction
This week on planetary radiowelcome im at caplin of the planetary society, with more of the human adventure across our solar system and beyond. William shin and jim bell have written a book that traces this entire history. You'll also get your chance to win their book when bruce sends us out pastne n for this week's what's up space trivia contest.
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