If a Spacecraft Lands on an Empty Planet, Does it Make a Sound?

NASA's Perseverance rover successfully touched down on Mars last week, capping a perfect set of three arrivals at the red planet. Dr. David Brain joins us to tell us about the plans for one of those missions, and how it will help us unravel Mars' complicated climate history. Plus, we have a series of Mars trivia questions and a look at what the future holds for Mars exploration.