Does Mars Have a Chewy Center?

We all know Mars is crunchy on the outside, but does it have a chewy center? The NASA Mars InSight mission is en route to the red planet to answer that question. The astroquarks talk about InSight’s science and instruments, Han Solo, Richard Feynman, and what would happen if we made contact with extra-terrestrial intelligence in another wide-ranging episode of Walkabout the Galaxy!

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