Since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate, or writer who provides a unique perspective on the quest for knowledge about our solar system and beyond. The full show archive is available for free.

Search Planetary Radio

Discovering Mars with Jim Bell and William Sheehan

Discovering Mars is the new chronicle of humanity’s long relationship with the Red Planet, assembled by space historian William Sheehan and Mars explorer Jim Bell.