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“Exploration is in our nature.” - Carl Sagan

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.

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Liquid water under the Martian polar ice? Maybe not

New research indicates that what appeared to be liquid water hiding under Mars’ polar ice may actually be a form of clay.

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