Tracing the Solar System's Origins in Comet Dust

In 2004, NASA's Stardust mission stole microscopic rocks from a comet's tail. Last week, scientists released their first analysis of the alien particles. We discuss what comets can tell us about life and how our solar system formed.

Guest:

Don Brownlee, principal investigator for NASA's Stardust Mission; professor of astronomy at the University of Washington in Seattle, Washington

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