Richard speaks with a professor of astrobiology about the panspermia hypothesis, the theory that all life on Earth originates in outer space.

Guest: Chandra Wickramasinghe, PhD is the director of the Centre for Astrobiology at the Universty of Buckingham.  A professor of applied mathematics and astronomy. He is the editor in chief of the Journal of Astrobiology and Outreach and co-author of Cosmic Womb: The Seeding of Planet Earth and his latest, Our Cosmic Ancestry in the Stars. He lives in Cardiff, Wales.

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