In his final years, Richard Feynman's curiosity took him to some surprising places. We hear from his companions on the trips he took — and one he wasn’t able to. (Part three of a three-part series.)

SOURCES:
- Alan Alda, actor and screenwriter.
- Barbara Berg, friend of Richard Feynman.
- Helen Czerski, physicist and oceanographer at University College London.
- Michelle Feynman, photographer and daughter of Richard Feynman.
- Cheryl Haley, friend of Richard Feynman.
- Debby Harlow, friend of Richard Feynman.
- Ralph Leighton, biographer and film producer.
- Charles Mann, science journalist and author.
- John Preskill, professor of theoretical physics at the California Institute of Technology.
- Lisa Randall, professor of theoretical particle physics and cosmology at Harvard University.
- Christopher Sykes, documentary filmmaker.
- Stephen Wolfram, founder and C.E.O. of Wolfram Research; creator of Mathematica, Wolfram|Alpha, and the Wolfram Language.

RESOURCES:
- I Love My Wife..., directed by Ian Tierney (2020).
- Quantum Man: Richard Feynman's Life in Science, by Lawrence M. Krauss (2011).
- Perfectly Reasonable Deviations From the Beaten Track: Selected Letters of Richard P. Feynman, edited by Michelle Feynman (2005).
- The Pleasure of Finding Things Out, by Richard Feynman (1999).
- The Demon-Haunted World: Science as a Candle in the Dark, by Carl Sagan and Ann Druyan (1995).
- Genius: The Life and Science of Richard Feynman, by James Gleick (1992).
- The Quest for Tannu Tuva, by Christopher Sykes (1988)
- “What Do You Care What Other People Think?” by Richard Feynman and Ralph Leighton (1988).
- The Second Creation: Makers of the Revolution in Twentieth-century Physics, by Robert Crease and Charles Mann (1986).
- Surely You're Joking, Mr. Feynman!, by Richard Feynman and Ralph Leighton (1985).
- Fun to Imagine, BBC docuseries (1983).

EXTRAS:
- “The Curious, Brilliant, Vanishing Mr. Feynman,” series by Freakonomics Radio (2024).

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Ep. 262 - Category Theory, Google Responds, and Another Covid Retro