Turning a Sphere Inside Out
1979, English. Directed by Nelson Max.
Unfolding the impossible: turning a sphere inside out, without a single crease.
This video is about the problem of turning a sphere inside out, by passing the surface through itself, without making any holes or creases. Mathematicians believed the problem to be unsolvable until 1958, when Stephen Smale proved otherwise. The motion of turning a sphere inside out, called a regular homotopy, is extremely difficult to visualize. The homotopy in this film was developed by Bernard Morin, a blind mathematician. The motion is illustrated with a sequence of chicken-wire models, built by Charles Pugh, showing the crucial stages in the motion. Commentary is provided by mathematicians Nelson L. Max, Stephen Smale, and Charles Pugh, and by physicist Judith Bregmann.
- Runtime
- 0h 22m
- Post-credits
- None listed
- Language
- English
- Rated
- Check local
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Where to watch Turning a Sphere Inside Out
Turning a Sphere Inside Out isn’t streaming on any OTT platform in India yet; it released on 1 January 1979.
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Details
- Released
- 1 January 1979
- Country
- United States of America
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Turning a Sphere Inside Out: quick answers
Is Turning a Sphere Inside Out worth watching?
Turning a Sphere Inside Out doesn’t have enough ratings for a verdict yet.
How long is Turning a Sphere Inside Out?
Turning a Sphere Inside Out runs 22 minutes (0h 22m).
Does Turning a Sphere Inside Out have a post-credits scene?
None is listed for Turning a Sphere Inside Out. Viewers tag these on TMDB, so a brand-new film may not be tagged yet.
Turning a Sphere Inside Out parents guide: is it suitable for kids?
No age rating is listed for Turning a Sphere Inside Out yet.
Which OTT platform is Turning a Sphere Inside Out on?
Turning a Sphere Inside Out isn’t streaming on any OTT platform in India yet; it released on 1 January 1979. (Checked 13 November 2026.)
What movies are like Turning a Sphere Inside Out?
If you liked Turning a Sphere Inside Out, try Beyond Infinity: Buzz and the Journey to Lightyear, Embrace the Panda: Making Turning Red, The Curious Birth of Benjamin Button.
Who directed Turning a Sphere Inside Out?
Turning a Sphere Inside Out (1979) was directed by Nelson Max and stars Nelson Max, Stephen Smale, Charles Pugh.