Outside In

• Cast: Karen McNenny, Paul de Cordova
• Duration: 22 minutes
• Genre: Animation, Documentary
• Rating: 8/10
• Release Date: 1994-05-15

The computer animation Outside In explains the amazing discovery, made by Steve Smale in 1957, that a sphere can be turned inside out by means of smooth motions and self-intersections. Through a combination of dialogue and exposition accessible to anyone who has some interest in mathematics, Outside In builds up to the grand finale: Bill Thurston's "corrugations" method of turning the sphere inside out.