Jan 22, 2010
Sphere Eversion Program Below, the sphere becomes “corrugated”, the first step in the eversion. Next, the north and south poles are pushed through each other. Here one eighth of the sphere has been cut away to reveal some of the interior. Next, the corrugations are twisted 180°, and the sphere starts to deflate. Here some of the surface is cut away. During deflation the interior becomes very complex. This is a zoom-in on the equatorial cross-section (the southern hemisphere has been cut away). Here, seven eighths of the sphere have been cut away, leaving a single “strip”. It is easier to visualize the full eversion if one first studies a single strip as twists and turns inside out.

Sphere Eversion Program

Below, the sphere becomes “corrugated”, the first step in the eversion. Next, the north and south poles are pushed through each other. Here one eighth of the sphere has been cut away to reveal some of the interior. Next, the corrugations are twisted 180°, and the sphere starts to deflate. Here some of the surface is cut away. During deflation the interior becomes very complex. This is a zoom-in on the equatorial cross-section (the southern hemisphere has been cut away). Here, seven eighths of the sphere have been cut away, leaving a single “strip”. It is easier to visualize the full eversion if one first studies a single strip as twists and turns inside out.

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