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Alexander Horned Sphere 3D Model
https://en.wikipedia.org/wiki/Alexander_horned_sphere The Alexander horned sphere is obtained by the following construction, starting with a standard torus:
1- Remove a radial slice of the torus. 2- Connect a standard punctured torus to each side of the cut, interlinked with the torus on the other side. 3- Repeat steps 1–2 on the two tori just added ad infinitum.