Multiple Klein bottles Linked Klein bottles. Note that the number of "bottles" needs to be uneven in order to have a non-orientable surface. Added on 2016-02-16
From an octagon to a genus 2 surface An octagon can be bent into a genus two surface (a surface with two holes) by joining the sides with the same colour.. Added on 2016-02-16
From a 16-gon to a genus 4 surface A polygon with 16 sides can be formed into a genus 4 surface, a surface with 4 holes. Added on 2016-02-16
Dodecahedral tesselation of the hypersphere A dissection of the 120 cell in twelve rings of 10 dodecahedra. Two sets of six rings form 2 solid interlocked tori. The film starts by showing the 600 cell, the dual of the 120 cell. Added on 2016-02-21
The Klein Quartic I How this hyperbolic tiling can be folded into a genus 3 surface. Added on 2016-02-16