Ethan Bolker and Hiroko Takano
Ethan Bolker has built mathematical models ever since he read
Hugo Steinhaus's "Mathematical Snapshots" more than 60 years
ago. Hiroko Takano is a mathematical technician at the National
Museum
of Mathematics.
Paolo Uccello, Johannes Kepler and M. C. Escher drew the small
stellated dodecahedron. You can fold one from its net of 60
isosceles
triangles - but it's better built by weaving together twelve
nonconvex interlocking pentagrammatical faces. No tape. No glue.
We're still trying assemble the great stellated dodecahdron from
the same
ingredients.