The ALMOST Platonic Solids
28:47
there are 48 regular polyhedra
42:34
The Amazing Math behind Colors!
22:16
Every Strictly-Convex Deltahedron
30:01
The ALMOST Perfect Numbers
13:27
Johnson Solids
15:18
The Five Compound Platonic Solids
34:54
I Saved an Electron Microscope from the Trash
25:05