RT @asahidari: Simple paper folding of the Art tower Mito (in Ibaraki, Japan, designed by Arata Isozaki). Boerdijk–Coxeter helix, a linear stacking of regular tetrahedra. source:https://t.co/xtTX4Q9y8a https://t.co/pX7prTLe6w #origami #3dmodeling https://t.co/XgOU6JaZH2