e8: E8

The 240 roots of E8, the largest exceptional Lie group, folded through the golden ratio into two concentric 600-cells and ray-traced as a lace of 1.85 million spheres. Every root is a pearl, every one of the 6720 edges a silver chain. Seen down the Coxeter plane it is the 30-fold Petrie mandala; a symmetry of the group turns it through a 12-fold crystal and back, in an 8-second loop. by compusophy, 23 September 2026.