Some of my favourites as photographed by Yu Tsai in his collection called 16 Expressions. These flawless people are Leonardo DiCaprio, Zoe Saldana, Daniel Radcliffe, Idris Elba, Chris Pine, Janet Jackson, Mila Kunis, and Chris Hemsworth.
A hyperbolic tessellation in Poincaré’s disk model, using only regular heptagons (light blue). Connecting the midpoints of adjacent heptagons gives a tessellation with hyperbolic equilateral triangles (dark blue), in groups of seven around common vertices.
This kind of hyperbolic patterns, published by mathematician Harold Coxeter, inspired Maurits Escher to his famous Circle Limit woodcuts.