The Sandsara is a tabletop kinetic sculpture that creates infinite art patterns in the sand. To the naked eye, it’s simply a hypnotic, eye-catching piece — the sculpture’s tiny ball moves across the ...

Most patterns eventually repeat themselves. But in the 1970s, mathematician Roger Penrose discovered a set of shapes that could cover an infinite plane without ever repeating. Known as Penrose tilings ...

(via Veritasium) Simple rules of geometry meant that 5-fold symmetry was impossible as were crystals without a periodic structure. This turns out to be wrong.

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!976905~!0#focus ...