Aperiodic tilings! Just a couple of years ago someone discovered a single tile (down from the set of ~20000 that was first used to prove that aperiodic tiling was even possible) that can completely cover an infinite plane without ever falling into a repeating pattern.
Aperiodic tilings! Just a couple of years ago someone discovered a single tile (down from the set of ~20000 that was first used to prove that aperiodic tiling was even possible) that can completely cover an infinite plane without ever falling into a repeating pattern.
Neat!