Anyone who's ever tried tiling a floor, a backsplash or even an arts-and-crafts project probably knows the emotional ...

Escher and Penrose found inspiration in each other’s work. In 1952, University College London awarded Penrose a bachelor of ...

The Kakeya set—named for its discoverer Sōichi Kakeya—was complicated by a subsequent mathematician named Abram Samoilovitch ...