A 3D shape of constant width viewed from three different angles, with the middle view resembling a 2D Reuleaux triangle.
Andriy Prymak et al. 2024/SageMath/Danilo Radchenko
Mathematicians have reinvented the wheel by discovering a shape that can roll smoothly when sandwiched between two surfaces in four, five or more dimensions, answering a question that has puzzled researchers for decades.
Such objects are known as shapes of constant width, and the most familiar such shapes in two and three dimensions are circles and spheres, although they are not the only such shapes. …
Source: www.newscientist.com
