In the autumn of 1939, a British graduate student named Arthur Stone was trimming American-sized paper to fit his European binder. Bored with the leftover strips, he began folding them into triangles. What he discovered wasn't just a toy, but a gateway into a world where paper behaves like a higher-dimensional object. This discovery eventually became the centerpiece of Martin Gardner’s first book , Hexaflexagons, Probability Paradoxes, and the Tower of Hanoi . The Hexaflexagon: More Than Meets the Eye
At first glance, a looks like a flat, six-sided polygon with only two faces. However, through a series of "pinches" and folds, you can "flex" it to reveal entirely new surfaces. Hexaflexagons, Probability Paradoxes, and the T...
: The simplest version, which has three distinct faces. In the autumn of 1939, a British graduate