Scientists Uncover a 40-Year-Old Mystery with a Self-Righting Tetrahedron and a Unique Pyramid
Scientists have built a unique four-faced pyramid called Bille that always lands on the same face, confirming a 40-year-old mathematical theory and demonstrating potential applications in spaceflight and medicine. The object, a monostable tetrahedron, was carefully engineered with precise materials and design, representing a significant breakthrough in geometry and engineering.