In September 2019, news broke regarding progress on this 82-year-old question, thanks to prolific mathematician Terence Tao. And while the story of Tao's breakthrough is promising, the problem isn't ...

If you suspend a Rubik’s Cube near the corner of a room and shine lights at its exposed faces, it will cast square shadows on two walls and the floor. A real-world Rubik’s Cube has a gadget at its ...

An engineer noted for his ability to visualize three-dimensional structure was having coffee and doughnuts. Before he dropped a sugar cube into his cup, he placed the cube on the table and thought, ...