The nine rectangles A, B, C, D, E, F, G, H and I overlap one another. Rectangle A intersects rectangles D and F; this ...

But now, two mathematician friends have used their quarantine time to crack a variation of the age-old geometry problem. They analyzed a set of loopy shapes called smooth, continuous curves to prove ...

Some countries are long and thin, others compact and nearly symmetrical. Some follow natural curves, while others have borders drawn with a ruler. But these shapes are not random — they reflect ...