The folding pattern, known as the Miura-ori, is a periodic way to tile the plane using the simplest mountain-valley fold in origami. It was used as a decorative item in clothing at least as long ago ...

As if by magic, three squares of paper become a heart, a bird and a box. Origami instructor Janet Deen breaks the magic down into steps to fold the paper into three-dimensional objects. “It’s that ...