Geometric Shapes Fold Themselves into Microscopic Building Blocks A tiny, self-folding dodecahedron may do more than impress an origami master. Inspired by self-assembling viruses and proteins, such ...

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...