
Researchers created microscopic cubes, pyramids, half soccer-ball-shaped bowls
and long triangular Toblerone-like structures, all of which fold themselves when
wetted by a drop of water. Credit: A. Legrain, et. al, University of Twente
Remember those elementary geometry lessons that involved cutting out a pattern from a worksheet and folding along the dotted lines to create a cube, cone or cylinder? Well, fully grown scientists...