Three interlinked Level One Menger Sponges, by Margaret Wertheim.

Our experiments in business card origami continue. This week Tracy Tynan brought in some enigmatic stacks of Columbus Cubes – off-kilter cubes that lock together via a carefully folded kink in one corner. IFF director Margaret Wertheim completed a stack of three interlinking Level One Menger Sponges.

Columbus Cube Towers, by Tracy Tynan.