When I think of impossible shapes, I think of the ones where you were supposed to draw a shape without crossing over the same line twice. I was never good at that, but I bet design studio Cuatro Cuatros mastered the art of impossible shapes. The Penrose triangle is considered an "impossible figure," but the team at Cuatro Cuatros designed the Impossible Triangle as a flower vase, with three bars that are at right angles to one another, but are connected to form a triangle. When looked at from certain perspecties, voila, the impossible is no longer. [Ignant]