An Escherian ruse. Ulrich Schwanitz says, “Pfft.” Now, normally, when people say they’ve designed a 3-D Penrose triangle, all they’re really saying is that it looks, from some perspectives ...

The Penrose Triangle is as elegant as it is impossible—much like M.C. Escher’s drawings, it presents a two-dimensional illusion that the eye interprets as three-dimensional. The task of ...

One of these figures is the Penrose Triangle, also known as the Tribar. This object, considered an “impossible figure”, is formed by three bars that appear to connect at right angles, forming a ...