Some sample questions from this category:
* The Möbius strip has the property of being non-orientable, meaning that it can be moved around the surface and back to where it started so that it looks like a mirror image of itself. Which of these figures is also non-orientable?
* A famous artist was fascinated with the Möbius strip as well as other impossibilities. He put them in many pieces of his art. Who was he?
* Which of these is not another name for the Devil's pitchfork?
* Which impossible shape was created by artist Oscar Reutersvärd?
* The impossible cube (shown at the lower left-hand corner of M.C. Escher's "Belvedere) is based off of a wire-frame 2D cube first published in 1832. Which of these is the correct name for it?
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