A Mobius Strip is a unique topological object with fascinating properties. It was discovered independently in 1858 by two German Mathematicians, August Ferdinand Möbius and Johann Benedict Listing. Mobius strips are actively studied in several fields of science and have been used in many applications from continuous-loop recording tapes and typewriter ribbons to computer print cartridges, electronic resistors, and conveyor belts. The Mobius strip has also been used in art including many science fiction stories. This is the first part of a two-part post about mobius strips. In the video below, I demonstrate their most known property which is part of the punchline of a version of a classic joke.