<a href="https://en.wikipedia.org/wiki/ambigram" class="extiw" title="en:ambigram">Ambigram</a> <b><a href="https://en.wikipedia.org/wiki/M._C._Escher" class="extiw" title="en:M. C. Escher">Escher</a></b> with reversible drawing hands using a permanent marker. <a href="https://en.wikipedia.org/wiki/Ambiguous_image" class="extiw" title="en:Ambiguous image">Ambiguous image</a>, symmetry of 180 degrees, photomontage. <a href="https://en.wikipedia.org/wiki/M._C._Escher" class="extiw" title="en:M. C. Escher">M. C. Escher</a>'s work features mathematical objects and operations including impossible objects, explorations of infinity, reflection, symmetry, perspective, truncated and stellated polyhedra, hyperbolic geometry, and tessellations. This composition is a tribute inspired by a <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210616043007/https://i.guim.co.uk/img/static/sys-images/Guardian/Pix/pictures/2015/6/17/1434539518440/c4c72d54-7e51-4b6a-8943-732476a206f8-2060x1746.jpeg?width=620&amp;quality=85&amp;auto=format&amp;fit=max&amp;s=ca5bb5fed674ad1083caaa1a1dad9e19">famous creation by Escher featuring two reversible hands drawing each other</a> reciprocally.
<a href="//commons.wikimedia.org/wiki/User:Basile_Morin" title="User:Basile Morin">Basile Morin</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>