Check out http://illusionoftheyear.com/ http://illusionoftheyear.com/ It's a yearly contest with people coming up with various stuff. Normally one finds Kokich

Check out http://illusionoftheyear.com/ http://illusionoftheyear.com/ It's a yearly contest with people coming up with various stuff. Normally one finds Kokichi Sugihara in the top. I'm a big fan of him after meeting him at a conference (FUN With Algorithms), and made my own attempts on some of his concepts: https://github.com/Matsemann/impossible-objects https://github.com/Matsemann/impossible-objects