While floating about the internet ignoring my studies, I stumbled across a video on Tokyo Tek that tickled my puzzle bone. Apparently there’s such a thing as the Best Illusion of the Year contest, and back in 2011 Koukichi Sugihara of the Meiji Institute for Advanced Study of Mathematical Sciences won for his magnet-like slopes:

Deceptively simple! It actually makes me want to watch tons of pitagora switch videos. But check out the rest of the illusions on the site to see some really neat stuff! Happy Friday!