JoshuaQuinn

We do not tolerate people that talk or text in the theater. In fact, before every film, we have several warnings on screen to prevent such happenin...

A 3D model of Escher's impossible crate. This solution is different than the Jerry Andrus model or the "cutaway" model. In those models, the crat...

Available at: http://www.mentallyimpossib...

Effect: You tear your business card into two solid, permanently linked paper rings, whi...