Rhett Roxl is a freelance content writer and an avid video gamer. When he's not writing, or playing video games, or writing about video games, he makes and plays music at local bars.

Update – This paper dragon is an even better illustration of the effect, and you can make your own (if you have a printer). Amaze your friends! Really, you will. The illusion is a form of depth ...

Telling the front from the back of a mask can be more difficult than it seems. Thanks to an effect called the hollow-mask illusion, the brain can have trouble deciding if the image is convex or ...