I have heard once that Mario Ponzo worked at FIAT Research Center in Turin in the early XX century and that’s where he synthesized this illusion. I was amazed of reading this: how did he ever come across this illusion? What was he working on? Was it a case of discovery by chance or a deliberate research? If anybody knows more about it, please do post comments or email me.
As a side remark, I have searched Wikipedia for Ponzo’s Illusion and I have found the term only in the English Wikipedia, whereas there is no mention in any other languages nor there is a short biography upon its author. Shouldn’t we make up for this?
