Akiyoshi's Illusions

Akiyoshi Kitaoka has been making (and writing extensively about) illusions and why the mind reacts to them the way it does for several years.
He updates the site quite frequently (in fact that's why I'm posting this now ... he updated on Monday), and it is always fun for me to look at his new work.
Check out all of his illusions here ... impressive!

And - if you are ever so inclined (unlike me) - you can even read a lot of the published work he has done, and some of the speeches he has made here.