Peripheral drift illusions

I've always been a fan of optical illusions, and recently ran across some cool ones on another site:

http://www.cs.toronto.edu/~moraes/illusion.html
http://0ut.home.comcast.net/trippy.png
http://www.ritsumei.ac.jp/~akitaoka/motion-e.html

In the process of trying to figure out how they worked, I ran across this (http://www.psy.ritsumei.ac.jp/~akitaoka/PDrift.pdf) rather nice little article. The human mind is such an amazing toy. Just thought I'd share. :)

Totally awesome Lebb! I especially love the first one! Thanks. :D

Of course, doesn't it make you do this: :huh:

"How the mind works" by Stephen Pinker has a good chapter on these illusions and why we see them..plus it is all about weighten neural networks flip-flopping which brings in the nerd element.