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# Cool effect
I have a book all about optical illusions that has a picture with the same effect...except it's of Maggie Thatcher *shudder*.

[Happosai]
(I helped save b3ta! Happosai _,,,,_(O ; o)_,,,, Tue 24 May 2005, 0:16, archived)
# dear oh dear
 
I guess none of you lot have studied undergraduate psychology of perception recently.

The original article is by Peter Thompson, "Margaret Thatcher: a new illusion."
Perception 9:483–484 (1980).

Search google for "thatcher illusion" and you can see various demonstrations...

but still, woo!
(I helped save b3ta! Rapitinui get in the cage and I'll give you a treat, Tue 24 May 2005, 5:21, archived)