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Found a source for magic circles

There's a visual illusion involving two circles posted at:

Well, I found a URL that is quite probably the source of that illusion:

By the way, lots of topics here make me wonder where is their root message. Where can I find the root message for the topic with title "crazy guy on the airplane"?


stefaan dot r dot m dot meeuws at pandora dot be

Stefaan R. M. Meeuws
Monday, December 22, 2003

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Monday, December 22, 2003

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