The January 2004 issue of Wired magazine includes a full-color, full-page image similar to this one (cropped from Uzumaki (Rabbit Spirals)). Both images are the work of Akiyoshi Kitaoka, Department of Psychology, Ritsumeikan University, Kyoto, Japan.
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Note to self: read this article during a recent vacation, which referenced this illusion by Mr. Kitaoka on 5/24/2009.