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Secret Worlds
Secret worlds
Number 52
Date Jan. 21st 2006
Previous Malaria
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Secret Worlds is the 52nd xkcd comic.

ExplanationEdit

The image resembles a fractal. A fractal is a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole, a property called self-similarity.

Mouseover textEdit

"No two adjacent circles are the same color."

See alsoEdit