LifeWiki:Did you know/3
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Revision as of 23:14, 14 May 2009 by Nathaniel (talk | contribs) (New page: ...that the block-laying switch engine and the glider-producing switch engine are the only two infinitely-growing patterns that are known to have ever occurred naturally?)
...that the block-laying switch engine and the glider-producing switch engine are the only two infinitely-growing patterns that are known to have ever occurred naturally?