This Is Just Plain Cool

Don't recall how I ended up here, but you should check out this Wikipedia entry on the Voynich Manuscript, a 240-page,14th-century book written in code that nobody can break.

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Here's a quote from wiki: "The Voynich manuscript is a handwritten book thought to have been written in the early 15th century and comprising about 240 vellum pages, most with illustrations. Although many possible authors have been proposed, the author, script and language remain unknown. It has been described as "the world's most mysterious manuscript".