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In this episode of The Atlas Obscura Podcast, we check out one of the oldest—and most misunderstood—books in the world. A medievalist tells us all about the mysterious Voynich Manuscript, in the collection of the Beinecke Rare Book and Manuscript Library at Yale.

Our podcast is an audio guide to the world’s wondrous, awe-inspiring, strange places. In under 15 minutes, we’ll take you to an incredible site, and along the way you’ll meet some fascinating people and hear their stories. Join us daily, Monday through Thursday, to explore a new wonder with cofounder Dylan Thuras and a neighborhood of Atlas Obscura reporters.

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