“Leonardo da Vinci’s Codex on the Flight of Birds,” possibly one of the world’s most famous notebooks, goes on view Friday, Sept. 13, at the Smithsonian’s National Air and Space Museum for a 40-day exhibit, ending Oct. 22.

Made up of 18 folios (two-sided pages) and written in the artist’s famous “mirror” script, the collection of notes and sketches foreshadows devices and principles of mechanical flight by exploring bird flight and behavior. The Renaissance genius created the notebook between 1505 and 1506, when he also painted his masterpiece, the “Mona Lisa.”

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