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A Picture Disc for Pi Day

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Happy Pi Day! To celebrate the world's favorite irrational number, we got out some compasses and conjured this geometric illusion. The revolving disc is called a phenakistoscope (also sometimes identified as a zoetrope) -- a type of circular moving art from the dawn of animation and cinema.For more Duke stories and videos, visit us at Duke Today: http://today.duke.edu

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Pi Pi Day Mathematics Geometry Turntable Zoetrope Phenakistoscope Animation Picture Disc Duke University Duke
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