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Celebrate Pi Day— an international holiday born at San Francisco’s Exploratorium. Join us for a live webcast where we examine the nature of everyone's favorite mathmatical constant, 3.1415926535…ad infinitum!
The Exploratorium celebrates the 20th anniversary of Pi Day with a pie-throwing contest, Pi Day exhibits in Second Life, and more activities honoring everyone's favorite mathematical constant. It's geometry! It's knitting! It's—hyperbolic crochet! Artist and science writer Margaret Wertheim shows you how to represent a hyperbolic plane using crochet hooks and yarn. Beginning with a simple crochet chain, learn how to create a geometric shape with a constant negative curvature just by adding stitches.