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The Pi Day of the Century occurred this weekend when the date, including the year—3/14/15—matched the first five digits of the irrational number pi (3.14159265...). To celebrate the once-in-a-century event, Scientific American readers baked pies, cooked pizzas, ran races, held parties, and even drove a car until the odometer read the first six digits. Here are the photos to prove it:
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